Sent using Zoho Mail

Hello all,

While listening to this morning's AO-91 pass, I noticed CW-modulated
noise in the background. So did one or more operators on AO-91, who
thought that the station was trying to send CW through AO-91.

Switching over to CW mode, I copied: "manfred es christ fuchs 73 de
ii3mv max valier sat manfred es christa fuchs 73 de ii3mv max"

This turns out to be the Max Valier satellite, launched in 2017, which
(unfortunately) uses Amateur Radio spectrum for a scientific downlink
and does not provide any communication resources in return.

AO-91's downlink is close enough to Max Valier's that, with Doppler
correction, may make it into your receiver's FM discriminator and show
up as CW-modulated noise when AO-91's signal fades.

Hopefully, this note will inform other stations that one should not
assume intentional or unintentional interference without verifying the
origin of the signal received.

73,

--- Zach
N0ZGO

-----------------------------------------------------------

Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of AMSAT-NA.
Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/

View archives of this mailing list at
https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org
To unsubscribe send an email to amsat-bb-leave(a)amsat.org
Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org