ARISSat-1 Re-entry Date

Sergey Samburov RV3DR with ARISSat-1

Sergey Samburov RV3DR with ARISSat-1

The latest prediction from Jim N8OQ is that the amateur radio satellite ARISSat-1 will re-enter the Earths atmosphere in January.

On the AMSAT bulletin board Jim says “Using solar data through 2011 Nov. 30 and updating the decay fit. I am getting a re-entry date of 2012 January 12 with a rule-of-thumb error estimate of +/- 10 days or so for ARISSat-1.”

Since deployment in August, ARISSat-1 has descended about 60 km, and is currently losing more than 1.5 km per day. The rapid rate is partially the result of the recent solar activity on the atmosphere, significantly increasing the drag.

AMSAT wishes to collect telemetry data from the satellite as it approaches re-entry and is running a competition to see who can copy the final telemetry frames. Further details of the Catch the Last ARISSat-1 Telemetry Contest at
http://www.uk.amsat.org/2011/11/09/catch-the-last-arissat-1-telemetry/

ARISSat-1 http://www.arissat-1.org/

Online pass predictions (select ARISSat-1) http://www.amsat.org/amsat-new/tools/

Download the Windows and Mac versions of the ARISSatTLM free ground station soundcard demodulator and display software from http://www.arissattlm.org/

ARISSat-1 Frequency Guide http://tinyurl.com/4t497t2

Catch the Last ARISSat-1 Telemetry

Now that the submissions are complete for the Chicken Little Contest, AMSAT is announcing a new contest: Catch the Last ARISSat-1 Telemetry. With luck, we will have real time data to go along with the final reentry. While telemetry sent by e-mail is valuable and requested, the contest will be judged solely on data sent through the official ARISSatTLM programs directly to the Internet telemetry server.

How do I enter? Simple. Just submit ARISSat-1 telemetry over the Internet using either ARISSatTLM telemetry program. You can use the PC version or the MAC version of ARISSatTLM. You are automatically eligible.

Are there separate categories for entrants? No.

How is the winner determined? The call, or name, in the last block of data received by telemetry server wins.

How will the winner be announced? Via the usual AMSAT News Service, and on the Chicken Little Contest site.

If ARISSat-1 fails sometime before reentry, does it count? Yes! Engineering data is essential input for future projects!

What do I get if I win? A certificate in PDF format suitable for framing, and the gratitude of the ARISSat-1 team.

In short, just keeps those telemetry blocks flowing!

Remember: you can see the latest ARISSat-1 telemetry at
http://www.arissattlm.org/live

Mark L. Hammond  [N8MH]

AMSAT-NA

ARISSat-1 http://www.amsat.org/amsat-new/ARISSat/ARISSatContest

Online pass predictions (select ARISSat-1) http://www.amsat.org/amsat-new/tools/

Download the Windows and Mac versions of the ARISSatTLM free ground station soundcard demodulator and display software from http://www.arissattlm.org/

ARISSat-1 Frequency Guide http://tinyurl.com/4t497t2

It's time to get ready for ARISSat-1

It’s time to get ready for ARISSat-1

A few weeks remain before the planned July deployment of ARISSat-1 from the ISS.

ARISSat-1

ARISSat-1

Here are some reminders to help you get your station ready for ARISSat-1 operation.

145.950 MHz FM Downlink:
FM transmissions will cycle between a voice ID as RS01S, 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. See the next news item for pointers to get your station ready to receive the SSTV images.

435 MHz – 145 MHz Linear Transponder:
The linear transponder will operate in Mode U/V (70 cm Up, 2m Down).
It is an 16 KHz wide inverting passband and the convention will be to TX LSB on the 435 MHz uplink and RX USB on the 145 MHz downlink. This mode is designed to work with low power transmitters and omni antenna.

145.919 MHz/145.939 MHz CW Beacon:
The CW transmissions will be callsign ID RS01S, select telemetry, and callsigns of people actively involved with the ARISS program.

Continue reading

It’s time to get ready for ARISSat-1

It’s time to get ready for ARISSat-1

A few weeks remain before the planned July deployment of ARISSat-1 from the ISS.

ARISSat-1

ARISSat-1

Here are some reminders to help you get your station ready for ARISSat-1 operation.

145.950 MHz FM Downlink:
FM transmissions will cycle between a voice ID as RS01S, 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. See the next news item for pointers to get your station ready to receive the SSTV images.

435 MHz – 145 MHz Linear Transponder:
The linear transponder will operate in Mode U/V (70 cm Up, 2m Down).
It is an 16 KHz wide inverting passband and the convention will be to TX LSB on the 435 MHz uplink and RX USB on the 145 MHz downlink. This mode is designed to work with low power transmitters and omni antenna.

145.919 MHz/145.939 MHz CW Beacon:
The CW transmissions will be callsign ID RS01S, select telemetry, and callsigns of people actively involved with the ARISS program.

Continue reading