Lagniappe for March 2025

Lagniappe for March 2025

4 Min Read

Lagniappe for March 2025

new production RS-25 engine arriving at the Fred Haise Test Stand

Explore Lagniappe for March 2025 featuring:

  • NASA Stennis Teams Install New Production RS-25 Engine for Upcoming Hot Fire
  • NASA Stennis Flashback: Learning About Rocket Engine Exhaust for Safe Space Travel
  • NASA in NOLA for Super Bowl

Gator Speaks

Gator, a fictional character, for the Lagniappe for March 2025 issue is seen on a background of clover
Gator Speaks
NASA/Stennis

Welcome to March. It is the month that refuses to sit still. One day, the sun is shining, and the next day, the wind is howling through the trees, especially in the 125,000-acre buffer zone at NASA Stennis.

The buffer zone and location of NASA Stennis helps provide the right conditions for around-the-clock propulsion test capabilities.

March, like NASA Stennis, is full of possibilities.

The month kicks off a season of new beginnings. It is a time when farmers begin to plant seeds.

Did you know powering space dreams at NASA Stennis is a lot like farmers planting seeds?

Planting a seed is simple, yet profound. It signals a fresh start no matter if you are an experienced planter or if it is your first time.

Picking the right seed, carefully choosing the spot, and preparing the soil are ways to get going. Anticipation begins in March as planters set the stage for something that will happen over time.

Similarly, NASA Stennis is the right place to pick for many aerospace companies large and small. It is where the road to launch begins.

Whether the company is brand new to the field, like a first-time planter, or more experienced, the soil is right at NASA Stennis. South Mississippi is where a team of experts can help companies achieve a successful outcome.

Ah yes, the month of March and NASA Stennis are indeed alike.

They both can be a bridge between what was and what is to come – one, a time of year and the other, a place to shake off the winter slumber, take a deep breath, and step into something new.

There is something magical about planting seeds, just like there is something magical about powering space dreams at NASA Stennis.

NASA Stennis Top News

NASA Stennis Teams Install New Production RS-25 Engine for Upcoming Hot Fire

NASA marked a key milestone Feb. 18 with installation of RS-25 engine No. E20001, the first new production engine to help power the SLS (Space Launch System) rocket on future Artemis missions to the Moon.

NASA Stennis Flashback: Learning About Rocket Engine Exhaust for Safe Space Travel

NASA’s Stennis Space Center near Bay St. Louis, Mississippi, is widely known as the nation’s largest rocket propulsion test site.

Center Activities

NASA in NOLA for Super Bowl

NASA Stennis Leaders Visit Kennedy Space Center

Leadership Class Visits NASA Stennis

a group of people from the Pearl River County Leadership stand in front of the the Thad Cochran Test Stand
The Pearl River County Leadership Class visits the Thad Cochran Test Stand (B-1/B-2) during a NASA Stennis tour on Feb. 20. NASA Stennis is at the front end of the critical path for the future of human deep space exploration through NASA’s Artemis campaign. The B-2 side of the Thad Cochran Test Stand is undergoing preparations for exploration upper stage testing. The upper stage is scheduled to undergo Green Run tests of its integrated systems before its first flight on the Artemis IV mission. The test series will culminate with a hot fire of the stage’s four RL10 engines, just as during an actual mission.
NASA/Danny Nowlin

Rocket Lab Leader Visits NASA Stennis

NASA Stennis Director John Bailey, left, stands with Richard French, Rocket Lab USA, Inc. vice president of business development and strategy of space systems
NASA Stennis Director John Bailey, left, welcomes Richard French, Rocket Lab USA, Inc. vice president of business development and strategy of space systems, for a tour of NASA Stennis on Feb. 26. In 2022, NASA and Rocket Lab reached an agreement for the aerospace company to locate its engine test complex at NASA Stennis. The initial 10-year agreement between NASA and Rocket Lab includes an option to extend an additional 10 years. The Archimedes Test Complex includes 24 acres surrounding the site’s A-3 Test Stand. Archimedes is Rocket Lab’s liquid oxygen and liquid methane rocket engine to power its medium-lift Neutron rocket. The company successfully completed the first hot fire of the new Archimedes rocket engine at NASA Stennis in August 2024.
NASA/Danny Nowlin

NASA in the News

Employee Profile: Jason Hopper

a man wearing a blue and white striped shirt stand on the E Test Complex stairs
NASA’s Jason Hopper is shown at the E Test Complex at NASA’s Stennis Space Center.
NASA/Danny Nowlin

Jason Hopper’s journey to NASA started with assessing the risk of stepping into the unknown.

Additional Resources

Subscription Info

Lagniappe is published monthly by the Office of Communications at NASA’s Stennis Space Center. The NASA Stennis office may be contacted by at 228-688-3333 (phone); ssc-office-of-communications@mail.nasa.gov (email); or NASA OFFICE OF COMMUNICATIONS, Attn: LAGNIAPPE, Mail code IA00, Building 1111 Room 173, Stennis Space Center, MS 39529 (mail).

The Lagniappe staff includes: Managing Editor Lacy Thompson, Editor Bo Black, and photographer Danny Nowlin.

To subscribe to the monthly publication, please email the following to ssc-office-of-communications@mail.nasa.gov – name, location (city/state), email address.

