Re: RS-38 or RS-28?
All I can do is reproduce the exact text I have received. I'm told convincingly that the cw sent is RS 28 and not 38 but I haven't been listening for it myself. DK3WN's observations are the best that I know of.
I understand that DOKA can use two frequencies multiplexed for a higher throughput : see my page on RS-30 at:
http://sites.google.com/site/andythomasorg/amateur-satellites/rs-30-yubilein...
so I would expect that the two frequencies I have been given are centre frequencies for two ranges, each capable of being chosen from the ground station, depending on local qrm.
I imagine that the main ground station is at Moscow state university with a back up at Plis at Kaluga, who invented Doka.
Other participating universities within the Russian Federation will also have a DOKA groundstation (which may or may not be compatible), but the main telemetry of the scientific payloads will be on 1.7 GHz, so I don't expect you will hear DOKA if you are outside the footprint of >10 degrees elevation from Moscow (it will be interesting if you do).
Worldwide, I expect that the 435 MHz beacon when its frequency settles down is now just a CW beacon of housekeeping data. And it is pretty likely that the cw decode for the beacon is the same as rs-30 on my webpage.
73 de andy g0sfj
Andy,
CW telemetry is similar, but not identical
rs30 us160 ibs12 usun0 isun0 itxa8 itxb1 ttxa65 ttxb66 tnap80 tab66 msep0 mcon53 sma83 smb63 mrxa2 mrxb2 rs30 us159 isb12 usun1 isun0 itxa8 itxb0 ttxa65 ttxb66 tnap80 tab66 msep0 mcon53 sma86 smb71 mrxa2 mrxb2
rs28 ubs164 uaba166 uabb166 ibs3 iaba126 iabb126 ispa0 ispb126 taba133 tabb131 tsep136 mcon69 sma138 smb100 mra6 mrb30 rs28 ubs164 uaba172 uabb177 ibs2 iaba134 iabb134 ispa5 ispb133 taba132 tabb131 tsep136 mcon69 sma93 smb82 mra6 mrb30
73, Mike
-----Ursprüngliche Nachricht----- Von: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] Im Auftrag von andy thomas Gesendet: Sonntag, 27. September 2009 12:50 An: amsat Betreff: [amsat-bb] Re: RS-38 or RS-28?
All I can do is reproduce the exact text I have received. I'm told convincingly that the cw sent is RS 28 and not 38 but I haven't been listening for it myself. DK3WN's observations are the best that I know of.
I understand that DOKA can use two frequencies multiplexed for a higher throughput : see my page on RS-30 at:
http://sites.google.com/site/andythomasorg/amateur-satellites/rs-30-yubilein y
so I would expect that the two frequencies I have been given are centre frequencies for two ranges, each capable of being chosen from the ground station, depending on local qrm.
I imagine that the main ground station is at Moscow state university with a back up at Plis at Kaluga, who invented Doka.
Other participating universities within the Russian Federation will also have a DOKA groundstation (which may or may not be compatible), but the main telemetry of the scientific payloads will be on 1.7 GHz, so I don't expect you will hear DOKA if you are outside the footprint of >10 degrees elevation from Moscow (it will be interesting if you do).
Worldwide, I expect that the 435 MHz beacon when its frequency settles down is now just a CW beacon of housekeeping data. And it is pretty likely that the cw decode for the beacon is the same as rs-30 on my webpage.
73 de andy g0sfj
_______________________________________________ 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
The utility of OSCAR numbers as a primary naming reference has long past.
For the past several years I think we should be referring to the new plethora of small sats by their NAME and not by their oscar number. Of course they still get oscar numbers and OSCAR numbers are still a real badge of honor, and point of pride but they are no longer practical as a naming convention for keeping track of all the things we have up there.
Who remembers what OSCAR 45 was? Or now, the difference between AO79, KO98, or PO77? Or what was AO43 or 45?
I suggest that we encourage a "common_name [?O-##]" convention. We tried to encourage this by always referring to PCSAT as PCSAT (NO44) back in 2001. Heck, I don't even remember the number for my own RAFT satellite without going back and looking it up. I was very proud to get these OSCAR numbers, but to me, they are and always will be PCSAT and RAFT, the 44th and 4?th Amateur Oscar satellites. Of course owners are free to choose whatever naming they prefer, but they should not be lead to believe by defualt that once they get an OSCAR number that their favorite nickname will disappear...
These satellites have unique and interesting personalities. They are NOT just numbers. Just seralizing them leads to the sterotyping by grumpy OM's as just a bunch of bleepsats, when in fact, they are labours of love, with all kinds of experiments and sometimes quirks with deep ties to their teams and operators who have carefully named them with pride.
Just my $2 worth.
Bob, WB4APR
participants (3)
-
andy thomas -
Mike Rupprecht -
Robert Bruninga