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 k9jkm@amsat.org
_______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb