RC3000 Antenna Controller Appendix TLE Two Line Element Tracking
TLE-3
3.0 DETAILED OPERATION
3.2.2.3 Locate
If a satellite that doesn’t have ephemeris data associated with it is selected, the LOCATE mode will
perform exactly as described in the baseline manual.
If a satellite with ephemeris data associated with it is selected (see 3.2.2.3.1 below), LOCATE mode will
perform an operation to characterize the tilt of the antenna platform. Additionally LOCATE will calculate
the azimuth and elevation pointing solution based on the current date/time and ephemeris data rather
than assuming that the satellite is in a geostationary (non-inclined) orbit.
3.2.2.3.1 Satellite Selection
To enable ephemeris tracking operation, a satellite must be described as having ephemeris data
associated with it. If no ephemeris data is associated with the satellite, the LOCATE operation will be the
same as described in the baseline manual.
NOTE: a satellite may be described as having an inclined orbit (inclination greater than 0) without having
ephemeris data associated with it. In this case, the LOCATE and TRACK modes will operate as if the
ephemeris option is not present.
Only satellites programmed via the user preset list may have ephemeris data associated with them. In
LOCATE mode, manual entry of ephemeris data is not provided since so much additional information is
required. Likewise SATLIST data will not contain ephemeris data since the ephemeris data becomes
obsolete in a matter of only weeks.
Associating ephemeris data with a preset satellite is discussed in section 3.3.1.1.4
Preset Satellite List
When the preset satellite list is selected, the EPHEM field describes whether or not the satellite has
ephemeris data associated with it.
The following screen shows a satellite that has Two Line Element (TLE) set data associated with it.
LOCATE
# NAME LON INC BAND EPHEM
1 BRASIL A1 79.0W 2 C TLE
<SCR>THRU PRESET LIST <BKSP>EXIT
The EPHEM field may also indicate “NONE” if no ephemeris data is associated with the satelllite.
Selecting a satellite with associated ephemeris data will trigger unique actions described below.
3.2.2.3.2 LOCATE Automatic Movement
When the LOCATE screen initially displays a target for a satellite with ephemeris data, the AZIM and
ELEV targets are those calculated as if the satellite has no inclination (nominal position).
After the polarization selection (if applicable), the LOCATE function will perform a series of movements to
estimate the tilt of the platform. If tilt was previously estimated this routine will not be accomplished.
(9 páginas)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentários a estes Manuais