SAWDIS Share Buttons

SAWDIS Share Buttons:

03 August 2011

ARISSat-1 Deployment Set for August 3; Watch Live via Computer or TV



At 1430 UTC on Wednesday, August 3, two Russian cosmonauts will begin a six-hour spacewalk that will see the deployment of ARISSat-1/KEDR. Expedition 28 Russian Flight Engineers Sergei Volkov, RU3DIS, and Alexander Samokutyaev will launch the satellite from the ISS near the beginning of the spacewalk. NASA will carry the spacewalk live on their website beginning at 1400 UTC.
According to the schedule, the hatch to the ISS will open at 1430, and just 16 minutes later, the cosmonauts will bring ARISSat-1 out and secure the airlock chamber. At 1452, the team will remove the satellite’s solar panel covers and at 1507, they will bring ARISSat-1 to the deploy site, activate the PWR, TIMER1 and TIMER2 switches, verify that the LEDs are on and deploy the satellite.
ARISSat-1 will be active on the following frequencies and modes:
  • 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, as well as SSTV images. If you successfully receive the SSTV transmissions, you are invited to upload your picture to the ARISS SSTV Gallery.
  • 435 MHz - 145 MHz Linear Transponder: The linear transponder will operate in Mode U/V (70 cm up, 2 meters down). It is a 16 kHz wide inverting passband and the convention will be to transmit LSB on the 435 MHz uplink and receive USB on the 145 MHz downlink.
  • 145.919 MHz/145.939 MHz CW Beacons: The CW transmissions will be call sign ID RS01S, select telemetry and call signs 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. When the CW2 beacon on 145.919 MHz is active, this indicates that the BPSK-1000 format is being transmitted. If the CW1 beacon on 145.939 MHz is active, the backup of BPSK-400 format is being transmitted.
AMSAT needs your telemetry from ARISSat-1/KEDR after deployment from the International Space Station. Since there are no “Whole Orbit Data” storage mechanisms onboard ARISSat-1/KEDR, listener submissions are the only way for AMSAT to collect the spacecraft telemetry and KURSK experiment results. Here’s how you can help:
  • Recorded ARISSat-1/KEDR and Kursk telemetry CSV files (in the ARISSatTLM folder) can be sent as via e-mail as an attachment.
  • If you are running ARISSatTLM and receiving the signal “live” from ARISSat-1/KEDR, please enable the telemetry forwarding option.
  • The latest telemetry can be seen live on your computer or cell phone.
AMSAT has also posted an ARISSat-1/KEDR “How To” page on their website with pointers concerning digital aspects, such as BPSK telemetry reception, SSTV reception and more.
Volkov and Samokutyaev will also install laser communications equipment and replace experiments on the Zvezda service module, retrieve a rendezvous antenna and relocate a boom structure to aid future spacewalks while on the spacewalk. This spacewalk will be the third for Volkov, who performed two spacewalks as Expedition 17 commander in 2008. This will be the first spacewalk for Samokutyaev.
Check your cable or satellite listings for the NASA TV channel in your area.

- ARRL

SAWDIS  - Man this is really exciting stuff!!  On the July 30 - 31 I was involved in on-air tests carried out
aboard the International Space Station. Reports have been received from amateur radio stations around the world. Africa, South America, parts of Asia were within range of the footprint first. Next Europe and
North America will be in range.

Here is a sampling of the signal reports received via amsat-bb:

Johan, ZS1I - in South Africa reported hearing the ARISSat-1/KEDR
SSTV signal using a handheld and a rubber duck antenna.

Nader Omer, ST2NH - In Khartoum, Sudan Last pass 22.50 UTC I
heard a weak voice before LOS! It sounded like a recorded message.
No SSTV or Telemetry.

Mineo Wakita, JE9PEL - In Japan, I heard ARISSat-1/KEDR VOICE and
SSTV strong signal, S9 + over 40dB at 23:12-23:22UTC, 30 Jul 2011.
The received SSTV picture can be viewed at:
http://www.ne.jp/asahi/hamradio/je9pel/10731ari.png

Masa, JN1GKZ - In Japan, the 0051z pass was also good signal from
ARISSat-1/KEDR and ISS. SSTV, voice msg and voice tlm were heard.
At 0056z the CW telemetry decoded as:
[bat 29.72v -214ma rf 346ma hi this is ariss at 1 r]
I got SSTV picture from ARISSat-1 at 2140z. The picture is noisy
but fine!

Luciano, PY5LF - In Brazil, signal heard a few minutes ago on
145.950. Recorded video of the pass at:
http://www.youtube.com/watch?v=z_-DLZq9gmc

Reports received from Sergey Samburov, RV3DR say that ARISSat-1/KEDR
is in 'test mode', using the same setup as was used back in April
for the Gagarin Commemoration where the TM-D710 on board the ISS
is 'repeating' the ARISSat-1/KEDR output signal on 437.550 MHz

Reception reports of the ARISSat-1/Kedr signals flooded in from around the world to the arissat1 mailbox during the 20 hour test period last weekend. Some of the areas reporting were: South Africa, Japan, Hawaii, Sweden, Europe, China, Brazil, Barbados, Czech Republic, United States and Ukraine. In all over 50 reports from 20 different countries were received. The battery voltage went from 30.09 V to 26.3 V during the test. 

Now today is launch day and we all wait in anticipation to receive signals from ARISSat-1/KEDR!!
More on this exiting launch.