[amsat-bb] Gold Standard for Keplerian Data
erich.eichmann at t-online.de
Sun Nov 23 17:45:25 UTC 2014
I compared the results of the pass prediction from the AMSAT website for
the next 10 passes of FO-29 with the results of WinListen (that comes
with SatPC32) for my location (8.9 degrees east, 51.94 north). The
results are exactly the same (WinListen rounds the AOS/LOS times to the
closest full minute, however). It requires to enter and save your QTH
locator or longitude/latitude. I used the latest file nasa.all as Keps
in most cases of different results between the AMSAT pass precition and
SatPC32 wrong longitude/latitude values in menu "Setup", "Observer" or
"Setup" of WinListen or different Keplerian data were the reason.
What is your 6-digit QTH locator (or longitude west and latitude
north)? What is the entry in SatPC32, menu "Observer" and in WinListen,
What Keps file do you use? Download the Keps file you use from
SatPC32 menu "Satellites", "Update Keps". When the download is
successful click "Quit" and then "OK". The path to the Keps files folder
can be seen in the foot line of menu "Satellites", the file date in the
bottom line of the SatPC32 main window and in the left list of the menu
you can choose the file. WinListen will use the same same path (foot
line in menu "Listen").
73, Erich, DK1TB
Am 23.11.2014 17:04, schrieb Steve May:
> I have noticed that when I update the Keplerian Data for my location on
> SatPC32 and generate a list of passes they all seem to be about 5 minutes
> different than the predictions from the AMSAT website. This is for the
> earliest pass, and I am using the exact GPS coordinates for my location.
> So which do I rely on? Which predictions should I consider the "gold
> standard" for passes?
> Steve, W5IEM
> Sent via AMSAT-BB at 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://amsat.org/mailman/listinfo/amsat-bb
More information about the AMSAT-BB