[amsat-bb] Re: HRD Satellite Tracking - Technology Preview

David - KG4ZLB/MØZLB m0zlb at btinternet.com
Sat Aug 23 07:56:37 PDT 2008

Thanks Simon, I will give it a go.

My comments about Doppler may have been in error, what I meant was the 
fact that HRD failed to keep up with the change in the satellites 
movement and it was also impossible to use the manual tuning function as 
it just reverted back to what HRD wanted it to be at - these points I 
brought up maybe two years ago on the help forums!
I like using the satellite function of HRD as, apart from NOVA, I think 
it has the best user interface screen of any others I have tried!


Simon (HB9DRV) wrote:
> Yes, you do *not* need to connect to a radio.
> An advantage of splitting this code into its own executable is that I 
> can maintain it - with too much in the HRD executable it's just too 
> easy to change something in one area and break something else.
> Re: Doppler - you can update Kepler files as often as you want, for 
> example download latest data every 15 minutes. Listening to CW beacons 
> on 70cms I hear (and see) no change in pitch at all, so the Doppler's 
> working!
> Simon Brown, HB9DRV
> www.ham-radio-deluxe.com
> ----- Original Message ----- From: "David" <m0zlb at btinternet.com>
> Simon,
> Before downloading and trying it out can you tell me if the satellite 
> tracking program works without having the radio(s) connected? One of 
> the original versions of HRD that I used allowed me to check passes 
> etc without the need to have the radio in line - the latest version 
> was inoperable unless the radio was there. I stopped using HRD at this 
> point although the well documented problem with the non- functioning 
> Doppler compensation control was another factor.




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