Hi Jack and others,
Many thanks for the confirmation that the FUNcube transponder on UKube-1 is still performing "as advertised"!
There are presently three FUNcube transponders operating for your pleasure over the festivities as detailed below:)
The latest telemetry from AO73/FUNcube-1 and FUNcube-2 on UKube can always be seen here http://warehouse.funcube.org.uk/ and from EO88/Nayif-1 here http://data.amsat-uk.org/nayif1/index
73 Graham G3VZV
AO-73 FUNcube-1 The transponder is normally operational only when the satellite is in eclipse, ie the solar panels are NOT being illuminated. During weekends (from pm Fridays UTC to PM Sundays UTC), AND OVER THE CHRISTMAS HOLIDAYS, the transponder is operational 24/7. When the transponder is switched off, the telemetry beacon is on full power, when the transponder is on the beacon it is on low power. The nominal transponder frequencies are: Uplink: 435.150 – 435.130 MHz LSB (Inverting) Downlink: 145.950 – 145.970 MHz USB Telemetry Tx: 145.935 MHz BPSK (The passband may be up to 15kHz higher depending on on-board temps. Lower temperatures give higher freqs!)
FUNcube-2 (aka FUNcube on UKube) The FUNcube-2 sub-system continues to operate autonomously and, almost continuously, in amateur mode. The transponder is operational and the telemetry downlink is functioning with about 70mW output. The FUNcube-1 Dashboard does not correctly display the telemetry but it does correctly decode the data and uploads it to the FUNcube Data Warehouse from where it can be examined. The FUNcube standard real time data channels are operational in addition to the battery voltages, temperatures and ADCS data coming via the main On Board Computer (OBC). The transponder is interrupted for a few seconds every 2 minutes when the other transmitter sends its CW beacon and, occasionally, for a few seconds when the main OBC reboots (approx seven times each orbit). The nominal transponder frequencies are: Uplink: 435.080 – 435.060 MHz LSB (Inverting) Downlink: 145.930 – 145.950 MHz USB Telemetry Tx: 145.915 MHz BPSK (The passband may be up to 10kHz higher depending on on-board temps. Low temperatures give higher freqs!)
EO88/Nayif-1/FUNcube-5 EO88 is presently operating in autonomous mode. The transponder is operational when the satellite is in eclipse, ie the solar panels are NOT being illuminated. When the transponder is switched off, the telemetry beacon is on full power, when the transponder is on the beacon it is on low power. The transponder frequencies are: Uplink: 435.045 – 435.015 MHz LSB (inverting) Downlink: 145.960-145.990 MHz USB Telemetry Tx: 145.940MHz
On 22/12/2017 22:04, jack weimer wrote:
Ukube-1 transponder is working. I just had a contact with AA5PK Glenn in DM91 grid at 2127 Z when the beacon comes on it distorts the transponder downlink so you have to wait until the beacon quicks in order to hear the transponder downlink JACK KC7MG _______________________________________________ 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