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LaToya Dean

How NASA Employee Went from Rock Climbing to Rocket Propulsion

How NASA Employee Went from Rock Climbing to Rocket Propulsion

a man wearing a blue and white striped shirt stand on the E Test Complex stairs
NASA’s Jason Hopper is shown at the E Test Complex at NASA’s Stennis Space Center.
NASA/Danny Nowlin

Jason Hopper’s journey to NASA started with assessing the risk of stepping into the unknown.

One day, while taking a break from his hobby of rock climbing at Mississippi State University, a fellow student noticed Hopper reading a rocket propulsion textbook with a photo of a space shuttle launch on the cover.

Rocket propulsion – the technology that propels vehicles into space, usually through liquid rocket engines or solid rocket motors – is a highly complex field. Engineers rigorously test the propulsion systems and components to understand their capabilities and limitations, ensuring rockets can safely reach space.

“A guy just walked up and randomly said, ‘Hey, my dad works testing rocket engines,’” Hopper recalled.

Hopper, an aerospace engineering student at the time, did not know about NASA’s Stennis Space Center near Bay St. Louis, Mississippi. He soon would learn more.

The fellow student provided him with contact information, and the rest is history.

A Meridian, Mississippi, native, Hopper graduated from Mississippi State in 2007 and made his way to America’s largest rocket propulsion test site in south Mississippi.

On the other side of Hopper’s risk of stepping into the unknown came the reward of realizing how far he had come from reading about rocket propulsion work to contributing to it.

The career highlight happened when Hopper watched a space shuttle launch, powered in part by an engine he had fired up as a test conductor working at NASA Stennis.  

“You cannot really put it into words because it permeates all through you, knowing that you are a part of something that big while at the same time, you are just a little piece of it,” he said. 

Hopper transitioned from his contractor position to a civil servant role as test conductor when he joined NASA in 2011.

His work as a test conductor throughout all the NASA Stennis test areas and as test director at the E Test Complex has benefited NASA and industry, while giving him a good perspective on the value of the center’s work.

Among the projects he has played a large role in include the J-2X engine test program, build up for NASA’s SLS (Space Launch System) core stage hot fire ahead of the successful Artemis I launch and multiple projects throughout the E Test Complex.

“We offer operational excellence that I would argue you cannot get anywhere else,” Hopper said. “NASA Stennis is a smaller, family-oriented center renowned for excellence in rocket propulsion testing. It is a small place, where we do amazing things.”

Propulsion test customers at NASA Stennis include government and commercial projects. The NASA center is engaged in two projects to support the agency’s SLS rocket – testing of RS-25 engines to help power SLS launches and of NASA’s new exploration upper stage to fly on future missions to the Moon.

Current commercial companies conducting work at NASA Stennis include Blue Origin; Boeing; Evolution Space; Launcher, a Vast company; Relativity Space; and Rolls-Royce. Three companies – Relativity Space, Rocket Lab, and Evolution Space – are establishing production and/or test operations onsite.

After leaving south Mississippi for a four-year stint at NASA’s Marshall Spaceflight Center in Huntsville, Alabama, Hopper returned to NASA Stennis as risk manager of NASA’s Rocket Propulsion Test Program Office.

In his day-to-day work, Hopper assesses risk around two questions – what is the risk and what do I really need to be focusing on?

Making decisions through this filter helps the Poplarville, Mississippi, resident make the best use of the agency’s rocket propulsion test assets, activities, and resources.

“With a risk perspective, if things are high risk, we need to address these items and focus our attention on them,” Hopper said. “If we lose a national test capability, that impacts more than just NASA; it impacts the nation because NASA is a significant enabler of commercial spaceflight.”

Hopper helps oversee the maintenance and sustainment of propulsion test capabilities across four sites – NASA Stennis; NASA Marshall; NASA’s Neil Armstrong Test Facility in Sandusky, Ohio; and NASA’s White Sands Test Facility in Las Cruces, New Mexico.

By establishing and maintaining world-class test facilities, the agency’s Rocket Propulsion Test Program Office ensures that NASA and its partners can conduct safe, efficient, and cost-effective rocket propulsion tests to support the advancement of space exploration and technology development. 

Hopper looks to the future with optimism.

“We have an opportunity to redefine kind of what we as NASA and NASA Stennis do and how we do it,” he said. “Before, we were trying to help commercial companies figure things out. We were trying to get them up and going, but now we are in more of a support role in a lot of ways and so if you look at it, and approach it the right way, it can be very exciting.”

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LaToya Dean

Orion Deputy Program Manager Debbie Korth Receives 2025 Engineer of the Year Award

Orion Deputy Program Manager Debbie Korth Receives 2025 Engineer of the Year Award

The National Society of Professional Engineers recently named Debbie Korth, Orion deputy program manager at Johnson Space Center, as NASA’s 2025 Engineer of the Year. Korth was recognized during an award ceremony at the National Press Club in Washington, D.C., on Feb. 21, alongside honorees from 17 other federal agencies. The annual awards program honors the impactful contributions of federal engineers and their commitment to public service.

Orion Deputy Program Manager Debbie Korth, in a black suit and pink blouse, stands on a stage with the National Society of Professional Engineers logo behind her.
Debbie Korth received the NASA 2025 Engineer of the Year Award from the National Society of Professional Engineers at the National Press Club in Washington, D.C. Image courtesy of Debbie Korth

Korth said she was shocked to receive the award. “At NASA there are so many brilliant, talented engineers who I get to work with every day who are so specialized and know so much about a certain area,” she said. “It was very surprising, but very appreciated.”

