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Re: Doppler correction software for linear satellites



On Wed, 6 Sep 2000, Hamish Moffatt wrote:

> 
> Is there any software around which will do full Doppler correction
> for the linear transponder satellites?

The Linux version of PREDICT provides Doppler data to networked
client applications through socket connections.  The Doppler information
provided by the program is normalized to a 100 MHz downlink (a
convenient number), so your application would have to know your
operating frequencies, and whether the frequencies in question are
uplinks or downlinks to scale the normalized Doppler information
correctly.

But it's up to YOU (meaning the satellite enthusiasts) to write the
client applications to scale the data and properly interface the
needed controls to your groundstation radio equipment.  It shouldn't
be difficult, since PREDICT comes with full documentation and a sample
program that shows how the Doppler (and other tracking data) is polled
from the program using socket connections.


73, de John, KD2BD

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