Nothing heard on 18:35 pass right over CN82 and about half the US (did not listen for beacon)
73, Ted K7TRK
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Wouter Weggelaar Sent: Monday, December 28, 2015 1:09 AM To: AMSAT-BB Subject: Re: [amsat-bb] EO-79 transponder activation
Just as a reminder, we will start our second activation today, Monday 28th until Thursday 31st.
The first activation has shown us that the uplink frequency seems to be off by +12kHz, so please adjust your uplink frequencies accordingly. We are also seeing that activating the transponder makes the satellite power negative, meaning the solar arrays can not generate enough power to keep the transponder running permanently. This is not unexpected as the satellite is operating in a different mode than originally anticipated during the design phase.
We are discussing various ways to solve this, including multiple ways of scheduling the transponder operations. With these discussions ongoing we would still like to try the second activation and obtain some more data about the system. We will activate the transponder for as much time as the power budget allows, but please be aware that you may find the transponder to be off while the batteries recharge.
AMSAT keps name: EO-79 Celestrak keps Name: QB50P1 Celestrak file: cubesat.txt NORAD # 40025 COSPAR designator 2014-033-R
*Uplink:* 435.035-435.065 MHz LSB
- 12KhzDownlink:* 145.935-145.965 MHz USB
We kindly request you to share your experiences with the BB so everyone can benefit from operating tips and tricks, as well as being up-to-date on the status. We would also welcome any observation related to the transponder behaviour when the AX.25 beacon comes on.
73 and have FUN
Wouter Weggelaar, PA3WEG AMSAT-NL AMSAT-UK
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