If all of you are OK with Object 43017 as AO-91, I will make the change Thursday. 11-30-2017.
Ray Hoad WA5QGD Orbital Elements Manager
-----Original Message----- From: Alan [mailto:[email protected]] Sent: Wednesday, November 29, 2017 12:52 To: 'Nico Janssen' [email protected]; 'AMSAT bbs' [email protected]; 'Ray Hoad' [email protected] Subject: RE: [amsat-bb] AMSAT-OSCAR 91 identified
I get the same identification using a different technique. While I haven't had time to characterize the AO-91 transmitter frequency dependence on temperature, in AO-85 is was about -62 Hz/degree C. Looking at the changing temperatures, that converts to about the same value in AO-91.
<-----Original Message----- <From: AMSAT-BB [mailto:[email protected]] On Behalf Of Nico <Janssen <Sent: Wednesday, November 29, 2017 08:30 AM <To: AMSAT bbs [email protected]; Ray Hoad <[email protected] <Subject: [amsat-bb] AMSAT-OSCAR 91 identified < <All, < <Detailed doppler measurements show that AMSAT-OSCAR 91 (AO 91) <is object 43017, 2017-073E. < <There is a small frequency drift on the downlink of OSCAR 91. During <ascending passes, i.e. early afternoon passes from south to north, with <the satellite in full sunlight, the downlink shows a frequency drift of <about -19 Hz per minute. < <73, <Nico PA0DLO < < <_______________________________________________ <Sent via [email protected] 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