Hi Folks,
Following JoAnne's advice, I found 3 entries for AO-91 in GPredict for Windows. One was 5 minutes fast, one was 5 minutes slow and the 3rd one was correct. The correct one is the 3rd one down on the menu. If anyone else is having problems, then that is the one to check.
73, Terry Osborne ZL2BAC
-----Original Message----- From: Wendy and Terry Osborne Sent: Monday, September 03, 2018 2:58 PM To: JoAnne K9JKM Cc: [email protected] Subject: Re: [amsat-bb] Observations on tracking programs
Hi JoAnne and everyone,
Thanks for that. Yes I had two entries for AO-91. One with last years keps that I had selected and one with current keps that I hadn't selected. Putting the correct entry in fixed the problem and Nova now agrees with Orbitron.
I usually go outside and catch AO-91 with a hand held + yagi. When using Nova, I had to wait about an extra 5 minutes for AOS and LOS was about 5 minutes later than predicted. I actually like Nova, just a personal preference really.
73, Terry Osborne ZL2BAC
-----Original Message----- From: JoAnne K9JKM Sent: Monday, September 03, 2018 1:02 AM To: 'AMSAT BB' Subject: Re: [amsat-bb] Observations on tracking programs
Nova has two algorithms for computing the location of the satellites. Try the other algorithm.
I've noticed a bit of sneakiness tracking AO-91 with Nova. I find I'm several minutes off once or twice a year. The main symptom is a weak downlink from AO-91 since the antenna is aimed at a spot in the sky which is not on time.
What I've found is somehow Nova has 2 or 3 instances of AO-91 in the table where you choose the satellites to add to the tracking view. None of the other satellites have multiple instances. What I need to do is to select each instance of AO-91 and keep only the one that accurately matches the other resources you can compare with.
-- 73 de JoAnne K9JKM [email protected]
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