General Dynamics 7200 User Manual

Operation
5.8.2.6.3.3 Intelsat 11-Element Tracking Mode Parameters
Table 5-12 describes the Intelsat 11-element (IESS412) parameters.
TABLE 5-12 INTELSAT 11-ELEMENT PARAMETERS
PARAMETER DESCRIPTION
Year
Year portion of the epoch time on which the ephemeris is based; value must be
a four-digit number (1990; 2001).
Month
Month portion of the epoch time on which the ephemeris is based; input is a
two-digit integer value (01 - 12).
Day
Day portion of the epoch time on which the ephemeris is based; input is a two-
digit integer value (01 - 31).
Hour
Hour portion of the epoch time on which the ephemeris is based; input is a two-
digit integer value (00 -23).
Minute
Minute portion of the epoch time on which the ephemeris is based; input is a
two-digit integer value (00 - 59).
Second
Second portion of the epoch time on which the ephemeris is based; input is a
two-digit integer value (00 - 59).
LM0 [deg. E]
Mean longitude (degrees east of Greenwich). Labeled LM0 on the 11-parameter
ephemeris from Intelsat.
LM1 [deg/day] Mean longitude drift rate (degrees east per day).
LM2 [deg/day/day] Mean longitude drift acceleration (degrees east per day).
LONC [deg. E] Amplitude of the cosine component of the longitude oscillation (degrees east).
LONC1 [deg/day] Rate of change in LONC (degrees east per day).
LONS [deg. E] Amplitude of the sine component of the longitude oscillation (degrees east).
LONS1 [deg/day] Rate of change in LONS (degrees east per day).
LATC [deg. N] Amplitude of the cosine component of the latitude oscillation (degrees north).
LATC1 [deg/day] Rate of change in LATC (degrees north per day).
LATS [deg. N] Amplitude of the sine component of the latitude oscillation (degrees north).
LATS1 [deg/day] Rate of change in LATS (degrees north per day).
Longitude at 170 hours
[deg. E]
Satellite longitude at epoch plus 170 hours (degrees east).
Latitude at 170 hours
[deg. N]
Satellite latitude at epoch plus 170 hours (degrees north).
Polarization angle [deg]
POL angle used with Intelsat tracking if POL is enabled. If the ACU does not
control POL, this value is irrelevant.
Bias angles [deg]
Angles added to the look angles to determine the target position. These exist
because the look angles can only be edited at Supervisor level, but the bias
angles can be edited at Operator level, allowing periodic repeaking of the target
without losing the base position.
Pointing update time
[ms]
Controls the f
requency at which new look angles are calculated from the
Intelsat parameters. The nominal value is 1000 milliseconds (ms) (1 second).
The value can be increased to lower the workload on the CPU.
5-28

General Dynamics 7200 Specifications

General

Brand	General Dynamics
Model	7200
Category	Control Systems
Language	English