viernes, 25 de marzo de 2016

QB50p1 FUNcube-3 trasponder encendido

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.
Hola a todos
Hoy, 25 de marzo de 2016, el transpondedor de EO-79 se ha encendido por un período prolongado.
El subsistema de transponder FUNcube en el QB50p1 (EO-79) había sido suministrado por AMSAT-UK y NL AMSAT y es un subsistema similar como el FUNcube-1, pero sin el circuito de downlink de telemetría.

El software actual en el EO-79 experimenta reinicios ocasionales. Cuando suceden estos reinicios, el transponder se apaga automáticamente y tendrá que activarse nuevamente por un comando.
El equipo del FUNcube ha seleccionado unas pocas estaciones de comando para hacerlo, pero se avisa que el transponder puede estar apagado.


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.
El beacon AX25 ha sido seteado  cada 30 segundos en lugar de cada 10 segundos. La frecuencia del beacon es 145.815 khz y consiste de tramas AX25 en BPSK. Mas detalles  en http://isispace.nl/HAM/qb50p.html 
Al igual que en el FUNcube-1, el circuito del oscilador de cristal exhibe deriva con la temperatura. Esto significa que la sintonia manual probablemente funcionará mejor.

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

No hay comentarios:

Publicar un comentario