Korth has dedicated more than 30 years of her career to NASA, supporting human spaceflight development, integration, and operations across the Space Shuttle, International Space Station, and Orion Programs. Her earliest roles involved extravehicular and mission operations planning, as well as managing spaceflight hardware for shuttle missions and space station crews. Working on hardware such as the Crew Health Care System in the early days of space station planning and development was a unique experience for Korth.

After spending significant time in Russia collaborating with Russian counterparts to integrate equipment such as a treadmill, cycle ergometer, and blood pressure monitor into their module, Korth recalled, “When we finally got that all delivered and integrated, it was a huge step because we had to have all of that on board before we could put crew members on the station for the first time. I remember feeling a huge sense of accomplishment and happiness that we were able to work through this international partnership and forge those relationships to get that hardware integrated.”

Korth transitioned to the Orion Program in 2008 and has since served in a variety of leadership roles. In her current role, Korth assists the program manager in the design, development, testing, verification, and certification of Orion, NASA’s next-generation, human-rated spacecraft for Artemis missions. The spacecraft’s first flight test around the Moon during the Artemis I mission was a standout experience for Korth and a major accomplishment for the Orion team.

“It was a long mission and every day we were learning more and more about the spacecraft and pushing boundaries,” she said. “We really wrung out some of the core systems – systems that were developed individually and for the first time we got to see them work together.”

Korth said that understanding how different systems interact with each other is what she loves most about engineering. “In systems engineering, you really look at how changes to and the performance of one system affects everything else,” she said. “I like looking across the entire spacecraft and saying, if I have to strengthen this structure to take some additional landing loads, that’s going to add mass to the vehicle, which means I have to look at my parachutes and the thermal protection system to make sure they can handle that increased load.”

The Orion team is working to achieve two major milestones in 2025 – delivery of the Artemis II Orion spacecraft to the Exploration Ground Systems team that will fuel and integrate Orion with its launch abort system at NASA’s Kennedy Space Center, and the spacecraft’s integration with the Space Launch System rocket, which is currently being stacked. These milestones will support the launch of the first crewed mission on NASA’s path to establishing a long-term presence at the Moon for science and exploration, with liftoff targeted no earlier than April 2026.

“It’s going to be a big year,” said Korth.

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Linda E. Grimm

Sols 4468-4470: A Wintry Mix of Mars Science

Sols 4468-4470: A Wintry Mix of Mars Science

2 min read

Sols 4468-4470: A Wintry Mix of Mars Science

A grayscale photo from the Martian surface shows very uneven terrain covered in large rocks, with the Curiosity rover taking up the right side of the image, from the top-right corner to the bottom center of the frame. Parts of the rover chassis are visible, as well as two of the wheels; the one near the top of the frame is seen perched atop one of the large rocks here.
NASA’s Mars rover Curiosity captured this image showing its wheel awkwardly perched atop one of the rocks in this location, as well as the textures of the layered sulfate unit bedrock blocks. The rover used its Left Navigation Camera (Navcam), one of a pair of stereo cameras on either side of the rover’s masthead, to record the image on Feb. 28, 2025, on sol 4466, or Martian day 4,466 of the Mars Science Laboratory mission, at 00:34:10 UTC.
NASA/JPL-Caltech

Written by Lucy Lim, Planetary Scientist at NASA’s Goddard Space Flight Center

Earth planning date: Friday, Feb. 28, 2025

Curiosity continues to climb roughly southward through the layered sulfate strata toward the “boxwork” features. Although the previous plan’s drive successfully advanced the rover roughly 21 meters southward (about 69 feet), the drive had ended with an awkwardly perched wheel. Because of this, unfortunately it was considered too risky to unstow the arm for contact science in this plan.

Nevertheless the team made the most of the imaging and LIBS observations available from the rover’s current location. A large Mastcam mosaic was planned on the nearby Texoli butte to capture its sedimentary structures from the rover’s new perspective. Toward the west, the boxwork strata exposed on “Gould Mesa” were observed using the ChemCam long-distance imaging capability, with Mastcam providing color context.

Several near-field Mastcam mosaics also captured some bedding and diagenetic structure in the nearby blocks as well as some modern aeolian troughs in the finer-grained material around them.

On the nearby blocks, two representative local blocks (“Gabrelino Trail” and “Sespe Creek”) are to be “zapped” with the ChemCam laser to give us LIBS (laser-induced breakdown spectroscopy) compositional measurements. The original Gabrelino Trail on Earth near the JPL campus is currently closed due to damage from the recent wildfires.

Meanwhile, the season on Mars (L_s ~ 50, or a solar longitude of about 50 degrees, heading into southern winter) has brought with it the opportunity to observe some recurring atmospheric phenomena: It’s aphelion cloud belt season, as well as Hadley cell transition season, during which a more southerly air mass crosses over Gale Crater. 

This plan includes an APXS atmospheric observation (no arm movement required!) to measure argon and a ChemCam passive-sky observation to measure O2, which is a small (less than 1%) but measurable component in the Martian atmosphere. Dedicated cloud altitude observations, a phase function sky survey, and zenith and suprahorizon movies have also been included in the plan to characterize the clouds. As usual, the rover also continues to monitor the modern environment with measurements of atmospheric opacity via imaging, temperature, and humidity with REMS, and the local neutron environment with DAN.

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Last Updated
Mar 04, 2025

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Interview with Sean Colgan

Interview with Sean Colgan

I’m really pleased that you agreed to take advantage of this opportunity.  I don’t recall if I have actually met you personally,  but if so, then I apologize for not remembering.

