Raw Data Observer

This section contains a description of the SkydelRawDataObserverInterface supported by Skydel.

Real Time Raw Data

During simulation initialization, Skydel calls getUpdateIntervalMs to determine the update interval in milliseconds, at which raw data should be shared. If the returned value is zero, the runtime object will not be instantiated. Otherwise, Skydel will proceed to call the createRuntimeRawDataObserver method from each plug-in to obtain a SkydelRuntimeRawDataObserver*. Ownership of the returned pointer must be fully transferred to Skydel. This creation function also provides a map from IDs to strings, listing all enabled constellations and their corresponding signals.

During the simulation, Skydel will invoke the pushRawData method at the configured interval. This is done for every signal of every space vehicle in each simulated constellation, using the following data structure:

TimedRawData	Definition	Unit
elapsedTimeMs	Simulation elapsed time	millisecond
svsData	Raw data by constellation	vector of ConstellationRawData

ConstellationRawData	Definition	Unit
id	Constellation identifier	-
svs	Raw data by space vehicle	vector of SVRawData

SVRawData	Definition	Unit
id	Signal identifier	-
receiverAntennaAzimuth	Satellite’s azimuth from the receiver’s antenna position	radian
receiverAntennaElevation	Satellite’s elevation from the receiver’s antenna position	radian
rawDatas	Raw data by signal	vector of SignalRawData

SignalRawData	Definition	Unit
id	Space vehicle identifier	-
svElapsedTimeMs	Elapsed time of the SV at current simulation elapsed time	millisecond
position (x,y,z)	ECEF coordinates (meters) of the origin of the transmitted signal (satellite’s antenna phase center).	meter
positionError (x,y,z)	Error on the position	meter
bodyAzimuth	Azimuth angle of the satellite at the receiver relative to the North.	radian
bodyElevation	Elevation angle of satellite at the receiver relative to the North	radian
range	Geometrical distance between the satellite’s and receiver’s antennas	meter
adr	Accumulated doppler range	number of cycle
clockCorrection	Satellite's Clock Correction	second
clockNoise	Additional clock error not accounted for in navigation message	second
deltaAf0	Clock offset	second
deltaAf1	Clock drift	second/second
ionoCorrection	Ionospheric corrections	meter
tropoCorrection	Tropospheric corrections	meter
psrOffset	Pseudorange offset	meter
receiverAntennaGain	Receiver’s antenna gain	dBi
svAntennaAzimuth	Receiver’s azimuth from the satellite’s antenna position	radian
svAntennaElevation	Receiver’s elevation from the satellite’s antenna position	radian
relativePowerLevel	Signal’s relative power level corresponding to the sum of the global power offset, the user’s power offset, the receiver’s antenna gain and the satellite’s antenna gain	dB
doplerFrequency	Doppler frequency due to satellites' and receivers' antennas dynamics'	hertz
psrChangeRate	Pseudorange rate due to satellites' and receivers' antennas dynamics'	meters/second
isEcho	Is this signal an echo
echoPowerLoss	Multipath power offset relative to Line of Sight (LOS) signal	dB
echoDopplerOffset	Multipath frequency offset relative to LOS signal	hertz
echoCarrierPhaseOffset	Initial phase offset in multipath relative to LOS signal	radian
echoPsrOffset	Multipath pseudorange offset	meter
receiverCarrierPhaseOffset	Phase offset caused by the receiver’s antenna phase pattern	radian
satelliteCarrierPhaseOffset	Phase offset caused by the satellite’s antenna phase pattern	radian
calibrationOffset	Offset applied to the signal during Wavefront simulation. Used to compensate for hardware differences between elements	meter
psrSatTime	The elapsed time of the simulation when the signal was emitted from the satellite	millisecond
pseudorange	Pseudorange between the satellite’s and receiver’s antennas	meter
gpsTow	GPS time of week	second
gpsWeekNumber	GPS week number	-
sbas	SBAS time of the day	second

Dynamic User Interface

Same as SkydelPositionObsereverInterface, see Dynamic User Interface of Position Observer.