Hej!
Dagens nät med deltagare
SM4EFW
SM4JLX
SM5HL
SM6NZV
SM7WSJ
* STRaND-1 hörs igen
STRaND-1 Heard After 113 Days of Silence
Graham Shirville, G3VZV, announced on the AMSAT-BB that Mike DK3WN
has just reported hearing STRaND-1 and decoding telemetry this
evening. The spacecraft has been silent since March 31st so this is
really good news.
I am certain that the project leader, Dr Chris Bridges, who
presented a paper about STRaND-1 at the AMSAT-UK Colloquium last
Sunday, would be really pleased to receive any and all reports from
other amateurs around the world.
Mike has an info page about this spacecraft here:
http://www.dk3wn.info/sat/afu/sat_strand.shtml
STRaND-1 transmits on frequency of 437.568 MHz (+/- 10 kHz Doppler)
Please send your reports to C.P.Bridges at surrey.ac.uk
*Satellitbyggare
http://amsat-uk.org/2013/07/25/interns-build-a-cubesat/
*Mer transpondersatteliter på väg upp.
Det verkar som att vi under kommande år kommer att få mycket nytt att lyssna
på samt aktivera.
QB50: Ham Radio transponder payloads to launch 2014
It was announced during the QB50 presentation at the AMSAT-UK
International Space Colloquium that
two CubeSats, carrying SSB/CW and FM voice transponders should be
launched into a 600 km orbit in the first half of 2014
The QB50 project team has announced that on July 19, 2013 they
signed a Memorandum of Understanding with AMSAT-UK, AMSAT-
Francophone, and AMSAT-NL to enable two amateur radio payloads to fly
on two 2-Unit CubeSats in the first half of 2014.
These precursor CubeSats, which have still to be named, will be
placed into a conventional 600 km 98o orbit in advance of the main
mission. This allows for the testing of key satellite and payload
components ahead of the full QB50 mission.
In addition, the precursor mission allows for experimentation and
validation of operational concept of the QB50 mission. Next to these
objectives the amateur radio payloads will be operated as well. At
the beginning of the mission, the various payloads onboard the
spacecraft will be operated in an alternating fashion, whilst the
amateur radio payloads will be operated as the primary payload of the
spacecraft once all QB50 related experimentation has been concluded.
The main mission of QB50 has the scientific objective to study in
situ the temporal and spatial variations of a number of key
constituents and parameters in the lower thermosphere (90-320 km)
with a network of about 40 double CubeSats.
These, university built, CubeSats will be launched into a 320km
circular orbit, will be separated by a few hundred kilometres and
carry identical science sensors. The sensors will monitor parameters
that will greatly increase our knowledge and understanding of this
little explored region of the E and F layers of the Ionosphere.
QB50 will also study the re-entry process by measuring a number of
key parameters during re-entry and by comparing predicted and actual
CubeSat trajectories and orbital lifetimes.
The AMSAT-Francophone (AMSAT-F) payload for one of the satellites
will be an FM voice relay with VHF uplink and UHF downlink. It will
also transmit FX25 telemetry at 9.6kbit. This secondary payload will
be also used in several satellites in the main constellation as their
main receiver and transmitter.
The AMSAT-NL payload, on the other precursor satellite, will
incorporate an SDR based, linear, V/U, transponder core and is being
designed to allow the uploading of firmware updates to enable
enhanced performance and functionality. It will also provide a
telemetry downlink at 1.2kbit using FUNcube compatible BPSK
modulation.
The QB50 spacecraft in the main, short duration, mission will,
generally, have downlinks operating on frequencies in the 435-438 MHz
Amateur Satellite Service allocation and some are expected to use
2.4GHz.
They will be notified to the ITU as a Belgian network after having
been coordinated by the IARU Frequency Coordination Panel. Some of
these will also, on occasions, act as FM voice relays during their
missions.
Watch the video of the QB50 Presentation at the 2013 AMSAT-UK
International Space Colloquium
http://www.batc.tv/streams/amsat1308
Direct video download http://www.batc.tv/vod/qb50.flv
More information about the QB50 project can be found at
http://www.qb50.eu/
Vi hörs på 3740 KHz även nästa vecka.
73 Håkan SM7WSJ
