Operation
TABLE 5-18 STEPTRACK STATISTICS
FIELD DESCRIPTION
no. of cycles
Indicates the number of complete steptrack cycles (both AZ and EL peaking) performed to
achieve peaking constraints.
SP_LOOP Indicates the number of loops required by the fitting algorithm.
SOL-MAX DIFF
Indicates the calculated radial difference in percentage of beamwidth between the
position where maximum signal was recorded and the adjusted peak position.
SP_FIT Minimized least squared error between internal beam model and collected data.
SP_STD Maximum standard deviation of original recorded during stepping operations.
SP_WT Weight value used for filtering steptrack peak estimates.
CAL STEP Estimated step to peak antenna (in percentage of beamwidth).
5.8.5.4 OPT Statistics
OPT statistics provides useful information only when OPT is in operation. The
statistics are described in Table 5-19. Information on this screen is intended for
use by General Dynamics personnel.
TABLE 5-19 OPT STATISTICS
FIELD DESCRIPTION
STvsAST delta
The short-term versus AST delta is the calculated radial error in percentage of
beamwidth between the last steptrack solution and the short-term solution at that
time.
LTvsAST delta
The long-term versus AST delta is the calculated radial error in percentage of
beamwidth between the last steptrack solution and the long-term solution at that time.
LTvsST delta
The difference between the LT solution and the ST solution at the last steptrack
operation.
Sol. in use Displays, in real time, the OPT model being followed.
Mean The mean signal level being used in OPT (real time).
Std. Dev.
The standard deviation of the signal used to determine when the signal is too noisy to
steptrack (real time).
ST Sol The RMS of the deviations for the last short-term solution created.
LT2b Sol
The RMS of the deviations for the last long-term solution created using the two-body
propagator.
LTmb Sol
The RMS of the deviations for the last long-term solution created using the multibody
propagator.
ST SOLVER Indicates if the short-term solver task is awake or asleep.
LT SOLVER Indicates if the long-term solver task is awake or asleep.
5-42
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