[sat] Details zu Arissat

[Robert Kiendl]

Hallo zusammen,

Nochmals Details zum "Arissat Event":
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ANS-208
In this Special Bulletin:

* Deployment of ARISSat-1/KEDR Satellite Expected August 3
* ARISSat-1/KEDR Test Transmissions Planned From ISS July 30-31

SILVER SPRING, MARYLAND (AMSAT News Service) After a postponed 
deployment in February from the International Space Station (ISS), 
the ARISSat-1/KEDR amateur radio satellite is expected to begin its 
mission on August 3, 2011. This was the word received from Energia 
official, Sergey Samburov during an ARISS teleconference on July 19. 
Deployment of the craft is planned during EVA-29. 

NASA TV will cover the EVA live starting at 1400 GMT on August 3.
1430: Hatch Open
1446: Egress ARISSat-1 and secure to airlock ladder
1452: Remove solar panel covers
1507: Translate to deploy site, activate PWR, TIMER1 and TIMER2 
      switches, verify LEDs on, and deploy
(Internet streaming: http://www.nasa.gov/multimedia/nasatv/index.html)

ARISSat-1/KEDR is a satellite designed and built by amateur radio 
operators to specifically interest students in scientific and tech-
nological careers. Through the use of ham radio equipment, students 
and teachers should be able to access and utilize the satellite from 
a classroom environment with minimal set up. 

ARISSat-1/KEDR is a cooperative effort between AMSAT, ARISS (Amateur 
Radio on the International Space Station,) RSC-Energia (The Russian 
Space Agency) and NASA. The design, development and construction of 
the satellite was done by AMSAT volunteers. Original plans called 
for the satellite to be housed inside an old Russian spacesuit, but 
when the suit became unavailable, a spaceframe was developed to house 
the radio equipment and solar panels. The new satellite was named 
ARISSat-1/KEDR. Another name for the spacecraft is RadioSkaf-V. The 
transmitted callsign will be RS01S.

The mission was specifically designed as an education-based satellite. 
Some of its broadcast features include a voice identification, voice, 
digital and morse code telemetry, stored image and on-board camera 
transmissions via Slow Scan TV and digital telemetry from a Russian 
science experiment that will measure vacuum in earth's lower atmo-
sphere. Other aspects of the mission include CW (Morse code) and 
voice message contests to interest students in participating along 
with stored images submitted by students all over the world as part 
of its payload. 

ARISSat-1/KEDR Test Transmissions Planned From ISS July 30-31

Test transmissions from ARISSat-1/KEDR are scheduled to begin four 
days prior to deployment at 19:15 UTC on July 30 and then continue 
until 1430 UTC on July 31. 

The satellite will be connected to an external antenna mounted on 
the ISS during testing. During the test ARISSat-1/KEDR will be in
LOW power mode, this means that it will transmit about 40 seconds 
and then shut down for 2 minutes and then transmit for again for 
40 seconds. 

To listen for ARISSat-1/KEDR signals, FM receivers should be tuned 
to 145.950 MHz.  Even though the satellite will only have an output 
of 250 mW on 2 meters, a standard FM handy talkie equipped with a 
quarter-wave whip antenna should be able to receive the voice ID, 
voice telemetry and greeting messages as the craft passes overhead. 

SSTV transmissions may also be demodulated and viewed using a free 
downloadable program such as MMSSTV that is available at:  
http://mmhamsoft.amateur-radio.ca/pages/mmsstv.php. 
For Mac users, Multiscan2 is available at: 
http://web.me.com/kd6cji/MacSSTV/MultiScan.html.

Those planning to monitor voice broadcasts from ARISSat-1/KEDR 
during the July 30 - 31 test are requested to make note of the 
telemetry battery voltage values and UTC time, and then submit 
their records by e-mail to: julytest at arissat1.org. 

Digital telemetry will be sent at 145.920 MHz. Given the low duty 
cycle of the spacecraft, those planning to receive the digital 
telemetry are encouraged to record the entire signal band using 
the FunCube dongle or SDR-IQ receivers. Software for demodulating 
the BPSK-1000 telemetry is available at http://www.arissattlm.org; 
the software Quick Start Guide is available on the link on the 
http://www.amsat.org front page. 

After it is deployed from the International Space Station, 
ARISSat-1/KEDR is expected to be in orbit for a period of up to 
six months.

More information on the transmission schedule and overall mission 
of ARISSat-1/KEDR can be found at:

ARISSat-1/KEDR Web site: http://www.arissat1.org 
AMSAT Web site:          http://www.amsat.org 
ARISS  Web site:         http://www.ariss.org 
ARISS Facebook Page:     Amateur Radio on the ISS (ARISS)
ARISS Twitter site:      @ARISS_status

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