Hi Steve,
you are right - with the settings for Flip mode in the menu "Rotor Setup"
(azimuth 360°, elevation 180°) the program checks at the beginning of a
satellite pass whether the satellite "crosses" the end points of your
azimuth rotor (in your case South) in that pass. If so, it runs the pass
from the beginning in Flip mode, that means it turns the azimuth antenna in
the opposite direction and the elevation antenna to 180° - elevation The
color of the control "R" changes from white to yellow.
With the option 450° for azimuth Flip mode doesn't work. This option avoids
also in most cases the 360° turn the rotor has to run when the satellite
crosses the longitude of your location in the North or South.
73s, Erich, DK1TB
----- Original Message -----
From: "Greene, Stephan A" <stephan.a.gre...@thesiorg.com>
To: <amsat-bb@amsat.org>
Sent: Friday, June 14, 2013 2:55 PM
Subject: [amsat-bb] Re: SatPC32 using flip mode at AOS
Yesterday I wrote:
It just occurred to me that I can use direct serial port commands to the
ST2 to test that the azimuth rotor moves CCW from, say, 175 deg to 185
deg, and does not try to go CW through the rotor stops. Repeating with
SatPC32 interface should verify I have the azimuth stops set correctly
without having to wait for a suitable satellite pass. I am hoping this
may have something to do with flip mode being triggered. Or it may just
give me something to try between satellite passes until I figure it out!
I think I figured it out.....and SatPC32 is behaving correctly. SatPC32
will use flip mode at AOS when the azimuth range of a pass goes through
the rotor's South stop (in my case). There were several passes last night
that ranged from around 165-175 degrees azimuth at AOS to 270-350 degrees
at LOS. Flip mode lets SatPC32 use an azimuth range of 345-170 degrees
(think of it as 345-530) to avoid the rotor South stop limit. Restarting
SatPC32 once the satellite was at an azimuth above 180 degrees seemed to
confirm this behavior (I need to test again to be sure).
73, Steve KS1G at a.m.s.a.t dot org
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