i IS-GPS-200G
05 Sep 2012
REVISION RECORD
REV
DESCRIPTION
DOCUMENT
DATE
APPROVED
NC
Initial Release
25 Jan 1983
A
Incorporates IRN-200NC-001, IRN-200NC-002, and
IRN-200NC-003
25 Sep 1984
B
Incorporates IRN-200A-001A
30 Nov 1987
C
Incorporates IRN-200B-001 thru IRN-200B-007
10 Oct 1993
C
Re-formatted in Microsoft Word 6.0 in GEMS
compatible format
10 Oct 1993
12 Jan 1996
C
Changed distribution status to Public Release
25 Sep 1997
20 Oct 1997
D
Incorporates IRN-200C-001 thru IRN-200C-005R1,
change ICD-GPS-200 to IS-GPS-200, introduce and
specify the requirements of Improved Clock and
Ephemeris (ICE) message for L2 C signal, and other
additional updates
7 Dec 2004
23 Nov 2004
IRN-
200D-001
Adds additional PRN sequences to Section 6
7 Mar 2006
9 Mar 2006
E
GPS IIIA Incorporations
8 Jun 2010
8 June 2010
F
Incorporates
(IRN-IS-200E-001 (RFC 16B - Pseudorandom Noise
(PRN) Expansion
IRN-IS-200E-002 (RFC 77B - Public Document
Management (GPS III terminology and Space Service
Volume (SSV) group delay))
IRN-IS-200E-003 (RFC 86 - User Range Accuracy
(URA) Definition)
IRN-IS-200E-004 (RFC 89 - Almanac Intervals)
IRN-IS-200E-005 (RFC 91A - Civil Navigation
(CNAV) Durations)
IRN-IS-200E-006 (RFC 93 - Technical Note 36)
IRN-IS-200E-007 (RFC 97 - Pseudorange Parameters)
21 Sep 2011
05 Mar 2012
G
IRN-IS-200F-001
05 Sep 2012
31 Jan 2013
IRN-IS-200F-002 (RFC 139B – Public Signals-in-
Space Updates
ii IS-GPS-200G
05 Sep 2012
TABLE OF CONTENTS
1 INTRODUCTION .................................................................................................................. 1
1.1 Scope. ............................................................................................................................... 1
1.2 IS Approval and Changes. ................................................................................................ 1
2 APPLICABLE DOCUMENTS .............................................................................................. 1
2.1 Government Documents. .................................................................................................. 1
2.2 Non-Government Documents. ......................................................................................... 2
3 REQUIREMENTS .................................................................................................................. 3
3.1 Interface Definition. ......................................................................................................... 3
3.2 Interface Identification. .................................................................................................... 3
3.2.1 Ranging Codes. ......................................................................................................... 3
3.2.2 NAV Data. .............................................................................................................. 12
3.2.3 L1/L2 Signal Structure. ........................................................................................... 12
3.3 Interface Criteria. ........................................................................................................... 13
3.3.1 Composite Signal. ................................................................................................... 13
3.3.2 PRN Code Characteristics....................................................................................... 19
3.3.3 Navigation Data. ..................................................................................................... 38
3.3.4 GPS Time and SV Z-Count. ................................................................................... 39
4 NOT APPLICABLE ............................................................................................................. 42
5 NOT APPLICABLE ............................................................................................................. 43
6 NOTES .................................................................................................................................. 44
6.1 Acronyms ....................................................................................................................... 44
6.2 Definitions ...................................................................................................................... 47
6.2.1 User Range Accuracy. ............................................................................................ 47
6.2.2 SV Block Definitions. ............................................................................................. 48
iii IS-GPS-200G
05 Sep 2012
6.2.3 Operational Interval Definitions. ............................................................................ 49
6.2.4 GPS Week Number. ................................................................................................ 49
6.2.5 L5 Civil Signal. ....................................................................................................... 49
6.3 Supporting Material........................................................................................................ 49
6.3.1 Received Signals. .................................................................................................... 49
6.3.2 Extended Navigation Mode (Block II/IIA). ............................................................ 51
6.3.3 Block IIA Mode (Block IIR/IIR-M) and Extended Navigation Mode (Block II-F).
52
6.3.4 Extended Navigation Mode (GPS III). ................................................................... 53
6.3.5 Autonomous Navigation Mode. .............................................................................. 53
6.3.6 Additional PRN Code Sequences. .......................................................................... 54
6.3.7 Pre-Operational Use. ............................................................................................... 62
6.4 Operational Protocols. .................................................................................................... 62
6.4.1 Lower PRN Numbers Versus Upper PRN Numbers .............................................. 62
6.4.2 PRN Number Consistency ...................................................................................... 63
6.4.3 PRNs 33 and 37 ...................................................................................................... 63
6.4.4 PRNs 33 through 63 ................................................................................................ 63
6.4.5 Health Code Setting of ‘11110’ .............................................................................. 63
10 APPENDIX I. LETTERS OF EXCEPTION ....................................................................... 64
10.1 Scope. ......................................................................................................................... 64
10.2 Applicable Documents. .............................................................................................. 64
10.3 Letters of Exception. ................................................................................................... 64
20 APPENDIX II. GPS NAVIGATION DATA STRUCTURE FOR LNAV DATA, D(t), FOR
PRN 1-32 ...................................................................................................................................... 73
20.1 Scope. ......................................................................................................................... 73
20.2 Applicable Documents. .............................................................................................. 73
iv IS-GPS-200G
05 Sep 2012
20.2.1 Government Documents. ........................................................................................ 73
20.2.2 Non-Government Documents. ................................................................................ 73
20.3 Requirements. ............................................................................................................. 74
20.3.1 Data Characteristics. ............................................................................................... 74
20.3.2 Message Structure. .................................................................................................. 74
20.3.3 Message Content. .................................................................................................... 85
20.3.4 Timing Relationships. ........................................................................................... 125
20.3.5 Data Frame Parity. ................................................................................................ 131
30 APPENDIX III. GPS NAVIGATION DATA STRUCTURE FOR CNAV DATA, D
C
(t) 134
30.1 Scope. ....................................................................................................................... 134
30.2 Applicable Documents. ............................................................................................ 134
30.2.1 Government Documents. ...................................................................................... 134
30.2.2 Non-Government Documents. .............................................................................. 134
30.3 Requirements. ........................................................................................................... 134
30.3.1 Data Characteristics. ............................................................................................. 134
30.3.2 Message Structure. ................................................................................................ 135
30.3.3 Message Content. .................................................................................................. 136
30.3.4 Timing Relationships. ........................................................................................... 183
40 APPENDIX IV GPS NAVIGATION DATA STRUCTURE FOR LNAV DATA, D(t), FOR
PRN 33-63 .................................................................................................................................. 188
40.1 Scope ........................................................................................................................ 188
40.2 Applicable Documents ............................................................................................. 188
40.3 Requirements. ........................................................................................................... 188
40.3.1 Data Characteristics .............................................................................................. 188
40.3.2 Message Structure ................................................................................................. 188
