$PASSDIR/antenna/antenna.calib
The antenna.calib file contains the calibration values for each tracking antenna on the system. Each antenna may be used by one or more telemetry chains. When an antenna is accessed for the first time, there is no data in the antenna.calib file. The initial value for each setting is obtained from the antenna specifications in the antenna.config file. The antenna type is defined in the system.config file setting [antenna-X]antenna.type, where antenna-X is the antenna associated with a telemetry chain.
| Families: | |
| One or more antenna families are defined in the file. Each family name is followed by 11 settings and has the following format: | |
| [antenna-X] | antenna-X family, X is = 1,2,3.... Indexed by antenna.index of a telemetry chain in $PASSDIR/system.config. |
Settings: |
|
| az.orient | Antenna azimuth orientation, in degrees. A positive value means the antenna is oriented clockwise (east) of true north. A negative value means the antenna is oriented counterclockwise (west) of true north. For example, if az.orient: 10, the antenna is mounted 10 degrees east of true north. Updated by align or autoalign. |
| az.lead | Time (in seconds) required to position the azimuth axis of the antenna. The time correction is applied to the entire azimuth tracking sequence. Updated by trackeye x antlead. |
| el.orient | Elevation orientation, in degrees. A positive value means the feed must be lowered to be correctly positioned. A negative value means the feed must be raised to be correctly positioned. |
| el.lead | Time ( in seconds) required to position the elevation axis of the antenna. The time correction is applied to the entire elevation tracking sequence. Updated by trackeye x antlead. |
| az.park | When a pass is complete, that antenna is stowed (or parked). This value is the azimuth axis stow position, in degrees. A value of -400.0 means that the antenna will not be stowed. |
| el.park | Elevation axis stow position, in degrees. |
| min.track.el | Minimum tracking elevation, in degrees. The satellite will not be tracked below this elevation. Usually set to 0.0 degrees. |
| threshold | Receiver signal strength ( in counts) that signals that a lock has occurred. This value is used by the command autoalign. The receiver signal strength is shown as the Sig field of trackeye. The default value of 0.0 implied a signal strength of 50 counts. |
| counts.deg | Receiver signal strength counts per degree of antenna elevation change. Default value is 0.0 (no correction). Used by autoalign. |
| constants | Some antennas have calibration coefficients describing the azimuth and elevation drive assemblies. 1 to 17 double precision real values can be defined. If the antenna has no coefficients, the word none is used. |
| controller.version | Antenna controller firmware version (if readable from the controller). This value is set to 0.0 if undefined. |
[1]cat $PASSDIR/antenna/antenna.calib [antenna-1] controller version: 2.04 az.orient: 12.0 az.lead: 3.3 el.orient: 0.0 el.lead: 4.2 az.park: 360.0 el.park: 90.0 min.track.el: 0.0 threshold: 0.0 counts.deg: 0.0 constants: none #
Last Updated: $Date: 2002/02/08 21:24:13 $