ABOARD THE INTERNATIONAL SPACE STATION (ISS), About 410 Km (255 miles) above earth
The current ham equipment (2014) consists of two Ericsson HT's: M-PA VHF and M-PA UHF, a
Kenwood TM-D700 and a TM-D710. They also have packet capability with a Pico-packet TNC.
For ham operation, the redundant "Sirius" antenna was used initially (originally used in the 147 MHz segment
for launch telemetry). They now have dedicated ham antennas installed.
The DATV transmitter will be in blank transmission mode beginning july 22 @ 0955 UTC, and run permanently until
august 6. It will run in configuration 4, which is 2.395 GHz, 2 Ms/s.
DATV (Ham video) commissioning postponed (2014-02-08)
Possible dates for the four commissioning steps are
March 8 (step 1)
March 9 (step 2)
March 16 (step 3)
Step 3 could be turned into step 4.
These dates are all on the weekend.
With this agenda, we have just 1 week of blank transmissions.
The agenda is still to be finalized.
Hot news (2014-01-26)
Digital Amateur Television commissioning – Blank transmissions
There are four commissioning steps scheduled for february 8, 15, 16 and march 5. Blank Transmissions will start
immediately at the conclusion of Commissioning Step 1 and will continue until Commissioning Step 4. This means
that the Digital ATV transmitter will operate continuously during 25 days.
The DATV signal parameters will be:
Ham Video will operate with a Canon XF-305 camera, but the camera will be turned off during the blank transmissions.
- Downlink frequency: 2.395 GHz
- DVB-S standard (QPSK modulation)
- Symbol rate: 1.3 Ms/s
- FEC : ½
- Video PID = 256
- Audio PID = 257
- RF radiated power: approximately 10 W EIRP
IARU coordination panel has announced that the Ham TV project on ISS will be using the 13 cm band.
The frequencies are 2422.0 and 2437.0 MHz with a transmitter power of 10 W EIRP in the DVB-S format.
The equipment is now located in the Columbus module and will be used primarily during school contacts
but can also transmit prerecorded video material for up to 24 hours/day.
Voice and packet frequencies
|145.800 FM||Downlink +/- 3 KHz doppler
|437.800 FM||Uplink +/- 10 KHz doppler
|143.625 FM||Primary non-ham downlink. Do NOT transmit here!
|145.800 FM||Ham voice/SSTV downlink, worldwide
|145.825 FM||Ham packet up/downlink, worldwide
|145.200 FM||Ham voice uplink, region 1 (Europe and Africa)
|144.490 FM||Ham voice uplink, region 2 & 3 (Americas, Asia & Oceania)
|437.550 FM||Ham packet up/downlink, worldwide