ARLA/CLUSTER: ARISS esclarece a questão da NÃO actividade geral do repetidor em "crossband" na ISS

[João Costa > CT1FBF]

ARISS crossband repeater is NOT active for general communications

ARISS reminds amateur operators that the voice repeater aboard the ISS has
not officially been activated for general radio contacts although some
stations have reported successful contacts using 435.050 MHz FM as the
uplink and 145.800 MHz FM as the downlink.

Last week these satellites with amateur radio were deployed by the Russian
crew during their EVA:

TOMSK TPU-120 (RS04S) 437.025 MHz FM voice announcements
Tanusha-SWSU-1 (RS-6S) 437.050 MHz AX25 9K6 bps, FM voice announcements
Tanusha-SWSU-2 (RS-7S) 437.050 MHz AX25 9K6 bps, FM voice announcements

The Russian team set up the ISS repeater as a crossband relay between
437.050 MHz and 145.800 MHz at the last minute because they were concerned
about getting telemetry from their satellites, which might be spinning more
than they had expected. They are hoping the nearby receiver on ISS can
capture and retransmit telemetry that is not being picked up on the ground.

USING THE RADIO AS A VOICE REPEATER FOR GENERAL CONTACTS DOES INTERFERE
WITH THE INTENDED MISSION OF SUPPORTING RELAY OF TELEMETRY FROM THE TANUSHA
SATELLITES.

Radio amateurs wishing to try receiving the Tanusha telemetry can find
technical details on the Southwest State University Space Activity page
at: http://eng.swsu.ru/space

When the ARISS voice repeater is active and authorized for general amateur
voice contacts the uplink frequency is 437.800 MHz FM using the 145.800 MHz
FM downlink.

Thanks to ARISS, the Russian Southwest State University and ANS for the
above information
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