Date   

Re: ISS SSTV Project Still Running!

Brad Ko6kL
 

many good iss passes for sstv over the holiday, thanks for the heads up on that.


Re: ISS SSTV Project Still Running!

Clint Bradford
 

ARISS SSTV event update:
From an earlier report, the off-time interval between images   is now around 4 minutes. I experienced this myself during today's 15:46 UTC pass over Orlando. 

Dave, AA4KN
ARISS PR


ISS SSTV Project Still Running!

Clint Bradford
 

It really can be as simple as holding your smartphone close to your HT ...

https://www.work-sat.com/sstv.html


AO-91, ‘92 Update

Clint Bradford
 

Update ...


Don’t Forget ISS QSL Card!

Clint Bradford
 

Diplomas a’plenty are available for ISS SSTV reception this current project ... But don’t forget to receive (pun intended) your QSL card from the ISS!

Details here - https://www.work-sat.com/sstv.html


3D printing as related to Ham radio.

Mike Hoblinski
 

After looking at some of the posts for the Raspberry here. One of them used a custom 3D printed
case with a link to the files to print it. I did a search for 3D printed projects related to Ham satellites
and posted a few links below. They range from simple items to rotors to antennas. And if you take it
beyond ham sates its endless. The ability to draw up or modify existing parts is exciting. I purchased
a Creality Ender 3 printer a while back to do a few projects for about 200 dollars. I soon learned that
that was the best 200 dollars I have ever spent on an item I considered a toy. Just like my Ham radio
hobby it has given me many hours of enjoyment. and paid for its self.

Mike
N6IMF
  
Clips    https://www.thingiverse.com/thing:2839035
End Cap  https://www.stlfinder.com/model/arrow-antenna-end-cap-3-4-square-stock-vFWjW9We/2227574/

Elk Rotor          https://www.youtube.com/watch?v=uEpd_ZVcOg4
Arrow Rotor       https://www.youtube.com/watch?v=u9zFE48awh8
Arrow style Ant             https://www.youtube.com/watch?v=4UOFzUX0APQ
Carbon style build    https://tysonpower.de/blog/carbon-arrow-yagi-antenna


Re: AMSAT Sat on this Payload

Clint Bradford
 

Mid-January ... watch for details ...


Re: Do Not Work AO-91 in Elipse!

David Spoelstra
 

Clint is correct. The best policy is to only work AO-91 when it's light outside.

Software that I can verify that show when satellites are in eclipse or not:
PC: GPredict
Android: ISS Detector

-David, N9KT




On Tue, Dec 22, 2020 at 6:22 PM Clint Bradford via groups.io <clintbradford=mac.com@groups.io> wrote:
Hi Folks,

We've been asking users to NOT use AO-91 when it is in eclipse. I've gotten some questions about this, which is great.  Here is a bit of info that is more operational than analytical!

The best way to know if a satellite is in eclipse is to use software.  I use SatPC32 and it shows when a satellite is in sunlight and when it's in the dark (eclipse).  Remember, you can download a demo version limited only by having to enter your info/lat/long each time you start the program.  Surely many other programs indicate eclipse/sunlight as well, but since I don't use them, I can't say for sure.  Maybe there is a list somewhere, or maybe we can build a list here!  (PREDICT does, Gpredict probably does, as I would guess Macdoppler as well?)   There is also a program called ILLUM by DK3WN that is really superb for long term calculations.   Others can chime in (please!) if you know of a program that shows sunlight/eclipse for a satellite.

This is far from perfect, but a good "rule of thumb" for AO-91--if you're in the continental US/Hawaii, and if it's dark outside, the satellite is in eclipse so please don't use it during evening passes.   When it's daytime/daylight at your QTH, then AO-91 is in sunlight and it's OK to use.   This appears to hold true for AO-91 pretty much of the year due to its orbit. If you live at a very northern latitude, things get more interesting ;)

If a satellite seems to linger along the terminator line (day/night line), you're really going to need software to tell you!

Thanks for your help and cooperation.

Hope that helps...

73,


-- 
Mark L. Hammond [N8MH]
AMSAT Director and Command Station


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Re: Do Not Work AO-91 in Elipse!

Clint Bradford
 

Hi Folks,

We've been asking users to NOT use AO-91 when it is in eclipse. I've gotten some questions about this, which is great.  Here is a bit of info that is more operational than analytical!

