Curious why NASA is delaying such a long time to hand launch the satellite until July? I would think they would want to get it out of there and de-clutter the ISS. Given that it appears to be dead without a solar panel functioning, it seems like an obvious idea to me. Is there some reason why they can't schedule this sooner?
Because it is not NASA's satellite. It is up to the Russians to deploy, and their next scheduled EVA is in July.
-- Dave, W8AAS
On Apr 16, 2011, at 12:27 PM, AB9RN wrote:
Curious why NASA is delaying such a long time to hand launch the satellite until July? I would think they would want to get it out of there and de-clutter the ISS. Given that it appears to be dead without a solar panel functioning, it seems like an obvious idea to me. Is there some reason why they can't schedule this sooner? _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
According to the ARISSAT-1 critical design review, the battery is mission-critical for the first 15 minutes. I assume it has to run the 15-minute timer that delays that start of operation until the bird is some distance from the 'nauts. Based on that info, I would guess it is not viable to launch ARISSAT-1 with a non-operational battery.
Do they have a spare? Depends what you mean. Since it is the same battery that powers the Russian space suits, there are likely some on board. Is that a suit batter that could be used in the satellite? That's a different question. Important as it is to us, I imagine that ARISSAT-1 is not all that important to the ISS partners.
So now I have a question for Tony or others in on the technical details: How was the 70cm transmission from this Yuri's day test supposed to work? Is there an audio output from the ARISSAT-1 to plug into the station's xmitter? Or was the station planning to pick up the 2m transmission and re-broadcast on 70cm? (I'm guessing the latter, which implies that there was probably not even a very weak 2m signal that the ISS receiver right next door could pick up.)
Burns, W2BFJ
On Sat, Apr 16, 2011 at 10:45 PM, Dave Taylor [email protected]wrote:
Because it is not NASA's satellite. It is up to the Russians to deploy, and their next scheduled EVA is in July.
-- Dave, W8AAS
On Apr 16, 2011, at 12:27 PM, AB9RN wrote:
Curious why NASA is delaying such a long time to hand launch the satellite until July? I would think they would want to get it out of there and de-clutter the ISS. Given that it appears to be dead without a solar panel functioning, it seems like an obvious idea to me. Is there some reason why they can't schedule this sooner? _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Burns,
The TM-D700 used the cross band repeater function to listen to the ARISSat 2 meter FM voice, and then rebroadcast it on 70 cm. It was reported to have been used to check the first short test. I do stuff like that in the home shack, even using dummy loads, but then I don't live in a metal can. ;) I do not know exactly how this was lashed up to give a definitive answer.
Alan WA4SCA
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Burns Fisher Sent: Sunday, April 17, 2011 1:34 PM To: AMSAT BB Subject: [amsat-bb] Re: ARISSAT-1 >> Why not launch it now?
According to the ARISSAT-1 critical design review, the battery is mission-critical for the first 15 minutes. I assume it has to run the 15-minute timer that delays that start of operation until the bird is some distance from the 'nauts. Based on that info, I would guess it is not viable to launch ARISSAT-1 with a non-operational battery.
Do they have a spare? Depends what you mean. Since it is the same battery that powers the Russian space suits, there are likely some on board. Is that a suit batter that could be used in the satellite? That's a different question. Important as it is to us, I imagine that ARISSAT-1 is not all that important to the ISS partners.
So now I have a question for Tony or others in on the technical details: How was the 70cm transmission from this Yuri's day test supposed to work? Is there an audio output from the ARISSAT-1 to plug into the station's xmitter? Or was the station planning to pick up the 2m transmission and re-broadcast on 70cm? (I'm guessing the latter, which implies that there was probably not even a very weak 2m signal that the ISS receiver right next door could pick up.)
Burns, W2BFJ
On Sat, Apr 16, 2011 at 10:45 PM, Dave Taylor [email protected]wrote:
Because it is not NASA's satellite. It is up to the Russians to deploy, and their next scheduled EVA is in July.
-- Dave, W8AAS
On Apr 16, 2011, at 12:27 PM, AB9RN wrote:
Curious why NASA is delaying such a long time to hand launch the satellite until July? I would think they would want to get it out of there and de-clutter the ISS. Given that it appears to be dead without a solar panel functioning, it seems like an obvious idea to me. Is there some reason why they can't schedule this sooner? _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
_______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
participants (4)
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AB9RN -
Alan P. Biddle -
Burns Fisher -
Dave Taylor