Hi,
Recently I've been listening to Echo AO-51 on 435.150 MHz., and looking at some of the data in the KE4AZN telemetry archive.
I've found a lot of information about the satellite, on the web, but still have a few questions.
Is there a schedule of the sequence of when the various types of data packets are transmitted? Looking at the archived data TLM appears to be transmitted every 15 seconds.
Some of the packets I've received, mention WOD. Is there a schedule for WOD capture and transmission? Is the WOD archived any where?
Any help would be greatly appreciated.
73 Clive G3CWV
Hitchin, North Hertfordshire, UK.
Hi Clive,
The telemetry from AO-51 is generally downlinked all the time except when the second transmitter isn't running another mode.
I change the rate that the telemetry is collected and transmittted, mainly for WOD. Since the new software was uploaded in early 2007, the PHT time doesn't always reflect the rate, there is another value that we set as a multiple of the PHT. So generally I have been using 2*PHT, for a 30 sec rate. Every week or so I change the rate to 5 sec for an orbit to get a good time handle on the eclipse time.
I generally have the WOD running and stored in a daily WOD file that normally could be downloaded from the BB using WiSP. Unfortunately, we have an issue with the BB open and access via the SQRX. We are attempting to improve this, but there is only one person that can change the software in this section. So the BB is not available for general use at this time.
I will be happy to send you some current WOD, let me know what you would like. We don't have an WOD server setup at this time, but I am working on this.
I will send you a 24 hour WOD in csv format.
Let me know if you have any questions.
Best Regards, Gould, WA4SXM AO-51 Command Station
----- Original Message ----- From: "Clive Wallis" clivew@zetnet.co.uk To: amsat-bb@amsat.org Sent: Friday, August 17, 2007 7:20 AM Subject: [amsat-bb] AO-51 Telemetry & WOD
Hi,
Recently I've been listening to Echo AO-51 on 435.150 MHz., and looking at some of the data in the KE4AZN telemetry archive.
I've found a lot of information about the satellite, on the web, but still have a few questions.
Is there a schedule of the sequence of when the various types of data packets are transmitted? Looking at the archived data TLM appears to be transmitted every 15 seconds.
Some of the packets I've received, mention WOD. Is there a schedule for WOD capture and transmission? Is the WOD archived any where?
Any help would be greatly appreciated.
73 Clive G3CWV
Hitchin, North Hertfordshire, UK.
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
Hi Gould,
Many thanks for your prompt & helpful reply.
The telemetry from AO-51 is generally downlinked all the time except when the second transmitter isn't running another mode.
OK. I'm only getting a few TLM frames per pass, but lots of the short messages, so I suspect that my reception isn't good enough to see the longer TLM frames.
So the BB is not available for general use at this time.
Hopefully, I'll be able to try it sometime, although I may need to get some new gear :-(.
I will be happy to send you some current WOD, let me know what you would like. We don't have an WOD server setup at this time, but I am working >on this.
Thanks, I'll contact you about this, directly.
73
Clive G3CWV
Hitchin, North Hertfordshire, UK.
participants (2)
-
Clive Wallis -
Gould Smith