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RE: terminology to describe orbit attitude



ALON  ALAT Attitude longitude and latitude.  Orientation of the +Z axis
   with respect to the orbit plane.  +Z (and the hi-gain antennas) pointed
   toward perigee is ALON=0, ALAT=0.  Longitude is measured in the direction
   of spacecraft motion aound its orbit from perigee.  Latitude is measured
   "up".  Sometimes BLON/BLAT is used.  B = Bahn = Germ. plane.

-----Original Message-----
From: Estes Wayne-W10191 [mailto:W10191@motorola.com]
Sent: Friday, January 10, 2003 12:30 PM
To: amsat-bb@amsat.org
Subject: [amsat-bb] terminology to describe orbit attitude


Sometimes the attitude of a satellite's orbit is described as "Alon/Alat".
Sometimes the attitude of a satellite's orbit is described as "Blon/Blat".

It is well known that the "B" refers to "Bahn coordinates".
What does the "A" refer to?  
Is it exactly the same as Bahn coordinates?


Wayne Estes W9AE
Mundelein, IL, USA
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