I don’t think so, although you’ve certainly signed things for me.

Well, I guess I have because I do remember seeing your name from time to time on various things. You’ve been at Ames a long time and we’ll have you talk about that in a little bit. The focus of these interviews is not specifically on your work. In fact, it was intended to broaden people’s understanding of who you are and what you do when you’re not at work, because we get compartmentalized and mostly get to know people through our work interactions, so we’ll be touching on your other interests. As you’ve seen if you’ve read some of these, we generally start with your childhood. I try to look up bios and things like that ahead of time to see what I can glean before these interviews but you don’t have a very substantial presence on the web.

I’m not a very public person.

I did find that out (laughs).

I did not volunteer for these and I tried to lay low until you hunted me down! (laughs)

Well, I think you’ll be pleased and as I said, you can stay as private as you want during this whole interview.

Sounds good.

We like to start with where you were born, your family at the time, what your parents did, if you have siblings, and then we ask when became aware of or developed an interest in what you have pursued as a career.

OK, and I’m going to be looking sideways at my notes because I printed out your list of questions and thought about them. Hopefully I won’t mess it up too much. I’m a big believer in the written word. I was born in Oakland, just up the Bay.

So was I, so we have a connection right there!

Up through my preteen years I grew up split between Oakland and North Lake Tahoe. My dad was a masonry contractor. When school got out in June we would go up to Tahoe where there was lots of work for him, building foundations for homes and so forth. When Christmas break came in school, we came back down to Oakland. We had a home in both places and dad could get work in the winter in the Bay Area. In the middle of every year during my preteen years, I switched between two schools. It was usually a bit of a jolt because the Oakland schools were ahead of the Tahoe schools, so there were a couple weeks of flailing about in January trying to catch up. They all used the same textbooks, but we were a couple of chapters behind at that point and had to catch up.

When I was 12, Dad had established his business well enough at Tahoe that my parents sold both of the houses, built a somewhat bigger one, and we moved to Tahoe permanently. So from seventh grade through high school it was all at the northern end of Lake Tahoe.

I have one sibling, a brother.

And when did I start thinking about becoming an astronomer? I can’t remember exactly, to be perfectly honest. I do remember my parents showing me the constellations. I can remember specifically which constellations my dad showed me and which ones my mom showed me. I can’t remember a time when I wasn’t interested primarily in being an astronomer, but I probably went through an astronaut phase because it was the ‘60’s!  I got an astronomy book for my birthday one year and I know it was before I could really read and understand it. I remember looking at the pictures. In thinking about this interview, I went back and looked.  That book was published when I was five, so probably by the time I was five I was talking about it enough that I got this book for my birthday. I don’t have any similar books on other topics from that time. All the other books I have from back then are astronomy books for kids.

Well, you were living in Lake Tahoe, which by the elevation and the clarity and lack of ambient lights around you would have had a really good view of the stars and constellations.

Right. It was great. Although before we moved up there full time we were mostly there in the summer, so it didn’t get dark until after my bedtime.  When we moved up there full time, then I could go out in the winter and yeah, we had a spectacular view of the southern sky. There were woods but we could see over the trees. We could see the center of the Milky Way, and so forth. I had binoculars and a couple of small telescopes that I’d use, along with a star atlas to point me toward interesting things to look at.

Did you say what your mother did? Did she work outside the home?

Mom was a writer.  We traveled each year when we were growing up. She would write travelogues of those trips and try to get them published. She also wrote haiku poetry, and she tried her hand at writing other things. She was published a bit, but not a whole lot. Mom did get one of her travelogues published in the Christian Science Monitor. That was a highlight for her.

And was your brother older or younger?

My brother is two years younger, and we had somewhat similar trajectories.  We’ll get to education later but he majored in physics as well. He followed me in similar universities, but ended up going into material sciences. He is now on the East Coast working for IBM.

That’s great.

He was named a Master Inventor in 2018.

A what?

A Master Inventor. He has over 200 patents, so IBM honored him with this title.

That’s quite an honor!  Your education was interesting because of the split between the two schools.  But then at some point, when you went to college, you had to declare a major. You said you had already developed an interest in astronomy, so did you pursue that science discipline right off the bat?

I went to UC Riverside for two years, and then I transferred to Caltech. My freshman year  I really nailed down my choice for astronomy. I remember going to the Career Center and taking an interest survey, which has nothing to do with what you’re able to do. It just asks what you’re interested in doing, and it came up as physicist or musician.  I have no musical skills so that pointed me in the other direction. I thought briefly about geology, since my dad had been a geology major, but I really settled on astronomy at that point, which is why I transferred. Riverside didn’t have an astronomy major,  they only had a physics major. I really wanted to get an astronomy background and start on it early.

My time at Caltech was probably the toughest two years I’ve ever had. I was behind because I had gone to Riverside for two years and the Caltech student body was extremely competitive. Caltech was not generous with their transfer credits. I ended up taking a very heavy course load, but I did make it out in two years. From there I applied to a number of grad schools. I settled on Cornell for a couple reasons: First of all because they had groups working in the areas  of astronomy I thought I was interested in, which were radio and infrared. Second of all, after four years in southern California I really wanted to go to a more rural setting to continue my education.

I have to ask this because when we’ve interviewed others who have gone to Cornell, most of them have mentioned the influence of Carl Sagan and I just wondered if that figured into your choice, or was he gone by the time you went there?

