RC3000 Antenna Controller Appendix TLE Two Line Element Tracking
TLE-7
3.2.2.9 Track
How the basic TRACK mode sequences through submodes is described in the Inclined Orbit Tracking
appendix (APP-TRK). The ephemeris tracking option supplies a new TRACK submode called “EPHEM
TRACK”.
The following paragraphs describes how the existing tracking submodes are modified and details the
EPHEM TRACK submode in section 3.2.2.9.6.
When TRACK mode is first entered, the track_signal_source configuration item determines whether or not
TRACK will initially enter STEP TRACK submode or not.
If the track_signal_source is set to SS1 or SS2, TRACK mode assumes there will a signal strength
indication available and will enter STEP TRACK to peak up on the signal strength. Section 3.2.2.9.1
describes how the STEP TRACK mode operates differently if the satellite being tracked has ephemeris
data associated with it.
If the track_signal_source is set to NONE (only available with the EPHEM option), TRACK will initially
enter a
manual jog screen.
3.2.2.9.1 Step Track
In order for ephemeris tracking to be enabled, at least one initial step track operation must be performed
to determine azimuth and elevation offsets. After the first step track peakup, the current azimuth and
elevation positions are compared to the positions calculated by the ephemeris model. These differences
will be used as offsets if the TRACK mode switches to EPHEM_TRACK.
The STEP_TRACK submode will pass control to the EPHEM_TRACK submode if signal strength is lost
(and the azimuth and elevation offsets have been initialized).
3.2.2.9.2 Memory Track
If TRACK is in EPHEM_TRACK when it is time to store a track table entry, that table entry will be
annotated with an "e" when viewed from the TRACK MENU screen.
3.2.2.9.3 Track Search
When ephemeris data is available, there will be no need to transition to the TRACK SEARCH submode.
The NORAD model will predict the azimuth and elevation positions.
3.2.2.9.4 Track Menu
<1> ALIGN NOW
If TRACK MENU is entered from EPHEM, this action will reposition the dish according to the calculated
targets for the current date and time.
(9 stránky)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Komentáře k této Příručce