Table of Contents
Advertisement
RC4600 ACU Board Set
Chapter 1
Introduction
If a valid lat/lon is received from the GPS then the lat/lon information will be displayed. Next the RC4600
will flash "MAGVAR" while it calculates the local magnetic deviation as a function of latitude, longitude
and time. After calculating the local magnetic variation, the RC4600 will poll the compass for magnetic
heading information. The magnetic variation will be applied to the magnetic heading to form the
estimated true heading of the mount.
If the navigation sensors (GPS and/or compass) are not working (or not available), the position
information may be entered manually via the POSITION mode (2.1.1.2.2.5).
SAT: GALAXY 28 89.0W
<1>SELECT NEW SAT
The SAT: field shows the currently selected satellite's name and longitude. When the mode is first
entered, the name of the last satellite selected will be displayed. If the user wishes to locate another
satellite, he may start the process of selecting the new satellite by pressing the "1" key. See 2.1.1.2.2.3.1
for further details on the three methods of selecting a satellite.
When the selected satellite is changed, the LOCATE mode will automatically calculate new azimuth and
elevation pointing targets.
AZ: -4.6
EL: 44.8
These fields show the azimuth and elevation pointing angles calculated for the selected satellite based on
the current mount position estimate. If one of the required parameters is missing or the calculation has
yielded an invalid answer, asterisks will be displayed in these fields.
NOTE: the displayed AZ target is not a true heading display but rather a mount-relative angle. The
elevation target is a true elevation value.
30
Advertisement
Table of Contents
