Name

Description

AngleType

A flag indicating which angle pair to process, either Azimuth/Elevation or Right Ascension/Declination measurements.

Azimuth

The Azimuth measurement associated with this GroundStationObservation, in units of radians.

CarrierLockStatus

Carrier lock status. 0 => Off; 1 => Open; 2 => Acquiring; FFT Search; 3 => Acquiring, Waiting for Lock Decision; 4 => In Lock; 5 => Out of Lock

DeclaredName

The name of the object as declared.

Declination

The Declination measurement associated with this GroundStationObservation, measured in the True Equator, Mean Equinox frame.

DeltaFrequency

The change in downlink frequency since the last sample, divided by the downlink frequency at this time tag.

DisplayName

The name displayed for this object in output windows such as views, plots, and reports.

DownlinkChannelNumber

Downlink channel number; 0 implies unknown.

DownlinkRangeObservable

Downlink range observable. Includes all measurement adjustments (station calibration, time tag adjustments, spacecraft delay, and Zheight)

DownlinkStationCalibration

Uplink Station Calibration

DownlinkZHeightCorrection

Downlink ZHeight correction

Elevation

The Elevation measurement associated with this GroundStationObservation, in units of radians.

ExcitedScalarDenominator

ExcitedScalarDenominator property of the observing GroundStation. This is used in determining the Spacecraft turn around ratio.

ExcitedScalarNumerator

ExcitedScalarNumerator property of the observing GroundStation. This is used in determining the Spacecraft turn around ratio.

IntegratedFrequency

The integrated Frequency over the transmission time divided by the transmission time.

LastComponentOfRanging

Last component of ranging; this is used to determine the range code length on the signal (which determines the Range Ambiguity as 2^(6+C2) RU))

MeasuredRange

Measured Range; does not include compensation for station calibration. This maps to the meas_rng field in TRK234 data.

ObjectBeingObserved

The Spacecraft being tracked by the Ground Antenna.

ObjectId

The unique identifier for the object.

ObjectType

The type of the object.

ObservedEpoch

The epoch of the Observation in TAI.

ObservedSensor

The Sensor attached to the Transponder being observed. The Sensor's X, Y, and Z position properties will be used to model an offset from the origin of the Spacecraft BCS when modeling measurements. This property is optional.

Observer

The Ground Antenna that is transmitting the tracking signal.

PhaseCountParts

Total Count Phase observable of current record. This is stored as 3 values in an Array. The high part, which is total integer phase cycles divided by 2^32, is the first array element. The low part, which is Total integer phase cycles modulo 2^32, is the second array element. The fractional count, which is Total integer phase cycles multiplied by 2^32, is the third array element.

PhaseCountStartEpoch

Epoch of the start of the phase count transmission.

PredictedRoundTripLightTime

Predicted roundtrip light time

PredictsMode

The PredictsMode field from the record. 0 => No Predicts, 1 => 1way, 2 => 2way, 3 => 3way, 4 => unknown.

PreviousPhaseCountObservationEpoch

Epoch of the last phase count observation.

PreviousPhaseCountParts

Total Count Phase observable of previous record. This is stored as 3 values in an Array. The high part, which is total integer phase cycles divided by 2^32, is the first array element. The low part, which is Total integer phase cycles modulo 2^32, is the second array element. The fractional count, which is Total integer phase cycles multiplied by 2^32, is the third array element.

Range

The Range measurement associated with this GroundStationObservation, in units of km.

RangeAmbiguityCount

Number of full length range codes on the signal.

RangeMeasurementType

Range measurement type. Type of sequential measurement.

RangeModulo

Range modulo value. Range measurement modulo (ambiguity).

RangeObservable

Range Observable; includes all station calibration and other adjustments. This maps to the rng_obs field in TRK234 data.

RangeObservableToUse

Indicates which range observable to use. If this is set to uncorrected then the raw range (meas_rng) is used, and the calibrations / corrections are applied manually. Otherwise the corrected range observable (rng_obs) is used.

RangeRate

The RangeRate measurement associated with this GroundStationObservation, in units of km/s.

ReceiveInPhaseTime

Receive Inphase time. Offset from time tag of time of zero phase on downlink range signal

ReceivingAntenna

The Ground Antenna that is receiving the tracking signal.

ReceptionTimeTagDelay

The reception timetag delay for the antenna.

RightAscension

The Right Ascension measurement associated with this GroundStationObservation, measured in the True Equator, Mean Equinox frame.

TimeTagFrequency

Frequency recorded at the measurement time tag.

TransmitInPhaseTime

Transmit Inphase time. Offset from time tag of time of zero phase on uplink range signal generation.

TransmitTimeTagDelay

The transmit timetag delay for the antenna.

TransmittingAntenna

The Ground Antenna that is transmitting the tracking signal.

TurnAroundDenominator

Transponder turn around ratio denominator.

TurnAroundNumerator

Transponder turn around ratio numerator.

UplinkStationCalibration

Uplink Station Calibration

UplinkZHeightCorrection

Uplink ZHeight correction

UseAzimuth

A flag indicating whether or not the Azimuth measurement will be used.

UseDeclination

A flag indicating whether or not the Declination measurement will be used.

UseDeltaFrequencyCorrection

Specifies whether to use the DeltaFrequency as a correction to the timetag / integrated frequency.

UseElevation

A flag indicating whether or not the Elevation measurement will be used.

UseIonosphericCorrection

A flag indicating whether or not the Ionospheric correction will be used. The Ionospheric correction is only calculated when the Observing Ground Antenna references the Earth as its Central Body.

UseLightTimeCorrection

A flag indicating whether or not the LightTime correction will be used.

UseMeasurementWeighting

A flag indicating whether or not to perform measurement weighting using internal geometricbased expressions. Measurement weighting should be turned off if a custom Measurement Noise model is implemented at the script level.

UseRange

A flag indicating whether or not the Range measurement will be used.

UseRangeRate

A flag indicating whether or not the RangeRate measurement will be used.

UseRightAscension

A flag indicating whether or not the Right Ascension measurement will be used.

UseTroposphericCorrection

A flag indicating whether or not the Tropospheric correction will be used. The Tropospheric correction is only calculated when the Observing Ground Antenna references the Earth as its Central Body.

WasUnderweightingUsed

A flag indicating whether or not measurement underweighting was used as part of the filter state and covariance update for this observation.
