ARLA/CLUSTER: Já estão no Espaço; 7 CubeSat e 1 Microsat.

[João Gonçalves Costa]

Já estão no espaço !
Aos 9 mn (10:09 UTC) já estava a 264 km de altura e a 7,87 km/s.
Vejam a simulação no Orbitron, comparada com o video ao vivo:
http://www.qsl.net/py4zbz/vega.htm

73 de Roland.

Vega launch success - satellite signals heard

The first Vega, flight VV01, lifted off at 1000 UT February 13 from the ESA Spaceport at Kourou in the Caribbean carrying eight student built amateur radio satellites and the LARES Laser Relativity Satellite into orbit.

At 1153 UT, shortly after the satellites had been deployed, Drew Glasbrenner KO4MA reported hearing signals as they went past Florida.

Signals were first heard in the United Kingdom at around 1207 UT.

In Germany Mike Repprecht DK3WN copied the satellites at an elevation of just 3 degress at 1209 UT, see http://www.dk3wn.info/p/?cat=83


A recording of PW-Sat made by Wouter Weggelaar PA3WEG at 1207 UT can be heard at
http://www.pa3weg.nl/pa3weg/recordings/PW-SAT%20recording%20PA3WEG%2013-02-2012_1207UTC.mp3


Nittin Muttin VU3TYG received PW-Sat at 1246 UT as it travelled over India, his recording is at 
http://vu3tyg.addr.com/pwsat/pw_sat-%20Feb%2013th.mp3


In Sudan Nader ST2NH received signals from AlmaSat-1 and Masat-1.

As of Monday evening, February 13, signals had been reported from AlmaSat-1, Goliat, Masat-1, PW-Sat, UniCubeSat and XaTcobeo.

All the Vega amateur radio satellite project teams used the IARU amateur satellite frequency coordination panel service. The great benefit of IARU coordination was that all the different UHF satellite signals could be simultaneously captured within the typical 192 kHz bandwidth of modern Software Defined Radios (SDRs).

PW-Sat is the only satellite with a downlink in the 145 MHz band. Its 1200bps BPSK signal on 145.900 MHz is receiveable with an SSB radio and an omni-directional antenna. When PW-Sat has finished its primary scientific mission it will be reconfigured as a 435/145 MHz FM to DSB transponder for general amateur radio communications. The FM to Double Sideband transponder was first pioneered by amateurs on the satellite AO-16.

The other amateur radio satellites have downlinks in 437 MHz. A small
430 MHz band Yagi antenna may be used to receive the signals.

The Masat-1 satellite team have made available software to decode their 437.345 MHz telemetry data via a PC sound card. The software can be downloaded from
http://cubesat.bme.hu/en/foldi-allomas/kliens-szoftver/


Watch the launch of Vega VV01


Student amateur radio satellite downlink frequencies:
(Worst case Doppler shift during pass +/-9 kHz at 437 MHz and +/-
3 kHz at 145 MHz)

+ AlmaSat-1 437.465 MHz 1200 bps FSK, 2407.850 MHz
+ E-St  r 437.445 MHz 1200 bps AFSK
+ Goliat 437.485 MHz 1200 bpx AFSK
+ Masat-1 437.345 MHz 625/1250 bps GFSK, CW
+ PW-Sat 145.900 MHz 1200 bps BPSK AX25, CW
+ Robusta 437.325 MHz 1200 bps FM telemetry - one data burst of 20 secs every 1 min (may be 437.340 MHz)
+ UniCubeSat 437.305 MHz 9600 bps FSK
+ XaTcobeo 437.365 MHz FFSK with AX.25

The prelimary TLEs, used by tracking software to predict the orbits, were generated by a team lead by Paolo Tortora at the University of Bologna in Italy. They proved to be accurate with the satellites appearing at the expected time.

Satscape Free Satellite Tracking Software
http://www.satscape.info/home/?q=node/2


Preliminary Vega TLE's for use in satellite tracking software
http://aribra.it/satelliti/estar.txt


Website URLs for the student satellite are at 
http://www.uk.amsat.org/4180


IARU Amateur Satellite Frequency Coordination Panel hosted by AMSAT-UK http://www.amsat.org.uk/iaru/


AMSAT-UK http://www.uk.amsat.org/