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FirstGPS Starter Kit User Guide
45
Using the FirstGPS API
A
1.4.11
npNavFixType
npNavFixType is used to store and report all pertinent information
about the current fix.
Data Type Variable Description
npFixChType tFixCh Channel dependent fix information.
npFixType tRawFix Raw position in latitude, longitude, Datum alt.
npFixType tFiltFix Filtered position in latitude, longitude, Datum alt.
DBL dblDatumToMslAlt Altitude conversion from Datum to MSL.
DBL dblPosECEF[3] Raw ECEF position.
FLT fltVelECEF[3] Raw ECEF velocities.
DBL dblOscBias Oscillator bias in meters.
FLT fltOscFreq Oscillator frequency in meters/second.
DBL dblTimeTag GPS time of fix in seconds. The range is from 0 to
604799.
U16 usWeekTag GPS week of fix.
npDopType tDop Dilution of precision numbers. For more
information, refer to npDopType, page 41.
S16 sDatumIndex 0 = WGS84 = default.
U8 ucNumSvsUsed Number of SVs used.
U8 ucStatus Indicates the validity status of this fix. For more
information, refer to Position Fix Status, page 55.
U8 ucSource Indicates the source of this position fix. For more
information, refer to Position Fix Source, page 54.
U8 ucDgpsFlag Differential GPS status. For more information,
refer to Position Fix DGPS Status, page 55.