IS-GPS-800A - US Coast Guard Navigation Center

Table 3.5-8.Differential Correction ParametersParameterNo. ofBits**ScaleFactor(LSB)EffectiveRange***UnitsPRN IDa f0a f1UDRAiAUDRASV Clock Bias CorrectionSV Clock Drift CorrectionUser Differential RangeAccuracy IndexAlpha Correction to EphemerisParametersBeta Correction to EphemerisParametersGamma Correction to EphemerisParametersAngle of Inclination CorrectionAngle of Right AscensionCorrectionSemi-Major CorrectionChange Rate of User DifferentialRange Accuracy Index.813*8*5*14*14*15*12*12*12*5*2 -352 -512 -342 -342 -322 -32see textsecondsseconds/secondsee textdimensionlessdimensionlesssemi-circlessemi-circles2 -32semi-circles2 -9 meterssee text* Parameters so indicated are in two’s complement notation;** See Figure 3.5-6 for complete bit allocation in subframe 3, page 5;*** Unless otherwise indicated in this column, effective range is the maximum range attainable withindicated bit allocation and scale factor.63 IS-GPS-800A8 June 2010