Steve, 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 file.
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, menu "Setup"? 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?
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