[amsat-bb] AO 91 Rumbling Noise

Zach Metzinger zmetzing at pobox.com
Tue Jan 23 16:09:03 UTC 2018

On 01/22/18 15:45, Bernie and Cheryl wrote:
> Thanks for the replies, guys.  That explains it.  I'd just never heard
> it before on other FM birds.
> 73 de Bernie, KF0QS
> On 1/22/2018 2:08 PM, Alan wrote:
>> Bernie,
>> You are hearing the Data Under Voice telemetry.  It is transmitted in

>> <-----Original Message-----
>> <From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Bernie

>> <Forgive me if someone has already discussed this, but I noticed a
>> <"rumbling" noise in the background during this morning's AO 91 pass.
>> <What is that?  It almost sounds like a train is passing by.  It was not

I believe this was specifically designed to keep the VP-Engineering
happy, given his predilection for train sounds. hihi

--- Zach

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