Well, I  did meet Carl, at a second year reception he threw for the grad students.  He was gone most of my first year working on Cosmos the television show. He had taken a leave of absence and wasn’t around. When he came back he threw a reception for all of us, and I got to shake his hand. He was a planetary scientist, of course, and that was not where I was aiming my trajectory.  I didn’t see him a whole lot other than that one reception. Although from time to time the kind of people you really don’t want wandering around the halls would come around the building looking for Carl Sagan. Security would chase them down and get them out. These are really my most distinct memories of Carl.

And your PhD was in astronomy, not physics?

It was in astronomy and my dissertation was on radio astronomy. I did it almost exclusively at Arecibo (Arecibo Observatory, National Astronomy and Ionosphere Center, Arecibo, Puerto Rico) with a little bit at the VLA (Very Large Array Radio Telescope facility, near Socorro, New Mexico). I got to work with some really smart people at Cornell, observational and theoretical.

At this point we usually inquire about the connection or the influence, that brought you from your PhD to NASA Ames.

My degree was in radio astronomy but the other interest I always had along the way, which I hadn’t been able to look into, was infrared astronomy. Getting post docs is very competitive, back then we called them NRC’s. The NRC offer from Ed Erickson’s group at Ames was the best offer, so I came out for that. It wasn’t a sure thing, there was back and forth and the highest rated candidate had to turn down the job before they would make me an offer.  But fortunately for me the highest rated candidate was my office mate at Cornell. I knew he was going to turn down the offer as soon as he got another one he wanted, so I was aware a little bit in advance of getting the call from Ed that things had worked out.

And Ed was your advisor?

Ed was my advisor. So I came and did two years as an NRC and then continued working with the group. I had made myself sufficiently useful that when I was ready to apply for other jobs, Ed offered me a raise if I’d stay with the group and continue working. That was a really good time. We flew on the KAO (Kuiper Airborne Observatory). They didn’t really have facility instruments, so we had our own instrument, but we did support observers from outside our group. We probably had more flights than any other instrument on the KAO during that period. It was a lot of flights. We had to operate it ourselves. All of us had our own particular jobs on flights. We did everything from prepping for the observations, writing proposals, all the way through to seeing them published. We were a small team: Ed Erickson, Mike Haas; Jan Simpson, and Bob Rubin on the science side helped out. We had a shop guy, Gene Beckstrom, and others after him.  We had a lab technician, Jim Baltz. Dave Hollenbach would also work with us, and that was very rewarding. He was a very sharp guy in terms of theory, ideas and projects to do. Here is a photo of some of us with our instrument rack getting ready for a KAO flight:
Sean Colgan with his family
So you came in on an NRC postdoctoral fellowship in the mid-‘80’s?

Yes, I started on October 6th, 1986.

And your first work was on the KAO and then probably a decade later you continued on SOFIA (Stratospheric Observatory for Infrared Astronomy)?

It was ‘95 or ‘96 when they shut down the KAO to use the funding for SOFIA development. I remember the meeting still. It was in the upstairs auditorium and they came in and announced they were shutting the KAO down. I think it was Dave Morrison, who was the division chief, who told us not to whine about shutting it down because planetary missions sometimes had years when they didn’t have their facilities. In this case it was only going to be two years and we would be up and flying in 1997. Of course, as we know, it was more like ten years after that before we were even close to flying.

Yes, I thought the same thing, that it was not going to be two years. It always takes longer than that.

Well, I don’t think anybody thought it was going to be as many years as it was.

But you flew on both the KAO and SOFIA?

I had ninety nine flights on the Kuiper (KAO) because I kept track of them, and on SOFIA I had two flights, so I was not a flyer on SOFIA. It was more of a facility observatory, and the people who flew a lot were really part of the observatory. They were operating the telescope or operating a science instrument. My flights on SOFIA were because I had written some software for the GREAT Instrument (German Receiver for Astronomy at Terahertz Frequencies, a modular dual-color heterodyne instrument for high-resolution far-infrared spectroscopy) to help them interface with SOFIA. I was along on  those commissioning flights for GREAT in case my software broke. They wanted me on board. Interestingly by the rules at the time, I wouldn’t be allowed to actually fix the software in flight because it was flight software and had to go through all the reviews. None of the people who could do the reviews were on the airplane, but I could see how it broke and maybe I could suggest workarounds. It was not nearly as much fun for me as the KAO. I didn’t really have a job. The software had issues from time to time, but it basically worked. Everybody else had jobs, so for me it was less interesting, which is why I didn’t make a huge effort to keep flying on SOFIA.

Did you stay on the SOFIA project as a somewhat non flying support person?

Yes, from when the Kuiper stopped flying until about, well now, my primary work on SOFIA has been first with the project science team during development – trying to make sure they met our requirements, helping everybody understand our requirements, trying to make sure they weren’t making any huge mistakes. They made them anyway, especially when they didn’t listen to us, but we did our best. During the early years of SOFIA, I was also on the Ames team developing AIRES – a facility Science Instrument for SOFIA. I led the software effort, but the development was canceled in 2001. I then got involved with the software that people would use to propose to SOFIA, the proposal software, the software to estimate how long you should be asking for time, the sensitivity of the instruments, pieces of software like that. I worked with Dave Goorvich. We got software from other observatories as starting points and then modified them for SOFIA, software “re-use” they called it. And that was basically my main job throughout SOFIA’s lifetime. Once we developed those, the USRA (Universities Space Research Association) folks built their team around maintaining them and I joined that team because I’d been working on this software for so long. I also got into the package I mentioned to help GREAT interface to SOFIA. It basically made SOFIA look like the telescope that the GREAT team had been using for years, an observatory called KOSMA. We called it the translator and it translated KOSMA commands into SOFIA commands; then SOFIA housekeeping back into KOSMA housekeeping, so they didn’t need to change their software to work with SOFIA. As the aircraft started flying, it became quite clear that I was oversubscribed. I was not meeting my deadlines for either of those two efforts, so I gave up the translator. They hired another fellow to maintain that, although I stayed in touch with it for some years, helping him when he had questions and so forth. I then focused my main effort over on SOFIA’s DCS (Data Cycle System) side.              