The best way to know if a satellite is in eclipse is to use software.  I use SatPC32 and it shows when a satellite is in sunlight and when it's in the dark (eclipse).  Remember, you can download a demo version limited only by having to enter your info/lat/long each time you start the program.  Surely many other programs indicate eclipse/sunlight as well, but since I don't use them, I can't say for sure.  Maybe there is a list somewhere, or maybe we can build a list here!  (PREDICT does, Gpredict probably does, as I would guess Macdoppler as well?)   There is also a program called ILLUM by DK3WN that is really superb for long term calculations.   Others can chime in (please!) if you know of a program that shows sunlight/eclipse for a satellite.

This is far from perfect, but a good "rule of thumb" for AO-91--if you're in the continental US/Hawaii, and if it's dark outside, the satellite is in eclipse so please don't use it during evening passes.   When it's daytime/daylight at your QTH, then AO-91 is in sunlight and it's OK to use.   This appears to hold true for AO-91 pretty much of the year due to its orbit. If you live at a very northern latitude, things get more interesting ;)

If a satellite seems to linger along the terminator line (day/night line), you're really going to need software to tell you!

Thanks for your help and cooperation.

Hope that helps...

73,


-- 
Mark L. Hammond [N8MH]
AMSAT Director and Command Station


-----------------------------------------------------------

Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!

View archives of this mailing list at
https://mailman.amsat.org/hyperkitty/list/amsat-bb@...
To unsubscribe send an email to amsat-bb-leave(a)amsat.org
Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org


Do Not Work AO-91 in Elipse!

Clint Bradford
 

AO-91 commanded into TRANSPONDER mode at 1602utc 22 Dec 2020. PLEASE do NOT use in eclipse. 73--Mark N8MH

-- 
Mark L. Hammond [N8MH]
AMSAT Director and Command Station


Kenwood TH-D74 Discontinued?

Clint Bradford
 

Although not true,full-duplex, the ‘D74 is N extraordinary HT.

A source in Japan advises it is discontinued.


Re: AO-91 in Safe mode 12/15 @ 1700 UTC

Clint Bradford
 

Hi folks,

 

It looks like reset 95 put AO-91 into SAFE mode a few hours ago. Just now I cleared the MIN and MAX values, turned on the transponder for a brief minute or so, and then commanded back to SAFE mode.  If you were on the bird during this pass, it should make sense--to observers, the transponder just came up for a minute or so, and then went back off.

 

We'll watch and see what the battery looks like for the next day or two.  Then we'll probably turn the transponder back on and see how it holds up.

 

73,

 

-- 

Mark L. Hammond [N8MH]

AMSAT Director and Command Station    

 

 


Re: SO-50 Milestone

David Spoelstra
 

Yes we did. My FM sats New Year's wish is that Neutron-1 gets commissioned soon and CAS-5A, CAS-7A, CAS-7C, and Tevel get launched and commissioned. If all those happen,
then the loss of AO-91 won't be so bad.
-David, N9KT


On Sun, Dec 20, 2020 at 3:50 PM Clint Bradford via groups.io <clintbradford=mac.com@groups.io> wrote:
Well, we "demanded" more from '91 (and '51) as far as projects and power consumption ...


Re: SO-50 Milestone

Clint Bradford
 

Well, we "demanded" more from '91 (and '51) as far as projects and power consumption ...


Re: SO-50 Milestone

David Spoelstra
 

I wish AO-91 had the batteries SO-50 has!
-David, N9KT


On Sun, Dec 20, 2020 at 10:27 AM Clint Bradford via groups.io <clintbradford=mac.com@groups.io> wrote:
Marking the longest uninterrupted operation of a satellite in space. Today, the Saudi satellite SO-50 marks its 18th year since it was launched in space. 


AMSAT-BB Moved

Clint Bradford
 

AMSAT moved its AMSAT-BB messaging service to a new system. If you haven’t registered, here is the new system -

https://mailman.amsat.org/postorius/lists/


SO-50 Milestone

Clint Bradford
 

Marking the longest uninterrupted operation of a satellite in space. Today, the Saudi satellite SO-50 marks its 18th year since it was launched in space. 


Re: Let's ZOOM This Saturday!

Clint Bradford
 

The launch had been planned for a Virgin Orbit LauncherOne rocket this Saturday, but the launch company posted on Twitter that a COVID-19 case among its crew set back the schedule.

A company representative said a new date hasn't been announced, as the firm still has personnel in quarantine while it does contact tracing among its launch crew.


Re: Let's ZOOM This Saturday!

Clint Bradford
 


Re: Let's ZOOM This Saturday!

Clint Bradford
 

Well, I have been advised the launch is delayed. Stay tuned ...

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