GNSS Receiver Scope Functions

CAgAttr SiteSolution(string RinexFile, string SP3File, bool bSP3RepresentsAntennaPhaseCenter, string solutionEpoch, string observationStartTime, string observationStopTime)

This is a helper function for the ODTK GenerateSiteSolution utility. It generates a GNSS receiver position and clock solution from pseudo-range observations in RINEX format. This function has an additional (last) argument that takes in a string with the name of GNSS Constellation ("GPS," "GALILEO," "GLONASS,"etc.) that limits the algorithm to using only observations originated from GNSS satellites that belong to the constellation.

Parameters

RinexFile string The path of a RINEX data file
SP3File string The path of a SP3 file of GNSS satellite ephemeris
bSP3RepresentsAntennaPhaseCenter bool Set to true if the ephemeris in the SP3 file is that of the GNSS satellite antenna phase center
solutionEpoch string A time string in UTCG
observationStartTime string A time string in UTCG
observationStopTime string A time string in UTCG

Return Value

The function returns a CAgAttr object with the following members:

NumberOfObs CAgAttrInt The number of observations used in solution
X CAgAttrQuantity The Earth-fixed X coordinate of receiver location estimate
Y CAgAttrQuantity The Earth-fixed Y coordinate of receiver location estimate
Z CAgAttrQuantity The Earth-fixed Z coordinate of receiver location estimate
ClockPhase CAgAttrQuantity The receiver clock offset from GNSS Time
ClockFrequency CAgAttrDouble The receiver clock offset rate in seconds/second
ErrorMsg CAgAttrBool An error message string if method fails, empty if no errors
Succeed CAgAttrString True if the method is successful

Example VBS:

Copy 
rinex = "c:\tmp\GpsSite.rnx"
sp3 = "c:\tmp\GpsSite.sp3"
epoch = "1 May 2006 00:05:00.000"
start = "1 May 2006 00:02:00.000"
stop = "1 May 2006 00:09:00.000"
set facRcvr = sc.TrackingSystem(0).Facility(0).GNSSReceiver(0)
set retVal = facRcvr.SiteSolution(rinex, sp3, true, epoch, start, stop)
odtk.WriteMessage "Solution X: " & retVal.X.GetIn("km"), "debug"