What has been your most interesting work here at Ames?

I’d say it was flying on the KAO, but very specifically it was Supernova 1987A which occurred after I had been here for only a couple of months. It went off in February of 1987. Nobody really knew what it would look like in the infrared to an instrument on an observatory like the KAO, so it was obviously a huge deal since it was the closest supernova for hundreds of years.  Our team just completely redirected  to carry out observations of the supernova.  Dave Hollenbach and I worked together to try and figure out what we would see. We wrote up the science portion of the proposal,. For these observations, our instrument – the CGS (Cooled-Grating-Spectrometer) – had to be fairly substantially reworked in the sense that the grating needed to be changed to go to lower resolution and the detectors needed to be changed to get wider bandwidth and go to shorter wavelengths. Ed and Mike worked long days, weeks, and months to make all of those changes happen. In our proposal we made some predictions about which lines we could see, mostly iron lines, and which ionization states. We put that in the proposal, which was accepted. We then wrote up the proposal as a separate paper. When we went down and did the observations, we actually got some of it right. Surprisingly, iron was indeed bright. We thought we’d be seeing all different ionized states of iron, from singly, doubly, triply ionized iron, when in fact it was very much concentrated in singly ionized iron with a little bit of doubly ionized iron, there was a faint line there. We had gotten the temperatures right, but we didn’t quite get the ionization right. We were in the ballpark, so I think this was really the most interesting work in that when we started nobody had really seen anything like it before. We were starting from very basic principles, and we followed that all the way through to a nice series of papers. We went down for three different epochs because the lines were changing with time as the supernova ejecta expanded. We obtained three sets of measurements, which resulted in three papers.

What I’m currently working on? Well, SOFIA is, of course, shut down and I am working as part of the shutdown process. We’re trying to reprocess a lot of the data to bring it up to standard, especially the older data. We learned more about the instruments as time went on, so we can now do a better job of reducing the data. I’m helping out with reducing the data, getting it into the archive as we shut down, and of course, writing proposals.

What comes next? So far I’ve collaborated mainly with Naseem, whom you have spoken to, Sarah Nickerson, whom you also have spoken to, and Doug Hoffman (whom we’ve also spoken to). So that’s proposals.

How is your work relevant to Ames and the NASA mission? 

Well, I’ve worked on NASA missions almost my entire career, so I think that’s the closest to relevance as you can get.

What is a typical day like for you?

I mostly work, well before the pandemic in my office, but now it’s back and forth. I do like to come into the office although this week is a little different. That’s why we’re doing this interview from home. My wife is out of town and I like to work at home on those weeks just to keep the dog out of trouble. So I’m at a computer. I’m a software guy and a data analysis guy, not a lab guy, so I work at the computer. I actually have several computers on my desk. I look like a real developer (laughs). If you see my desk, I’ve got a couple of big screens and couple of computers underneath hooked up to different things and I can switch them around. So that’s a typical day, but at home it’s a little tougher. I don’t have a desk that can really manage the big screens, so I’ve just got one little laptop screen to work with.

Is home close enough that the pandemic shut down of the Center didn’t really save you a whole lot of commute time?

I live across the Bay in Newark, which physically is not far, but traffic wise is not good. I typically come in later and stay later because that works with my wife’s schedule and also works with the traffic. We’re not so close that it’s easy. I hated during the pandemic having to work at home all the time because of the small screen and with no room to spread out piles of paper or stay organized. That was definitely a challenge. I was very glad to get back on site.

What do you like most and least about your job?

Most would be doing science, but I also enjoy coding. Least is probably the standard sorts of things that most people whine about when given any opportunity.  All the stuff that goes with the job that isn’t science or coding, like IT security and paperwork. Right now I’m in the midst of training, taking courses I’ve taken every year for the last ten years, which gets a little old after a while, things like that. But somebody thinks you need to do it, and I hope it makes us a better organization for everybody doing it.

Do you have a favorite memory from your career? Or perhaps a research finding or breakthrough, or an unexpected research result?

My favorite memory would be the Supernova 1987A work in general. We found some unexpected things there and we got some things right.

If you could have a dream job, what would it be?

My dream job is pretty close to what I have. Pretty close without all the extra stuff.

What advice would you give to someone who wants a career like yours?

Of course you’ve got to work hard, and you need to have an aptitude for it. It’s a very competitive field, so you’ve also got to realize that luck, or being in the right place at the right time, can be a factor in whether you continue or not.  I’ve had colleagues who were very good at what they do, but they just weren’t in the right place at the right time. They ended up leaving the field or doing something less than what they hoped. Some things are just out of your control.

I did get lucky. I was in the right place at the right time. I flew on the Kuiper, and I developed skills. When SOFIA started, those skills were very much in demand.  That was my right place, right time moment, which is when I joined the civil service.  I had been a contractor  after my NRC ended through 1997. I became a civil servant then because there was so much work on SOFIA. I don’t know if that’s  helpful advice, but it’s just my take on things.

