[amsat-bb] EO-79 transponder ACTIVE
py5lf at falautomation.com.br
Fri Mar 25 15:13:09 UTC 2016
We had a nice QSO few minutes ago on a high pass over here , PY5LF, PY2RN ,
PU2RAS , very good signal .
I'm using 13kHz above on the uplink to match ;
2016-03-25 12:08 GMT-03:00 Paul Stoetzer <n8hm at arrl.net>:
> By the way, I'd transmit 10-12 kHz up from where you expect to be
> based on Doppler calculations. I think I was around 12-15 kHz higher
> than nominal.
> Paul, N8HM
> On Fri, Mar 25, 2016 at 10:53 AM, Paul Stoetzer <n8hm at arrl.net> wrote:
> > Lots of ditters, but only heard and worked WB8RJY on the 1437Z pass
> > over eastern North America. Lots of QSB, but strong signals otherwise
> > on the 15 degree pass.
> > I'll be on the next pass at 1612Z as well.
> > 73,
> > Paul, N8HM
> > On Fri, Mar 25, 2016 at 6:14 AM, Wouter Weggelaar <wouterweg at gmail.com>
> >> Hi All,
> >> Today, 25th of March 2016, the EO-79 transponder has been turned on
> >> for a prolonged period.
> >> The FUNcube transponder subsystem on QB50p1 (EO-79) had been provided
> >> by AMSAT-UK and AMSAT-NL and is a similar subsystem as on FUNcube-1,
> >> but without the telemetry downlink circuitry.
> >> The current software running on EO-79 does experience occasional
> >> reboots. When these reboots happen, the transponder is automatically
> >> turned off and will have to be turned back on by a command station.
> >> The FUNcube team has selected a few command stations to do so, but be
> >> advised the transponder may be off.
> >> TLEs:
> >> AMSAT keps name: EO-79
> >> Celestrak keps Name: QB50P1
> >> Celestrak file: cubesat.txt
> >> NORAD # 40025
> >> COSPAR designator 2014-033-R
> >> Frequencies:
> >> Uplink: 435.035-435.065 MHz LSB
> >> Downlink: 145.935-145.965 MHz USB
> >> EO-79 has been set to only beacon the normal AX.25 beacon every 30
> >> seconds instead of 10 seconds. The beacon frequency is 145.815MHz and
> >> consists of AX.25 frames on BPSK. more details about the downlink can
> >> be found on the ISIS HAM page at http://isispace.nl/HAM/qb50p.html
> >> Just like FUNcube-1, the crystal oscillator circuits exhibit drift
> >> with temperature. This means manual tuning will probably work best.
> >> Lastly, the commanding team availability will be limited over Easter,
> >> so please report the transponder being on or off on the status page of
> >> AMSAT: http://www.amsat.org/status/
> >> It does not appear in the table, but it does in the reporting drop-down.
> >> 73 and have FUN
> >> Wouter Weggelaar, PA3WEG
> >> AMSAT-NL
> >> AMSAT-UK
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