Alexandar,
I am not sure how you have it programmed into the radio so far, but I would program 5 memory frequencies into your HT:
(AO27)
436.805 (AOS) 436.800 436.795 (TCA - Time Of Closest Approach) 436.790 436.785 (LOS)
Since AO27 switches off way before LOS, you will probably never need the last frequency - 436.785 - but these would be the common frequency steps for a typical bird like AO51, SO50, etc. Don't be afraid to make adjustments either. I find that to hear the 30 sec. of TLM right before AO27 switches to VOX I have to be at 436.810. This is probably more a feature of the radio itself. If you are having trouble hear at AOS or LOS, try adjusting your downlink by 5kHz.
You can also add alpha-numeric tags to your frequencies to keep them in order:
AO27-1 AO27-2 AO27-TCA AO27-4 AO27-5
There are many different variations you can choose from.
73!
Zack KD8KSN
-----Original Message----- From: Alexander Sack Sent: Monday, May 16, 2011 4:23 PM To: Clint Bradford Cc: Clint Bradford ; amsat-bb@amsat.org Subject: [amsat-bb] Re: Fm satellite Frequencies and Doppler
On Mon, May 16, 2011 at 3:50 PM, Clint Bradford clintbradford@mac.com wrote:
... go to AMSAT's sat status page ...
Personally, I prefer to get folks in the habit of checking the actual control team pages for the various FM birds. That leaves any "middlemen" and third=party Web site editing delays out of the equation.
I mean, what better info is there than that published by those who actually control the satellites?
I too am a beginner and wondered about how to calculate doppler and/or determine a rough estimation based on pass information (elevation/az, etc.). I tend to start about 10 kHz up on any given pass which seems to be a reasonable approximation for most of the birds so far (I started this way because I followed the AO-27 FAQ).
My biggest challenge is finding the signal while adjusting for doppler. Once I get it though, I'm good for the rest of the pass! :-)
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