Well, you’re right. There’s something to being in the right place, at the right time and being prepared, but there’s always the serendipity aspect, which is just part of life. You could have wound up somewhere else and been just as happy, you know.

Oh yes, It doesn’t necessarily relate to happiness, but you’ve got to make the best with what you have.  I do feel lucky about that.

Would you like to share anything about your family? Kids, pets, activities? You mentioned a dog?

I’m going to mix the order up a little bit.

Sure, go ahead.

The accomplishment I’m most proud of that’s not science related would be 40 years of marriage to my fabulous wife. We just celebrated our 40th anniversary about a week and a half ago.

Congratulations! That is indeed an accomplishment.

So, no children but we do have a dog, a little Welsh Corgi. She’s our second corgi and she is just great. We do enjoy traveling. Typically, we’ll go on vacation in August. often to Europe. We’ve visited the UK five or six times, France a couple of times, Italy a couple of times. My father-in-law was born in Hungary, so we’ve gone there a couple times. Here is a photo of us at Lake Louise in 2019, with our Corgi.
Sean Colgan and his wife and Corgi at Lake Louise in 2019
What do we do for fun the rest of the time? Besides leisure travel, I enjoy gardening. We also enjoy musical events.  We have season tickets to the San Jose Opera, for example, and we’ll go up to San Francisco for concerts a couple of times a year. We probably have an event every other month.  During the pandemic, the restaurants and movie theaters were closed, but wineries with outdoor spaces were open.  They started serving food during the pandemic, and they allowed dogs, so we got in the habit of doing a lot of wine tasting on weekends just to get out. We still do some of that. To celebrate our 40th, we went up to Napa and tasted a lot of great wines. (laughs)

You mentioned that you’re not particularly musical, so you don’t play an instrument or anything, but you enjoy music and opera.

I enjoy listening to music. I played instruments as a child but had no particular talent for it, so. . . .

Do you like to read? And if so, any particular genre?

I read a fair bit, and it’s sort of divided. For entertainment, I’ll read fantasy and science fiction, but when we go on our trips, I’m always buying books about what we’re doing. For example, if we go to France and visit cathedrals, I’ll buy books about how they built cathedrals; or in England I’ll read about old Stone Age tombs. Everybody’s heard about Stonehenge, but there are stone circles and other stacks of stones, big ones, all over the landscape, so I will buy books and read about them. I have books about Roman battle tactics, etc. Oh yes, and I also have a lot of geology books, depending on where we go. When we went to the Canadian Rockies, I got a lot of geology books about that locale. I bring those home, stack them up, and read them, hopefully before the next trip. So yes, a lot of reading. When my wife travels, sometimes I’ll go hiking. She’s gone up to 15-20 weekends a year  She’s a textile artist.She teaches lacemaking, which is the way they used to make lace by hand, before machines. There are groups around the country that enjoy lacemaking, so she travels to  teach workshops for them on weekends.

Wow, that’s fascinating!

This week, she’s actually up in Sparks, next to Reno, where the National Convention is going on. It moves around every year, but this year it’s relatively close. She travels a lot for that, which keeps her busy. When she’s away, our dog and I will sometimes go for hikes, if we don’t have too much other stuff to do. Interestingly,  we are not the only astronomer-lacemaker couple in the world (laughs). There’s an Australian couple – Ron and Jay Ekers – with Jay a lacemaker and Ron an astronomer. We had dinner with them once when they were visiting in the Bay Area because our wives knew each other. My wife had once traveled down to teach in Australia. Normally she just travels around the U.S., but she has done some international trips.

Now, is this manual lacemaking with needles and thread or . . . ?

There can be needles and thread. That’s one form of it. What my wife teaches is “bobbin lace”, which is made on a pillow usually stuffed with straw. Two bobbins are connected by a thread with many of these pairs used to weave threads together to create the pattern. Photos of Louise’s designs are on her website – https://colganlacestudio.com/. Here’s a photo of what a lace pillow looks like.
Lace pillow for lacemaking
Interesting. And when did she get interested in this? Was it something she learned as a child, from her mother or grandmother?

No, it was at Cornell. She was in grad school there, which is where we met.

And what was her course of study?

She was in a Master’s program for historic preservation, basically how to preserve old buildings, of which there are many in upstate New York and few in the Bay Area. She had finished her class work, and I still had several years to go on my dissertation. She looked around for something to fill her time, and one of her friends – a colleague in her department – had already taken this up, and brought her to a meeting. She started taking classes from a local teacher, and by the time we moved west, she was well-versed. Not many people out here knew how to do it, so she started taking on students.

So I’m calculating back, since I’m a numbers guy, that if you just celebrated your 40th anniversary, then you must have married her while you were still in grad school?

Yes, about halfway through grad school, in 1983.

Interesting. So you’re a little bit responsible for her developing this interest in lacemaking?

I wouldn’t claim any of that.

But you’re responsible for giving her the time to develop this interest in lacemaking that she has done so well in.

It was all her effort. If anything, I made conditions difficult for her, and she found her way out (laughs). That’s probably the way I would phrase it.

Fair enough. But it’s very interesting. I like when we can poke around a little bit and find out interesting things, because then people who read this will say, “Well, I didn’t know that he went there or that his wife does lacemaking or the other things that you’ve talked about. That’s part of the purpose of these interviews.  Who or what inspires you?

