[amsat-bb] Observations on tracking programs

[Stephen E. Belter]

Nova has two algorithms for computing the location of the satellites.  Try the other algorithm.  

73, Steve N9IP
--
Steve Belter, seb at wintek.com


> On Sep 2, 2018, at 8:28 AM, Don KB2YSI <kb2ysi at gmail.com> wrote:
> 
> Make sure the keps are updated, Aldo the clock but I assume they are
> running on the same computer so that is unlikely to be a problem.
> 
> 73, Don KB2YSI
> 
>> On Sun, Sep 2, 2018, 02:10 B J <va6bmj at gmail.com> wrote:
>> 
>>> On 9/2/18, Wendy and Terry Osborne <wandtosborne at gmail.com> wrote:
>>> Hi Folks,
>>> 
>>> I have recently been following AO-91 with a selection of tracking
>> programs
>>> and confirming
>>> the results with observations of the downlink.
>>> 
>>> Using the same QTH location and Keps, I found the following:
>>> The AMSAT-NA online tracking page is pretty accurate. See:
>>> https://www.amsat.org/track/index.php
>>> Heavens-above.com is also pretty good. See:
>> https://www.heavens-above.com
>>> SatPC32, Orbitron, InstantTrack, and Quiktrak are pretty good and give
>> the
>>> same results as the “On-Line” trackers.
>>> 
>>> Nova is about 5 minutes ahead.
>>> GPredict is about 5 minutes behind.
>>> 
>>> Has anyone else noticed this?
>> 
>> <snip>
>> 
>> I've never worked AO-91, so I can't comment on that.  I run Gpredict
>> on a Linux ThinkPad and i found that it's been accurate for satellites
>> such as FO-29.
>> 
>> 73s
>> 
>> Bernhard VA6BMJ
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> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
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> Not an AMSAT-NA member? Join now to support the amateur satellite program!
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