sgoralik 2023/08/11 02:42:08 Meridian Flip 1# Start
OK, for us to help you:
Tell us if the mount actually tried a physical meridian flip movement (i.e., change pier side by traversing across the pole),or did it just sit there. When you watched the mount, did it move? Also, did you turn DST (Daylight Saving Time) off in the mount?
If you have indeed turned off the DST flag in your mount's hand controller, and there was no change in motion during the flip time:
1) confirm that the time in your log indeed was the local time at your location when the meridian flip is supposed to occur.
If you were not there to watch it (I assume you were watching and took copious notes, since it was not working), boot up ASIAIR again (indoors is fine), fake an autorun (no need for autoguing), and check the date and time in the log file for today.
Is the log time the same as the local time on your computer clock, or is it off by 1 hour?
2) does your location observe Daylight Saving Time (DST) currently (i.e., are you in the Summer or Winter season)?
3) note down the local time, and then check the UTC time on Google. Tell us both (UTC is enough, but together with local time, might give us a hint of the source of the bug).
4) what is your Longitude -- good to 1 degree is sufficient if you want to preserve your privacy (hint: you have already lost that privacy to a server in China when you started using ASIAIR anyway; that server knows your location to within a couple of meters because you have given permission to the ASIAIR app to pass Location Services info on).
5) between (1), (3) and (4), we should be able to figure out the Local Sidereal Time (LST) when you reached the Meridian on 2023/08/11.
Item (5) is important since there is a persistent bug in ASIAIR (that is why you should use N.I.N.A. or Indigo)where ZWO uses local time (together with DST) to try to figure out the Local Sidereal Time (LST). It will tell us if you are hitting that bug.
Notice that your target is at RA 22h 35m. The LST is the time of the Meridian Transit (i.e., RA should be larger than LST before a Meridian Flip, and then should be smaller than LST when you attempted the flip).
ASIAIR code is too naive to understand how to do an actual Meridian flip. It simply checks the LST vs the RA and then issues a GOTO to the mount. When the GOTO arrives at the mount, and it also thinks that the RA is now past the LST (Meridian), the mount will then execute the flip. If there is any time disagreement (i.e., one uses DST and the other does not) between the ASIAIR and the mount, the mount may not flip in Summer.
Chen
