[amsat-bb] ISS Digipeater is back! On UHF this time (437.550 MHz)!
bruninga at usna.edu
Wed Nov 2 15:06:54 UTC 2016
Great! But... Everyone must remember, UHF packet is *not* appliance
You must oppositely tune for Doppler on the uplink starting low, and going
high, while tuning the downlink High and going low. Best to pre-program 5
channels and switch during the event. If you do not do this, you are
simplky QRM to everyone else, blocking their successes with your failures.
From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of John Brier
Sent: Wednesday, November 02, 2016 10:52 AM
To: AMSAT BB
Subject: [amsat-bb] ISS Digipeater is back! On UHF this time (437.550
I didn't see this on amsat-bb yet.
I plan on trying the upcoming 16:45 UTC pass.
"#ARISS ISS packet system now operational on UHF (437.550 MHz). #hamradio"
"Due to the failure of the VHF radio in the Columbus module the packet
system on 145.825 is not possible. The crew just swapped the radio for the
UHF equivalent and packet is now operational on 437.550 MHz.
The Kenwood D700 radios were augmented a couple years ago by a Kenwood
D710E radio that was dedicated to SSTV operations. The Russian team soon
afterwards adopted the D710E as their only operational radio but it was
never configured for packet operations.
The ARISS team is working on flying replacement D710GA models to replace
and unify all the hardware. Target for delivery is late 2017.
Submitted by N5VHO on Tue, 2016-11-01 17:14."
73, John Brier KG4AKV
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