ISS SSTV June 8-9 145.800 MHz FM
Russian cosmonauts on the International Space Station (ISS) are planning to transmit Slow Scan TV (SSTV) images on 145.800 MHz FM probably using the SSTV mode PD-120.
The transmissions are part of the Moscow Aviation Institute SSTV experiment (MAI-75) and will be made from the amateur radio station RS0ISS in the Russian ISS Service module (Zvezda). This will be the first time the experiment will use the recently installed Kenwood D710GA.
• June 8 Setup and activation 09:45-10:15 GMT, stop about 15:00 GMT*
• June 9 start about 08:35 GMT, stop about 16:15 GMT*
*Dates and times may be subject to change.
The signal should be receivable on a handheld with a 1/4 wave whip. If your rig has selectable FM filters try the wider filter for 25 kHz channel spacing.
You can get predictions for the ISS pass times at https://www.amsat.org/track/
ARISS SSTV Blog https://ariss-sstv.blogspot.com/
Useful SSTV info and links https://amsat-uk.org/beginners/iss-sstv/
m5aka
AMSAT-UK
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ISS SSTV MAI-75 image 9/12 received by Chertsey Radio Club on Baofeng handheld
AMSAT-UK has decided to send a special Platinum Jubilee greetings message via FUNcube-1 (AO-73). Anyone who receives this message and uploads it to the Data Warehouse using the Dashboard can generate a certificate to remember this historic event. 100vw, 300px»></a>The Chair of IARU Region 1 Spectrum Affairs, <strong>Barry Lewis G4SJH</strong>, reports on the work being done in defending the interests of the Amateur Services in the 1240-1300 MHz band.</p>
<p>On the IARU Region 1 site he writes:</p>
<p>During the period May 4-10, 2022, the IARU continued to engage in the preparatory work for WRC-23 agenda item 9.1b in ITU‑R Working Party 4C (WP4C).</p>
<p>Work continued to develop the coexistence studies between the amateur services in the 23cm band and the radio-navigation satellite services (RNSS) operating across the band. New studies were submitted by France, China and the Russian Federation.</p>
<p>The scale of the problem for the amateur services is becoming clear. For example, the studies predict that even a 10W 23cm band station could cause interference to RNSS receivers at up to 30km on the antenna main beam heading. Although the level of amateur activity and the density of users is quite low (compared to other more popular bands) the issue remains that from a regulatory perspective the amateur services are required to not cause harmful interference to RNSS services.</p>
<p>The figure shows a sample of one result from one study submitted into ITU‑R and further illustrates the scale of the problem. In this example a station using an 18dBi gain antenna is used for both narrow band and wideband (ATV) transmissions and a range of power levels. The protection criteria for the RNSS receivers differs for narrowband and wideband interfering signals. The figure shows the distances out from the amateur station where the RNSS protection criteria could be exceeded along the antenna main beam heading.</p>
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https://www.iaru.org/wp-content/uploads/2022/05/IARU-Report-from-WP4C_May-2022.docx
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