PseudorangeObservation Object

The PseudorangeObservation objects holds pseudo-range (one-way range) Measurements associated with a GPS constellation satellite's signal being processed by a GPSReceiver on a Spacecraft at an instant in time. The Measurements for a PseudorangeObservation can include C1, C2, P1, P2, and IonoFree.

Available In Editions:

Timing Precision Mode

This page describes functionality in millisecond timing precision mode. Millisecond timing precision mode is deprecated and will be removed in a future release. We recommend that you migrate your Mission Plans to nanosecond timing precision mode.

Signatures	Description
PseudorangeObservation()	Create a PseudorangeObservation object without associating it with any other objects.
PseudorangeObservation(Spacecraft objectTransmittingSignal, GPSReceiver objectBeingMeasured)	Create a PseudorangeObservation object, and associate it with the "objectTransmittingSignal" and "objectBeingMeasured".
PseudorangeObservation(Spacecraft objectTransmittingSignal, GPSReceiver objectBeingMeasured, Sensor sensorReceivingSignal)	Create a PseudorangeObservation object, and associate it with the "objectTransmittingSignal", "objectBeingMeasured", and "sensorReceivingSignal".

Name	Description	Attributes
DeclaredName	The name of the object as declared.	Type: String Access: Read-Only
Name	The name displayed for this object in output windows such as views, plots, and reports.	Type: String Access: Read/Write
ObjectId	The unique identifier for the object.	Type: Variable Access: Read-Only
ObjectType	The type of the object.	Type: String Access: Read-Only

Name	Description
ClearSavedStates	Clears previous saved states for this object.
GetFromFile	Load the object state from the specified FreeFlyer object file.
GetFromString	Load the object state from the specified string.
PutToFile	Convert the object state to FreeFlyer object xml and write to a file.
PutToString	Convert the object state to FreeFlyer object xml and return as a string.
ReferenceEquals	Returns 1 if the argument refers to the calling object and 0 otherwise.
Restore	Restore an object's state from a previously saved state.
Save	Save the object's state so that it can be restored later.
SetObjectBeingObserved	Set the given object as the Object Being Observed for this Observation.
SetObserver	Set the given object as the Observing Object for this Observation.

Name

Description

Attributes

The C/A code pseudorange measurement at the L1 frequency, in units of km.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo Pseudoranges array instead.

Type: Measurement

Access: Read-Only

The C/A code pseudorange measurement at the L2 frequency, in units of km.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo Pseudoranges array instead.

Type: Measurement

Access: Read-Only

The Doppler-shift measurement at the L1 frequency.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo DopplerShifts array instead.

Type: Measurement

Access: Read-Only

The Doppler-shift measurement at the L2 frequency.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo DopplerShifts array instead.

Type: Measurement

Access: Read-Only

IonoFree

The derived iono-free pseudorange value computed as a function of the C1 and C2, or P1 and P2 measurements.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo IonoFreePseudoranges array instead.

Type: Measurement

Access: Read-Only

The carrier-phase measurement at the L1 frequency.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo CarrierPhases array instead.

Type: Measurement

Access: Read-Only

The carrier-phase measurement at the L2 frequency.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo CarrierPhases array instead.

Type: Measurement

Access: Read-Only

ObjectBeingObserved

The GPS Receiver attached to the spacecraft being estimated.

This property has been Deprecated. Please use GNSSObservation.ObjectBeingObserved instead.

Type: Object

Access: Read-Only

ObservedEpoch

The epoch of the Observation in TAI.

This property has been Deprecated. Please use GNSSObservation.ObservedEpoch instead.

Type: Variable

Access: Read/Write

Units: day

ObservedSensor

The Sensor attached to the GPS Receiver 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 has been Deprecated. Please use GNSSObservation.ObservedSensor instead.

Type: Sensor

Access: Read-Only

Observer

The GPS Spacecraft transmitting the pseudorange signal.

This property has been Deprecated. Please use GNSSObservation.Observer instead.

Type: Object

Access: Read-Only

The P-code pseudorange measurement at the L1 frequency, in units of km.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo Pseudoranges array instead.

Type: Measurement

Access: Read-Only

The P-code pseudorange measurement at the L2 frequency, in units of km.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo Pseudoranges array instead.

Type: Measurement

Access: Read-Only

PRN

The PRN code of the observing GPS satellite.

This property has been Deprecated. Please use GNSSObservation ObservingSystem and SatelliteId properties instead.

Type: Variable

Access: Read-Only

The raw signal strength or SNR measurement (as given by the receiver) at the L1 frequency.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo SignalStrengths array instead.

Type: Measurement

Access: Read-Only

The raw signal strength or SNR measurement (as given by the receiver) at the L2 frequency.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo SignalStrengths array instead.

Type: Measurement

Access: Read-Only

UseC1

A flag indicating whether or not the C1 Pseudorange measurement is to be used.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo PseudorangeProcessingOption instead.

Type: Variable

Access: Read/Write

UseC2

A flag indicating whether or not the C2 Pseudorange measurement is to be used.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo PseudorangeProcessingOption instead.

Type: Variable

Access: Read/Write

UseIonoFree

A flag indicating whether or not the iono-free derived pseudorange measurement is to be used. This is only available if C1 and C2, or P1 and P2 are available.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo IonoFreeProcessingOption instead.

Type: Variable

Access: Read/Write

UseIonosphericCorrection

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

This property has been Deprecated. Please use GNSSObservation GPS or Galileo UseIonosphericCorrection instead.

Type: Variable

Access: Read/Write

UseMeasurementWeighting

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

This property has been Deprecated. Please use GNSSObservation GPS or Galileo UseMeasurementWeighting instead.

Type: Variable

Access: Read/Write

UseP1

A flag indicating whether or not the P1 Pseudorange measurement is to be used.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo PseudorangeProcessingOption instead.

Type: Variable

Access: Read/Write

UseP2

A flag indicating whether or not the P2 Pseudorange measurement is to be used.

This property has been Deprecated. Please use GNSSObservation GPS or Galileo PseudorangeProcessingOption instead.

Type: Variable

Access: Read/Write

WasUnderweightingUsed

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

This property has been Deprecated. Please use GNSSObservation.WasUnderweightingUsed instead.

Type: Variable

Access: Read-Only