ind224
Member
Suposed to start 13 FEB but the ARISS site does not give a UTC.....I'm listening 437.550.
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ISS SSTV special event 13 FEB -17 FEB
- Thread starter ind224
- Start date
SSTV Simulation details:
Hardware: ARISS radio transmitter set to low power (5 watts vs. 25 watts for previous SSTV events). This is to simulate the challenges and unknowns of a new radio system on a Dragon capsule that might be in an unfavorable attitude in some parts of the mission flight path.
Operations Frequency: 437.550 MHz. Using the SSTV (public downlink) planned for Fram2Ham, ground users can practice the more challenging 70 cm Doppler correction.
SSTV Mode: PD120. The longer image capture for this simulation (120 seconds, vs. 36 seconds for Fram2Ham’s Robot 36 SSTV mode) will allow ground users to hone their signal polarization switching skills (manually and electronically) as well as precise antenna pointing.
Operations Duration: February 13 (World Radio Day) to February 17, 2025. This long duration, over a weekend, will allow users multiple passes to practice, learn lessons, make corrections, and try again.
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ind224
Member
As stated in the mission statement, this is not going to be a cake walk and is indeed a low signal test. With 5 different radios and antenna combos the last pass was over 82* and I got about 5 seconds of what was good enough to get MMSSTV to decode. It's only 12*F here so I choose not to go outside with a 3 element /hand held/Robot 36 combo that would certainly help.
devicelab
Whacker Extraordinaire
Got it just now. It decided to stop just as it was approaching maximum signal but it restarted quick enough for me to grab an OK image. Will post after the deadline.
I used RX-SSTV since it has the dedicated PD120 mode. Didn't take any setup really. Just make sure the sound input is correct. If using an SDR make sure you do use the audio filter. (It needs normal audio -- not discriminator audio.)
I used RX-SSTV since it has the dedicated PD120 mode. Didn't take any setup really. Just make sure the sound input is correct. If using an SDR make sure you do use the audio filter. (It needs normal audio -- not discriminator audio.)
Today's were really low passes over Toronto. Good passes were at 6 am... We've had clear skies, but hard to get a decent signal. I managed to get about a third of one that was properly formatted so you could see what the image is before it fuzzed off. I'd normally be in the schoolyard next door, but school's on today, so in the tree-filled backyard, knee-high snow. I think that's enough for today. See how it goes over the weekend
