ARLA/CLUSTER: Actividade em "cross band repeater " desde a ISS com saída em 437,800 MHz

[João Costa > CT1FBF]

ISS 437.800 MHz cross band repeater activated

At 01:02 GMT on September 2 a cross band FM amateur radio repeater with a
downlink on 437.800 MHz was activated on the International Space Station

The Amateur Radio on the International Space Station (ARISS) announcement
reads:

The ARISS team is pleased to announce that set up and installation of the
first element of our next generation radio system was completed and amateur
radio operations with it are now underway.

This first element, dubbed the InterOperable Radio System (IORS), was
installed in the International Space Station Columbus module. The IORS
replaces the Ericsson radio system and packet module that were originally
certified for spaceflight on July 26, 2000.

Initial operation of the new radio system is in FM cross band repeater mode
using an uplink frequency of 145.990 MHz with a CTCSS access tone of 67 Hz
and a downlink frequency of 437.800 MHz. System activation was first
observed at 01:02 UTC on September 2. Special operations will continue to
be announced.

The IORS was launched from Kennedy Space Center on March 6, 2020 on board
the SpaceX CRS-20 resupply mission. It consists of a special,
space-modified JVC Kenwood D710GA transceiver, an ARISS developed
multi-voltage power supply and interconnecting cables. The design,
development, fabrication, testing, and launch of the first IORS was an
incredible five-year engineering achievement accomplished by the ARISS
hardware volunteer team. It will enable new, exciting capabilities for ham
radio operators, students, and the general public. Capabilities include a
higher power radio, voice repeater, digital packet radio (APRS)
capabilities and a Kenwood VC-H1 slow scan television (SSTV) system.

A second IORS undergoes flight certification and will be launched later for
installation in the Russian Service module. This second system enables
dual, simultaneous operations, (e.g. voice repeater and APRS packet),
providing diverse opportunities for radio amateurs. It also provides
on-orbit redundancy to ensure continuous operations in the event of an IORS
component failure.

Next-gen development efforts continue. For the IORS, parts are being
procured and a total of ten systems are being fabricated to support flight,
additional flight spares, ground testing and astronaut training. Follow-on
next generation radio system elements include an L-band repeater uplink
capability, currently in development, and a flight Raspberry-Pi, dubbed
“ARISS-Pi,� that is just beginning the design phase.  The ARISS-Pi promises
operations autonomy and enhanced SSTV operations.

ARISS is run almost entirely by volunteers, and with the help of generous
contributions from ARISS sponsors and individuals. Donations to the ARISS
program for next generation hardware developments, operations, education,
and administration are welcome -- please go to
https://www.ariss.org/donate.html to contribute to these efforts.

ARISS--Celebrating 20 years of continuous amateur radio operations on the
ISS!
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