ARLA/CLUSTER: São transmidores senhores, são transmissores no espaço

[João Costa > CT1FBF]

 HamTV transmitter launched to ISS

On Saturday, August 3 at 1948 UT, the Japanese *HTV-4* cargo vessel was
successfully launched to the International Space Station (ISS).
On-board was the HamTV transmitter and a number of CubeSats carrying
amateur radio payloads.

The Japanese space agency JAXA has announced details of four CubeSats on
the launch. They will be deployed from the ISS by the JEM Small Satellite
Orbital Deployer (J-SSOD) between October 2013 and March 2014.

The four CubeSats are:
• PicoDragon a 1U CubeSat developed by Vietnam National Satellite
Center(VNSC), University of Tokyo, IHI aerospace. CW beacon on 437.250 MHz
and 1k2 AFSK AX.25 telemetry on 437.365 MHz
• ArduSat-1 and ArduSat-X 1U CubeSats developed by Nanorack, NanoSatisfi.
ArduSat-1 437.325 MHz 9k6 MSK CCSDS downlink. ArduSat-X 437.345MHz 9k6 MSK
CCSDS downlink.
• TechEdSat-3 a 3U CubeSat developed by NASA Ames Research Center

The main mission of *HamTV* is to perform contacts between the astronauts
on the ISS and school students, not only by voice, but also by
unidirectional video from the ISS to the ground within the ARISS program.

The ESA Columbus module on the ISS will host the 2.4 GHz video transmitting
station in addition to the existing 144 MHz FM amateur radio station. This
new equipment can broadcast images from the ISS during the school contacts
or other pre-recorded video images up to 24 hours a day to allow ground
stations tuning.

It is planned to transmit DVB-S signals on 2.4 GHz at either 1.3Msps or
2.3Msps with 10 watts of RF.
   Front panel of the HamTV transmitter

The IARU Amateur Satellite Frequency Coordination
Panel<http://www.amsat.org.uk/iaru>have announced frequencies of
2422.0 MHz and 2437.0 MHz.

HamVideo is the name of the onboard DATV S-band transmitter. HamTV is the
name of the complete system, comprising DATV downlink and VHF voice uplink.
Kaiser Italia SRL was the prime-contractor for the design and development
of the flight and ground segment
http://www.kayser.it/index.php/exploration-2/ham-tv

Read the HamTV overview paper at
http://tinyurl.com/HamTVoverview

HamTV Link Budget
http://www.amsat.it/Amsat-Italia_HamTV.pdf

HamTV on Facebook
https://www.facebook.com/Hamtvproject

ARISS DATV Antennas Installed on Columbus
http://www.ariss-eu.org/columbus.htm
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