[amsat-bb] Re: ARISSat over UK - 23.46utc Pass

David Barber david.barber at dbelectronics.co.uk
Wed Aug 3 17:42:53 PDT 2011


Using a vertically polarised beam here.

Deep double nulls.

Occurring approximately every 4 to 5 seconds.

Duration probably no more than 1.5 seconds.

I do have a wave file if you want it but it is 16mB in size.



-----Original Message-----
From: Phil Karn [mailto:karn at philkarn.net] 
Sent: 04 August 2011 01:27
To: david.barber at dbelectronics.co.uk
Cc: amsat-bb at amsat.org
Subject: Re: [amsat-bb] ARISSat over UK - 23.46utc Pass

On 8/3/11 5:11 PM, David Barber wrote:
>>From the sound of the signal the satellite would appear to be tumbling
> slowly.

Are there any deep nulls in the fading? If so, how long are they?

I designed the interleaving to tolerate deep fades of up to about 1-1.5
seconds as long as they don't occur more often than about once every 15
sec or so. Shorter fades can be tolerated more often.

Phil, KA9Q

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