Yes, GS of JARL passed at last some command to FO-29, now use only for examination and only over Japan.
Tomorrow, JARL will comment the present condition of FO-29, so I will translate it and post it to amsat-bb.
de JE9PEL, Mineo Wakita
OK Mineo,
Tank you again for this information.
I monitored orbit 52901 of FO-29 over the Atlantic and Europe but obviously as you explain nothing was heard on the beacon and passband.
Waiting for your prompt replay tomorrow about any good news !
73" de
i8CVS Domenico
----- Original Message ----- From: "Mineo Wakita" ei7m-wkt@asahi-net.or.jp To: nachif@terra.com.br Cc: amsat-bb@amsat.org Sent: Friday, May 04, 2007 5:31 PM Subject: [amsat-bb] Re: FO-29
Yes, GS of JARL passed at last some command to FO-29, now use only for examination and only over Japan.
Tomorrow, JARL will comment the present condition of FO-29, so I will translate it and post it to amsat-bb.
de JE9PEL, Mineo Wakita
Sent via AMSAT-BB@amsat.org. 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
Quoting Mineo Wakita ei7m-wkt@asahi-net.or.jp:
Yes, GS of JARL passed at last some command to FO-29, now use only for examination and only over Japan.
Tomorrow, JARL will comment the present condition of FO-29, so I will translate it and post it to amsat-bb.
de JE9PEL, Mineo Wakita
Alongside my excitement at FO-29 breathing again, I'm intrigued by the ability of these Japanese birds to operate over Japan, thereby conserving power. The cubesats also do this, making me wonder the mechanism behind it. Is this GIS technology? (The Kiwisat folks had some trouble finding affordable GIS modules for space, if I remember correctly.) Or is there a more simple approach at play?
73, Bruce VE9QRP
Bruce Robertson wrote:
I'm intrigued by the ability of these Japanese birds to operate over Japan, thereby conserving power ... Is this GIS technology ... >or is
there a more simple approach at play?
The usual approach is "don't speak unless spoken to". A command receiver operates continuously on board the spacecraft, but the transmitter, transponder or other high power payload only turns on in direct response to commands and then turn itself off some short time later.
-Joe KM1P
Quoting Joe Fitzgerald jfitzgerald@alum.wpi.edu:
Bruce Robertson wrote:
I'm intrigued by the ability of these Japanese birds to operate over Japan, thereby conserving power ... Is this GIS technology ... >or is
there a more simple approach at play?
The usual approach is "don't speak unless spoken to". A command receiver operates continuously on board the spacecraft, but the transmitter, transponder or other high power payload only turns on in direct response to commands and then turn itself off some short time later.
-Joe KM1P
In my original question I mistyped GIS for *GPS*; what I wondered was if these birds 'knew' their position by GPS satellite readings. It seems most believe that they don't, that a groundstation in Japan gives a wakeup transmission.
73, Bruce VE9QRP
In my original question I mistyped GIS for *GPS*; what I wondered was if these birds 'knew' their position by GPS satellite readings. It seems most believe that they don't, that a groundstation in Japan gives a wakeup transmission.
73, Bruce VE9QRP
Bruce,
Yes, some do, although not FO29.
I'm pretty sure NASA sponsored a GPS system experiment on AO40 and that this was the first GPS system to fly *outside* the ring of GPS satellites. I *think* I can remember an AMSAT bulletin reporting the success of the experiment.
Space Today list three amateur satellites as carrying GPS but don't include AO40. Space today lists: PoSAT-OSCAR 28, Thai-Microsat-OSCAR 31, CanX1 See: http://www.spacetoday.org/Satellites/Hamsats/AmateurSatLaunchTable.html
Sil
participants (5)
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Bruce Robertson -
i8cvs -
Joe Fitzgerald -
Mineo Wakita -
Sil - ZL2CIA