Hi Bob, you are running rotor control in flip mode. That mode is switched on by choosing 180 degs for max. elevation. Azimut is then limited to 360 degs (you can not combine flip mode and the 450-degs-option). With flip mode enabled the program should work as follows: It checks whether the az. rotor will get to it's end point (North) during the pass. Therefore it checks at the beginning of a pass (exactly: if you start tracking before the rotor has reached the end point) whether the satellite will cross the meridian of your location in the North during the pass. If so, it will steer the antenna in flip mode (az. antenna in opposite direction, el. antenna 180 - true elevation). The color of the control "R" will change to yellow). During such pass it should not switch from flip mode to normal mode. So, check whether your rotor control works in that way. 73s, Erich, DK1TB
Am 31.08.2018 um 14:41 schrieb Robert Koepke:
I am using SATPC32 V12.8c with a Yaesu G5500 rotator and a GS-232B controller. In rotor setup the Max elevation is set to 180 degrees. The rotator has not been calibrated in some time, but it seems to be pointing in the correct direction and has been working properly.
But on an overhead pass (>65 degrees) when I turned on the rotor control in SATPC32 the antenna went to the horizon at the proper azimuth but flipped so the control box showed elevation at 180 degrees (visually verified). Tracking was correct but when the antenna was back down to about 45 degrees the antenna swung around 180 degrees and "unflipped" the antenna, then tracked properly to the opposite horizon. Since then it has been working properly again, but I have not had another overhead pass.
Has anyone seen this type of behavior or can direct me to a possible remedy?
Thanks Bob - AA6TB
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