That was a real easy one for me: the night sky.  It’s not so great in the Bay Area most times, but there’s so much going on up there. I mean, it’s really all laid out for you. Since I studied and read about  a lot about the sky as a kid, I know my way around it. a I also know fun little facts, so that’s entertaining to recall as well. When you get up in the mountains, of course it’s just beautiful.

I feel the same way. I don’t see how anyone can look up at and ponder the night sky and not be just fascinated by it. The questions that come up about what it is, how it came to be, what its purpose is, if there is one, and all of that is just fascinating.

Yes, I agree.

Do you have a favorite image, of space or anything that is particularly meaningful to you?

You know I don’t have one now. I mean, there are a lot of very nice ones out there. A big favorite I remember as a kid was a photo of H and Chi Persei, which is a double cluster of stars, not globular clusters but open clusters. It’s very colorful, with red stars and white stars and blue stars in the image – and just imagining it so far away, but these particular stars are so close together. I don’t know much about it, but something about it just impressed me. A photo like what I remember is at https://www.astrobin.com/337742/.

The reason we ask about images is because we like to include them in the post, especially about things you’ve talked about.  You mentioned for example, the Supernova 1987A. If a picture from SOFIA came out of that it would be a great addition to this interview. And then maybe you have a picture of you and the corgi on a hike, or your wife doing lace work, anything like that would be great.

Well, we’ll work on that.

[Photo thoughts: The three of us from Lake Louise, link to H & Chi Persei photo on the web, Lace Pillow showing bobbins]

That would be for when you return it after editing.  By the way the transcript is a living document so you can make changes right on it and that’s how it will go in. It isn’t all that formal, we’re not tracking edits or anything like that. We’ll add your pictures and get to a point where it’s set up as it would be when it gets posted and then we’ll send it to you for a final check.  We’re also several months out in terms of the queue of those that are going to be posted, so it won’t be immediate.

Good.

We’ve posted about 50 of these, but we’ve done another 20 that are in various stages of being made ready. We’ve sent them out but haven’t gotten them back yet because everybody’s so busy.  We do have a last question and that is do you have a favorite quote? One that you find meaningful, or witty, or clever, that kind of thing?

I did think about it. Sometimes you asked the question in the online ones about inspirational quotes and this is definitely not inspirational.

It doesn’t have to be.

I was hoping that because you didn’t say it here. My favorite quote is one my mom said a lot when I was growing up. She always attributed it to her father. I actually looked it up on the web, because I would have thought Mark Twain perhaps said it. It doesn’t seem that anybody famous has said it though. The reference is in a book from just ten years ago. The quote is: “The reward for good work is more work.”

Ah, I like that. That’s clever and witty and seems to be true.

Right.

One of my favorite quotes which I don’t think I put into my post because there’s so many of them is from Mike Griffin, former NASA Administrator. He was talking with the press, I think about risk management and why we do things that don’t always work out. He was explaining that there’s always a risk, and if you don’t accept the risk, then you don’t make progress, but they kept questioning him and pushing back on that idea. And he said, “I can explain it to you, but I can’t understand it for you.”  And I thought, that’s a good line!

Anyway, you ran the table here on the questions and I appreciate that you prepared ahead of time and wrote some notes down, which made the interview go very well.

As I said, I prefer the written word. I’m not as good at thinking on my feet.

Is there something that you wish we had asked or had put down as a topic that we didn’t, that you would like to add here? And you can certainly add or change anything when we send this back. There’s a note on the transcript that you have full creative control. So if you wanted to say something but didn’t, you can type in an entire extra paragraph or extra question, or remove and cut out an entire section.

And  with that, I’ll take the recording and start putting it on a paper and within a couple of weeks, I’ll send you the initial draft and then you can do with it as you wish and send any pictures or anything that relate to things that you talked about and then we’ll get it ready and put it in the queue and eventually you’ll get perhaps a few of your entitled 15 minutes of fame when this goes up. I will add that it goes up on the public side of the of the website so that your family or your friends, anybody can access it and read it.

So if somebody googles names of interviews you’ve done, the links to the interviews come up.

Well, I hope that doesn’t cause you heartburn.

I’ve thought about that as I was phrasing my answers, and changed some passwords so I can include names in the photo captions

I hadn’t thought of that aspect of it, but you’re probably right.

Yeah.

I never know what’s going to touch someone’s concerns.

Well, just to be careful.

(Mark) There’s another thing that even after we publish, we can still edit them years into the future. Everything on the main sites can be changed at any given moment. Also, Fred, just to note, our interviews rank pretty high on the Google rankings. Usually when you Google someone’s name and then NASA, our interviews are near the top of their results, like on the first screen that comes up.

(Fred) Oh, really? I didn’t know that.

(Mark) Yeah. This is a pretty good series, people check it out a lot.

Which means that people googling names are clicking on the interviews and reading them.
(Mark) People read these a lot.

(Fred) The other series I do for the website is “Interesting Fact of the Month”.  Steve Howell suggested that would be a nice addition as we try to attract traffic to the website, and I heard a year or so ago that it was the top item on the code ST website, it got the most hits.

(Mark) Yes, you’ve got spots one and two on your side projects!

(Fred) Well, Sean, I appreciate that you were able to overcome your initial hesitation and take the time to work with us on this and I think you’ll be pleased with how it comes out. Thank you very much for being so organized.

Thank you for your time.

Interview conducted by Fred Van Wert and Mark Vorobets on June 29, 2023

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Ciara C. Fitzpatrick