Archivo de la etiqueta: communication

SSTV from the ISS in July

ARISS SSTV event from the International Space Station will begin no earlier than July 14 with the expectation that the event will run through the weekend into the beginning of the following week.

This is all subject to Axiom Mission AX-4 schedule and other operational considerations. AX-4 is expected to depart from ISS on Monday, July 14 at 11:05 GMT (12:05pm BST)

The subject will be the 50th anniversary of the Apollo-Soyuz Test Project (ASTP) and the 40th anniversary of STS-51F.

STS-51F was the second SAREX flight and had the first use of SSTV in human spaceflight.

Start: Monday, July 14 0945 GMT (10:45am BST), may be later due to AX-4
End: Sunday, July 20 1800 GMT (7pm BST)

Frequency: 145.800 MHz FM (+/-3.5 kHz Doppler Shift)
SSTV Mode: PD120 (Transmission cycle 2 minutes on, 2 minutes off)

You are invited to upload decoded images in the ARISS gallery, area “ARISS Series 28 Apollo Soyuz and STS-51F” at: https://ariss-usa.org/ARISS_SSTV/

Once you’ve submitted, just clicking on the dedicated button you can apply for the official ARISS SSTV award.

Also, you can request the ARISS QSL by contacting the European QSL bureau: https://www.ariss-eu.org/index.php/ariss-station/european-qsl-bureau

To support everyone interested in such events, the European Space Agency released tutorials about how to receive pictures transmitted over amateur radio by the International Space Station: you can find them on https://issfanclub.eu/2024/11/08/esa-tips-how-to-get-pictures-from-the-international-space-station-via-amateur-radio-2/

It’s always possible to receive the ISS SSTV signal by using the WebSDR at the Goonhilly Earth Station, the audio can then be fed into your PC or Smartphone SSTV App  https://vhf-goonhilly.batc.org.uk/

Follow @ARISS_intl on X for official updates, since changes can occur.

Reminder, the images are sent on a (roughly) 2 minutes on, 2 minutes off schedule. So if you don’t hear anything, give it 2 minutes!

Many FM rigs can be switched been wide and narrow deviation FM filters. For best results you should select the filter for wider deviation FM. Handhelds generally have a single wide filter fitted as standard.

You can get predictions for the ISS pass times at https://www.amsat.org/track/

Useful information on receiving the pictures and links for Apps to display the pictures can be found here:
https://amsat-uk.org/beginners/iss-sstv/

You may be able to get publicity for the amateur radio hobby if you contact your local newspaper and tell them you’ve received a picture (doesn’t have to be perfect) from the International Space Station, see
https://amsat-uk.org/2015/02/04/iss-sstv-in-uk-press/

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AMSAT-UK Support Student Payload on Sub Orbital Launch from Oman

Stellar Kinetics Kia-1 and support teams at Etlaq Spaceport Oman

Jovian-O and pod at Surrey university for vibration testing

Students integrating the Jovian-O 6U payload

Follow @EtlaqSpace and @stellarkinetics on X

Duqm-2 launch https://www.etlaq.om/launches/duqm-2

University of Surrey https://www.surrey.ac.uk/news/uk-students-launch-international-space-mission

Space South Central – Joint Universities Programme for In-Orbit Training, Education and Research https://www.spacesouthcentral.com/jupiter

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Amateur Radio Satellites in TES Magazine

International Space Station – Image credit NASA

Amateur radio can open up a new world of opportunities for students, says teacher Chris Aitken MM0WIC, @skipperAitken on X, who shares his tips on how to start a club in the Times Educational Supplement – TES Magazine.

“In 2023 I officially started the Wick High School Radio Club, with a callsign of GM0WHS. The aim of the club was to expose our students to the wide range of activities available in amateur radio.

I remember our first activity: talking to another amateur in England via the SO-50 satellite. I stood with three students on the rugby pitch, antennas pointing to the sky and talking to another amateur, Nick M1DDD.

By the end of the contact, we had 30 students around us wondering what was going on. Their curiosity sparked, we answered questions on what we were doing and invited them to take part.”

Read the TES magazine article at
https://www.tes.com/magazine/teaching-learning/general/why-i-started-amateur-radio-club-my-school

https://www.essexham.co.uk/train/book-a-place/

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Use of 430-440 MHz by AST SpaceMobile constellation

Image by PE0SAT of 435.900 MHz downlink received Sept 12, 2024

AST & Science LLC (AST SpaceMobile) currently have five Bluebird satellites, launched 12 September 2024, in Low Earth Orbit using the amateur radio 430-440 MHz band, see
https://community.libre.space/t/asts-bluebird-1-5/12255

These amateur frequencies are used for the uplink and downlinks with up to 50 kHz bandwidth 430.5, 432.3, 434.1, 435.9 and 439.5 MHz.

AST say they have ground stations in Australia, Argentina, Bulgaria and Korea.

They are planning to launch a further 243 satellites also using 430-440 MHz and in February submitted a request for use of those amateur frequencies to the FCC Space Bureau
https://apps.fcc.gov/els/GetAtt.html?id=371448&x=.

In April the FCC responded with these questions to AST
https://forum.amsat-dl.org/cms/index.php?file-download/7502/

AST’s responded in May to the FCC questions regarding their filing, see answer regarding IARU
https://apps.fcc.gov/els/GetAtt.html?id=376295

The Interference Analysis Report submitted by AST in their answer doesn’t mention the interference that would be caused from the 430-440 MHz transmissions, see
https://apps.fcc.gov/els/GetAtt.html?id=373778&x=.

FCC issued this Public Notice in June – comment to FCC by July 21
https://www.fcc.gov/document/space-bureau-accepts-filing-ast-science-llc-application

For some background on FCC attitudes see the interview the Chief of the FCC’s Space Bureau, Jay Schwarz, gave to the American Enterprise Institute (AEI). It primarily concerns the ITU-R EPFD limits but it reflects the new thinking at the FCC about getting rid of “outdated assumptions about system design and spectrum use”
https://www.aei.org/technology-and-innovation/how-the-fcc-space-bureau-is-rethinking-the-rules-of-space/

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ISS Contact with Dublin Students

Takaya Onishi KF5LKS on the International Space Station.

The contact is scheduled for Wednesday, June 4, at 12:10 UTC (1:10 PM BST) via EI1ISS.

The contact on 145.800 MHz FM +/- 3.5 kHz Doppler should be receivable outdoors in the British Isles and Western Europe using just handheld radio and 1/4 wave whip.

Many amateur FM radios can be switched been wide and narrow deviation FM filters, usually marked FM-N (narrow) and FM. For best results you should select the filter for wider 5 kHz deviation FM. Handhelds generally have a single wide filter fitted as standard.

Don’t have a radio for 145.8 MHz?  Use your phone to tune in online using the GoonhillyWebSDR radio https://vhf-goonhilly.batc.org.uk/

A live video feed of the event is planned, check the ARISS YouTube channel at https://www.youtube.com/@ARISSlive

For the latest information follow ARISS on X: https://x.com/ARISS_Intl

Follow Takaya Onishi on X: https://x.com/Astro_Onishi

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