IS-GPS-200J
22 May 2018
ii
3.3.1.7.3 Space Service Volume Group Delay Differential. ................................................................. 18
3.3.1.8 Signal Coherence. ......................................................................................................................... 18
3.3.1.9 Signal Polarization. ....................................................................................................................... 18
3.3.2 PRN Code Characteristics.................................................................................................................... 18
3.3.2.1 Code Structure. ............................................................................................................................. 18
3.3.2.2 P-Code Generation. ....................................................................................................................... 20
3.3.2.3 C/A-Code Generation. .................................................................................................................. 29
3.3.2.4 L2 CM-/L2 CL-Code Generation. ................................................................................................ 34
3.3.3 Navigation Data. .................................................................................................................................. 36
3.3.3.1 Navigation Data Modulation (L2 CM). ........................................................................................ 36
3.3.3.1.1 Forward Error Correction. ..................................................................................................... 36
3.3.4 GPS Time and SV Z-Count. ................................................................................................................ 37
6 NOTES ............................................................................................................................................................... 40
6.1 Acronyms .................................................................................................................................................... 40
6.2 Definitions................................................................................................................................................... 43
6.2.1 User Range Accuracy. ......................................................................................................................... 43
6.2.1.1 User Differential Range Accuracy. ............................................................................................... 44
6.2.2 SV Block Definitions. .......................................................................................................................... 44
6.2.2.1 Developmental SVs. ..................................................................................................................... 44
6.2.2.2 Operational SVs. ........................................................................................................................... 44
6.2.2.2.1 Block II SVs. .......................................................................................................................... 44
6.2.2.2.2 Block IIA SVs. ....................................................................................................................... 44
6.2.2.2.3 Block IIR SVs. ....................................................................................................................... 45
6.2.2.2.4 Block IIR-M SVs. .................................................................................................................. 45
6.2.2.2.5 Block IIF SVs. ....................................................................................................................... 45
6.2.2.2.6 GPS III SVs............................................................................................................................ 45
6.2.3 Operational Interval Definitions. ......................................................................................................... 45
6.2.3.1 Normal Operations. ....................................................................................................................... 45
6.2.3.2 Short-term Extended Operations................................................................................................... 45
6.2.3.3 Long-term Extended Operations. .................................................................................................. 45
6.2.4 GPS Week Number. ............................................................................................................................. 46
6.2.5 L5 Civil Signal. .................................................................................................................................... 46
6.2.6 Reserved Data ...................................................................................................................................... 46
6.2.7 Valid Range ......................................................................................................................................... 46
6.2.8 Invalid .................................................................................................................................................. 46
6.2.9 Clock, Ephemeris, Integrity (CEI) Data Set. ....................................................................................... 46
6.2.9.1 Core CEI Data Set. ........................................................................................................................ 46
6.2.10 CEI Data Sequence Propagation. ....................................................................................................... 48
6.3 Supporting Material .................................................................................................................................... 49
