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ARISSat-1 Activation 04/12 | Radioaficion Ham Radio

ARISSat-1 Activation 04/12

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From AMSAT-NA -

The transmissions will begin on Monday 11 April 2011 at 14:30 UTC and continue until 10:30 UTC on 13 April 2011.

Due to the fact that the solar panels are covered, the satellite will be powered only by the onboard battery. The satellite will run in low power mode. This means that the transmissions will cycle ON/OFF. They will be ON for 40-60 seconds and OFF for 2 minutes.


145.950 MHz FM Downlink:
FM transmissions will cycle between a voice ID, select telemetry values, 24 international greeting messages in 15 languages and SSTV images. One of the messages will be a conversation between Yuri Gagarin and ground control.

145.919 MHz CW Beacon
The CW transmissions will be callsign ID, select telemetry, and callsigns of people actively involved with the ARISS program.

145.920 MHz SSB BPSK-1000 Telemetry
The BPSK transmissions will feature a new 1kBPSK protocol developed by Phil Karn, KA9Q to be readable in low signal level conditions. The BPSK data will transmit satellite telemetry. Free ground station soundcard demodulator and display software will be available.

Note that the linear transponder will not be active during this event.

ARISSat-1 satellite.

ARISSat-1/RadioSkaf V will have simultaneous 2m FM, CW, BPSK and transponder transmissions. These multiple transmissions are created by a new software defined transponder (SDX) board. Features provided by the SDX include:

* The FM transmissions with cycle between a voice ID, select telemetry values, 24 international greeting messages in 15 languages and live SSTVimages.

* The CW transmissions will be callsign ID, select telemetry, and callsigns of people actively involved with the ARISS program.

* The BPSK transmissions will feature a new 1kBPSK protocol developed by Phil Karn, KA9Q to be readable in low signal level conditions. The BPSK data will alternate betwen telemetry and Kursk experiment data. Free ground station soundcard demodulator and display software will be available before deployment for multiple platforms.

* There also is a 16kHz wide amateur radio U/V transponder between the BPSK
and FM signals.

* The Kursk experiment will be sampling the amount of vacuum each day for 90 minutes and sending down data to map the vacuum change as the satellite slowly spirals into the atmosphere.

Here is the frequency plan for the ARISSat-1 satellite.

Here is the frequency plan for the ARISSat-1 satellite.

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