[amsat-bb] Re: AO-51 update 22 August 2010
Rick - WA4NVM
wa4nvm at comcast.net
Sun Aug 22 16:10:51 PDT 2010
So far into the 2310z pass.......... nothing. ??
> Hello All,
> According to projections, the next 100% illumination period for AO-51 has
> begun. Hopefully for the next week or two we can run both transmitters ON
> at reasonable power. The PL tone isn't needed (and hasn't been for the
> last few weeks).
> FM Digital PBBS, U
> Uplink: N/A
> Downlink: 435.150 Mhz FM
> FM Repeater, V/U
> Uplink: 145.920 Mhz FM
> Downlink: 435.300 Mhz FM
> Even though AO-51 "sees sunlight" all the time, it doesn't "see" the sun
> equally throughout an orbit. So, we are going to keep the power
> management software running in hopes that we can optimize the transmitter
> power output and keep the battery temperatures down.
> The way it is currently configured, AO-51 can run in one of three states,
> depending on available battery power:
> 1) HIGH 435.300 at 550 mW and 435.150 at 420 mW
> 2) MEDIUM 435.300 at 420 mW and 435.150 at 300 mW
> 3) LOW which currently sets both transmitters effectively to OFF
> It is very likely that users will see the transmitter power going up and
> down some as the battery voltage goes up and down. We hope it's not too
> often, and adjustments will be made after collecting some telemetry over
> the next few days. Our goal has always been to keep it ON and useable as
> much as possible, and we'll do our best to continue that tradition.
> Activity reports over the next few weeks to http://oscar.dcarr.org/ (or
> to me at n8mh AT amsat.org if Ao-51 appears to be OFF) will be very
> much appreciated.
> And finally--telemetry files (KISS format preferred) from around the world
> will be greatly appreciated for the next few weeks!
> On behalf of the AO-51 Command Team,
> Mark L. Hammond [N8MH]
> Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
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