I can vouch for PSAT and SSTV with PSK however like Bob says it is very hard from the more Northern latitudes. N8URE and I did an experiment last year. I was able to receive waterfall text and some BW SSTV from Maryland and received in Florida. It took many weeks of troubleshooting however.
On Mon, Jul 19, 2021 at 7:28 PM Robert Bruninga [email protected] wrote:
The only downside is that its orbit is at a 28 degree latitude and so is low on the southern horizon for northern states. Though the elevation goes up and down over a two week period by several degrees.
Let me know that it is working. Oh, also, the pass has to be in the sun for power and for live images. bob
On Mon, Jul 19, 2021 at 4:03 PM David Spoelstra [email protected] wrote:
@WB4APR I didn't know that! When I read about the satellite initially I
thought that you only got an SSTV image if someone was transmitting one. I didn't realize that it constantly transmitted what was in it's memory (at least I'm guessing that). I'm going to try that ASAP and let my club know too.
Thanks! -David, N9KT
On Mon, Jul 19, 2021 at 1:43 PM Robert Bruninga [email protected]
We have both. To receive SSTV, the APRS PSAT2 satellite supports it
with an SSTV image once every 4 minutes full time 24/7/365.on 435.350
In addition, users can also uplink their own images to the SSTV
on 29.481 MHz. See how on http://aprs.org/psat2.html
The transponder is also available for PSK31 users. - Bob, WB4APR
On Mon, Jul 19, 2021 at 1:13 PM GMM via AMSAT-BB [email protected]
Best Project first: If you have multiple projects and limited resources, you need to
choose the project that will be the most successful or Get the best bang for the buck.
What are you goals for an Amateur-Radio project for ISS?
#1, Generate interest in Amateur radio capabilities. #2, Encourage Non-Amateur-radio people to possibly get-into the
Amateur-Radio or SWL Hobby.
#3, Get more people excited about the ISS and is open programs that
can allow the average person to participate.
#4, Provide the ISS crew with some entertaining and excitement about
#5, Language universal projects work best.
The APRS project has a low following and does not generate much
excitement or newspaper coverage.
SSTV does great and all 5 of the listed categories. Why is SSTV better the APRS? SSTV is a project that will cross over between two hobbies, Short-wave-listening and Amateur radio. Most Short-wave-listening and Amateur operators are capable of receiving and decoding SSTV signals. With 10's of millions of SWL+AR stations receiving these signals
month, you will see a huge interest in the abilities of Amateur Radio
You must have heard the saying "A picture is worth a thousand words". When MarexMG was running the SSTV Program in Space Station Mir, out
images were showing up in magazines and newspapers around the world.
When was the last time you saw a New paper or magazine story [Non-ham] talking about APRS from ISS? Never!
The MarexMG SSTV project was a huge hit. Schools around the world were setting up receiving stations to receive the images. I remember
a new story showing how the Great-Lakes ices was changing week after
based on images from Mir SSTV.
If we want to build up a large amount of support for existing and
Amateur radio projects on ISS, then we need to put our best project
front and center.
I am not talking about turning on SSTV for 1 or two weekend per year. I am talking about turning it on for a FULL 6 consecutive months in a
row 24 hours a day, 7-days a week.
Image cycle duration: Let's keep is Simple and Safe. Recommended format: To provide the greatest access and reduce Heat stress on the radio, I recommend using SSTV format Robot-36.
The reason for the low-quality Robot-36, is because the transmitting
is only about 36 seconds for each image. I know this is the lowest
image format, but since it’s the shortest, we can keep the radio
All transmitters run MUCH hotter in Zero Gravity! And if the ISS Air pressure is turned down from 14 psi to 10 psi
during space walks], the radio will also run hotter at 10 psi, than
at 14 psi.
Maximum number of ISS-transmitted images per hour. 1 image every 5 minutes or 20 per hour. And depending on heatsink temperature and cooling fan status, we may need to reduce the number of pictures per hour to keep the radio cool.
My goal is to expand the presence of Amateur Radio on ISS and other satellites and the best tools we have on ISS today is Slow Scan TV. Let's generate some worldwide excitement and make this hobby grow.
Turn off APRS!
Turn ON SSTV for a FULL 6 consecutive months in a row 24 hours a day,
7-days a week.
And then start watch the publicly generated by Marex SPACE-CAM1
by Miles, WF1F
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