EU Convert - Converts raw tracking data counts to engineering units, using appropriate conversion factors. Tropospheric and ionospheric delay calibrations make use of real-time calibration measurements from the Range as well as orbit ephemeris information for path modeling. Compute and Validate Residuals - Orbit ephemeris and RGF information are used to calculate the differences between actual measurements and predicted measurements at each point. Edit controls are applied to residuals to identify and reject excessively noisy or biased measurements. An Anomaly Knowledge Base provides constraints and rules used to identify corrective action needed for malfunctioning hardware or software.
Residual computation is also a necessary subfunction of O rbit Determination .
Demodulate Range Rate - Antenna motion modulation of range rate from spinning SVs is filtered, using range rate residuals. The measurement corrections from filtering are then used for final residual validation and measurement editing.