[amsat-bb] Announcing EO-79 transponder testing for one full orbit

Peter Goodhall peter at m3php.com
Mon May 4 08:41:57 UTC 2015

Thanks for turning it on, I managed to work Mike G0MJW at 08:36 who
was 55 with myself in Oxford IO91JS. as reported in earlier emails did
see quite a bit of fading.


Peter, 2E0SQL

On 4 May 2015 at 09:37, Wouter Weggelaar <wouterweg at gmail.com> wrote:
> Transponder activated at 0830UTC for 95 minutes.
> Wouter PA3WEG
> On Sun, May 3, 2015 at 8:52 PM, Wouter Weggelaar <wouterweg at gmail.com>
> wrote:
>> Hi All,
>> I can hereby confirm Tomorrows intended activation of the AMSAT-NL
>> FUNcube-3 transponder on QB50p1 / EO-79.
>> Date and time:Monday 4th of May, activation around 0830 UTC for one orbit.
>> TLEs are in the normal repositories, COSPAR 2014-033-R, Object# 40025
>> We would like people to try the following frequencies if possible:
>> DOWNLINK: 145.960 USB
>> UPLINK: Tune to match downlink +/- 435.065 LSB
>> The transponder is linear inverting, nominally 30kHz wide, and approx.
>> 500mW output.
>> Also, If you find the transponder busy on those frequencies, feel free to
>> move around and use the entire transponder passband.
>> The passband seems to have a "dip" in the middle which is bigger than
>> expected, but we do welcome feedback about the usability. Also, please
>> limit your uplink power, as it looks like this transponder is as sensitive
>> as FUNcube-1. The spacecraft antenna is a monopole, so we would also be
>> interested in signal fading reports.
>> The comissioning of the transponder done to date is very limited, three
>> activations for 5, 10 and 8 minutes respectively. So your reports are
>> greatly appreciated.
>> We do understand this is a very short notice, but hope that some of you
>> will be able to participate.
>> This was a take-it-or-leave-it opportunity offered by the ISIS engineers
>> for our consideration, and we are again very grateful to ISIS and VKI to
>> give us this opportunity.
>> Wouter PA3WEG
>> FUNcube team
>> On Sun, May 3, 2015 at 12:28 AM, Wouter Weggelaar <wouterweg at gmail.com>
>> wrote:
>>> Dear all,
>>> I would like to inform you all that tomorrow, Monday 4th of may, there is
>>> a fairly high chance we will be allowed to test the AMSAT-NL transponder
>>> for one full orbit.
>>> Details will be made available on short notice, but we are aiming for an
>>> activation starting at ~08:30 UTC and lasting until ~10:10 UTC.
>>> The aim is to characterize the power budget on board EO-79. So we
>>> encourage the usage of this new transponder. Please also report the QSOs
>>> and signal reports to pa3weg at amsat.org
>>> Wouter PA3WEG
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Peter Goodhall, 2E0SQL

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