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.
On Fri, Mar 25, 2016 at 10:53 AM, Paul Stoetzer [email protected] 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.
On Fri, Mar 25, 2016 at 6:14 AM, Wouter Weggelaar [email protected] wrote:
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 _______________________________________________ Sent via [email protected] AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb