Main
GPSCard
2 MiLLennium GPSCard Software Version 4.50 Command Descripti ons Manual Rev 1
MiLLennium Command Descriptions Manual
Proprietary Notice
TABLE OF CONTENTS
Software License 9 Software Support 10 Foreword 11
1Quick Start 12
2 Command Descriptions 23
3 Data Logs 34
4 MiLLennium GPSCard Software Version 4.50 Command Descrip tions Manual Rev 1
A GPS Overview 62
B Multipath Elimination Technology 73
C Commands Summary 79
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 5
D Logs Summary 136
6 MiLLennium GPSCard Software Version 4.50 Command Descrip tions Manual Rev 1
E Comparison Of RT-2 And RT-20 225
F Standards and References 233 G Geodetic Datums 234 H Some Common Unit Conversions 236
I Information Messages 238
JListing Of Tables 242 K GPS Glossary of Terms 260 L GPS Glossary of Acronyms 268 M Index 270
FIGURES
8 MiLLennium GPSCard Software Version 4.50 Command Descrip tions Manual Rev 1
TABLES
Software License
SOFTWARE LICENSE
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 9
Software Support
SOFTWARE SUPPORT
10 MiLLennium GPSCard Software Version 4.50 Command Descr iptions Manual Rev 1
Foreword
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 11
FOREWORD
Congratulations!
Scope
Prerequisites
Whats New In Version 4.50?
1QUICK START
1.1 INSTALLATION
Graphical Interface
1.2 DATA LOGGING
Page
COMMONLY USED LOGS
1.3 DIFFERENTIAL OPERATION
Establish a Data Link
16 MiLLennium GPSCard Software Version 4.50 Command Descr iptions Manual Rev 1
Table 1-1 GPSCard Pseudorange Differential Initialization Summary
FIX POSITION lat lon height station id health
Initialization - Reference Station
FIX POSITION
Reference Station Remote Station
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 17
LOG BROADCAST DATA
1.4 RTK MODE
Data Communications Link
System Initialization
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 19
INITIALIZATION FOR RTCA-FORMAT MESSAGING (RT-2 OR RT-20)
1. At the reference station:
station id
2. At the remote station:
INITIALIZATION FOR RTCM59-FORMAT MESSAGING (RT-20 ONLY)
Monitoring Your RTK Output Data
Options for Logging Differential Corrections
SET DGPSTIMEOUT
USING RTCM SC-104 LOG TYPES
USING RTCA LOG TYPES
Initialization - Rover Station
ACCEPT COMMAND
LOG POSITION DATA AND OTHER USEFUL DATA
2COMMAND DESCRIPTIONS
2.1 GENERAL
Optional calculation of the checksum
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 25
2.2 STANDARD COMMAND TABLES
Table 2-1 Commands By Function Table
26 MiLLennium GPSCard Software Version 4.50 Command Descr iptions Manual Rev 1
Table 2-1 Commands By Function Table (continued)
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 27
Table 2-1 Commands By Function Table (continued)
Table 2-2 GPSCard Command Summary
DIFFERENTIAL REMOTE STATION
CLOCK INFORMATION, STATUS, AND TIME
Page
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 29
2.3 WAAS
Figure 2-2 The WAAS Concept
2.3.1 WAAS GPSCard
WAAS COMMANDS
2.4 SPECIAL DATA INPUT COMMANDS
2.4.1 Almanac Data
$ALMA...
$IONA...
$UTCA...
2.4.2 Differential Corrections Data
$PVAA/B XYZ POSITION, VELOCITY AND ACCELERATION
$REPA/B RAW GPS EPHEMERIS DATA
$RTCA... (RTCAA)
$RTCM... (RTCMA, $RTCM1A, $RTCM3A, $RTCM9A, $RTCM16A,$RTCM59A)
$TM1A/B RECEIVER TIME OF 1PPS
3 DATA LOGS
3.1 OUTPUT LOGGING
ONTIME
3.2 NOVATEL FORMAT DATA LOGS
General
ASCII Log Structure
Binary Log Structure
3.3 RTK
3.4 NMEA FORMAT DATA LOGS
General
3.5 GPS TIME VS. LOCAL RECEIVER TIME
38 MiLLennium GPSCard Software Version 4.50 Command Descr iptions Manual Rev 1
3.6 STANDARD LOG TABLES
Table 3-1 Logs By Function Table
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 39
Table 3-1 Logs By Function Table (continued)
SATELLITE TRACKING AND CHANNEL CONTROL
WAYPOINT NAVIGATION
DIFFERENTIAL REFERENCE STATION
40 MiLLennium GPSCard Software Version 4.50 Command Descr iptions Manual Rev 1
Table 3-1 Logs By Function Table (continued)
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 41
Table 3-2 GPSCard Log Summary
3.7 WAAS
3.7.1 WAAS GPSCard Logs
3.8 PASS-THROUGH LOGS
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 43
Figure 3-1 Pass-Through Log Data
3.8.1 Command Syntax
Example 1: log com2 com1a onchanged
3.8.2 ASCII Log Structure
log to-port from-port-A/B trigger
$port ID week seconds pass-through data *xx [CR][LF]
3.8.3 Binary Log Structure
4MESSAGE FORMATS
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 45
Table 4-1 Positioning Modes
4.1 RTCA-FORMAT MESSAGES
RTCA STANDARD LOGS
RTCA
4.2 RTCM-FORMAT MESSAGES
RTCM General Message Format
RTCM Standard Commands
RTCMRULE
RTCM16T
RTCM Standard Logs
50 MiLLennium GPSCard Software Version 4.50 Command Descr iptions Manual Rev 1
ASCII
BINARY
RTCM OR RTCM1
Page
RTCM3 REFERENCE STATION PARAMETERS RTK
RTCM9 PARTIAL SATELLITE SET DIFFERENTIAL CORRECTIONS
RTCM16 SPECIAL MESSAGE
RTCM1819 UNCORRECTED CARRIER PHASE AND PSEUDORANGE MEASUREMENTS RTK
RTCM22 RTCM EXTENDED REFERENCE STATION PARAMETERS RTK
RTCM59 TYPE 59N-0 NOVATEL PROPRIETARY MESSAGE RTK
RTCM RECEIVE ONLY DATA
4.3 CMR FORMAT MESSAGING
Using RT-2 or RT-20 with CMR Format Messages
4.4 RINEX FORMAT
4.4.1 COMMANDS
RINEX
4.4.2 LOGS
RINEX OBSERVATION AND NAVIGATION LOGS AND HEADERS
XKIN OBSERVATION KINEMATIC EVENT
XNAV NAVIGATION DATA RECORD
XNHD NAVIGATION HEADER
XOBS OBSERVATION DATA RECORD
Command example:
Log example:
XOHD OBSERVATION HEADER
or it will be generated automatically when logging is complete, using a command such as
Log example:
XSTA OBSERVATION STATIC EVENT
AGPS OVERVIEW
62 MiLLennium GPSCard Software Version 4.50 Command Descr iptions Manual Rev 1
Figure A-1 NAVSTAR Satellite Orbit Arra ngement
A.1 GPS SYSTEM DESIGN
The Space Segment
A.2 HEIGHT RELATIONSHIPS
What is a geoid?
What is an ellipsoid?
What is the relationship between a geoid and an ellipsoid?
64 MiLLennium GPSCard Software Version 4.50 Command Descr iptions Manual Rev 1
A.3 GPS POSITIONING
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 65
Figure A-3 Accuracy versus Precision
Single-point vs. Relative Positioning
66 MiLLennium GPSCard Software Version 4.50 Command Descr iptions Manual Rev 1
Figure A-4 Example of Differential Positioning
Static vs. Kinematic Positioning
Real-time vs. Post-mission Data Processing
A.3.1 DIFFERENTIAL POSITIONING
A.3.2 PSEUDORANGE ALGORITHMS
Pseudorange Differential Positioning
GPS SYSTEM ERRORS
Page
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Figure A-5 Single Point Averaging
70 MiLLennium GPSCard Software Version 4.50 Command Descr iptions Manual Rev 1
Dual Station Differential Positioning
Figure A-6 Typical Differential Configuration
THE REFERENCE STATION
THE REMOTE STATION
A.4 CARRIER-PHASE ALGORITHMS
Page
BMultipath Elimination Technology
B.1 MULTIPATH
Why Does Multipath Occur?
Consequences of Multipath Reception
B.2 HARDWARE SOLUTIONS FOR MULTIPATH REDUCTION
Antenna Site Selection
Antenna Designs
Antenna Ground Planes
NovAtels Internal Receiver Solutions for Multipath Reduction
NARROW CORRELATOR TRACKING TECHNOLOGY
SUMMARY
CCOMMANDS SUMMARY
ACCEPT
Page
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 81
ANTENNAPOWER
Table C-1 Antenna LNA Power Configuration
ASSIGN
CLOCKADJUST
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COMn
COMn_DTR
active [lead] [tail]
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COMn_RTS
active [lead] [tail]
Data
CONFIG
CRESET
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CSMOOTH
[L2 time]
DATUM
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DGPSTIMEOUT
ephem delay
DIFF_PROTOCOL Differential Protocol Control
RTCM/A/B LOGS
DYNAMICS
ECUTOFF
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EXTERNALCLOCK
Overview
++++=
Theory
Usage
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 95
externalclock user 1.0e-20 1.0e-24 1.0e-28
Table C-2 Default Values of Process Noise Elements
EXTERNALCLOCK option
EXTERNALCLOCK FREQUENCY
FIX HEIGHT
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FIX POSITION
station id [
stn health]
FIX VELOCITY
FREQUENCY_OUT
FRESET
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HELP
?
HELP
OR:
Figure C-1 HELP Command Screen Display
IONOMODEL
LOCKOUT
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LOG
[period] [offset] {hold}
trigger
[port]
106 MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1
MAGVAR
[std_dev]
Page
MESSAGES
POSAVE
RESET
RESETHEALTH
RESETHEALTHALL
RINEX Receiver-Independent Exchange Format
RTCM16T
Page
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RTKMODE
or
Page
Page
Page
SAVEALMA
Page
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SEND
Figure C-4 Using SEND Command
SENDHEX
SETDGPSID
SETHEALTH
SETL1OFFSET
SETNAV
Reference Description
SETTIMESYNC
UNASSIGN
UNASSIGNALL
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UNDULATION
Figure C-6 Illustration of Undulation
UNFIX
UNLOCKOUT
UNLOCKOUTALL
132 MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1
UNLOG
port
UNLOGALL
USERDATUM
VERSION
WAASCORRECTION
DLOGS SUMMARY
LOG DESCRIPTIONS
ALMA/B Decoded Almanac
ALMA
Page
Page
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 139
ALMB
Message ID = 16 Message byte count = 76
IONB FORMAT:
ALMB FORMAT: Message ID = 18 Message byte count = 120
Page
BSLA/B Baseline Measurement
BSLA
BSLB
Format: Message ID = 59 Message byte count = 100
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 143
Table D-1 GPSCard Solution Status
Table D-4 RTK Status for Position Type 4 (RT-2)
Table D-2 Position Type
Table D-3 RTK Status for Position Type 3 (RT-20)
CDSA/B Communication and Differential Decode Status
CDSA
Page
CDSB
Format: Mess age ID = 39 Message byte count = 128
CLKA/B Receiver Clock Offset Data
CLKA
CLKB
Format: Message ID = 02 Message byte count = 68
CLMA/B Receiver Clock Model
150 MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1
CLMB
Page
COM1A/B and COM2A/B Pass-Through Logs
DOPA/B Dilution of Precision
DOPA
DOPB
Format: Message ID = 07 Message byte count = 68+(sats*4)
ETSA/B Extended Tracking Status
ETSA
Example (carriage returns have been added between observations for clarity):
ETSB
Format: Message ID = 48 Message byte count = 32 + (n x 52) where n is number of observations
FRMA/B Framed Raw Navigation Data
Format: Message ID = 54 Message byte count = variable
FRMA
FRMB
$FRMA week seconds prn cstatus # of bits framed raw data
GGAB Global Position System Fix Data (Binary Format Only)
GPALM Almanac Data
1
2 3 Reference Table 20-VI, ICD-GPS-200, Rev. B for scaling factors and units.
GPGGA Global Position System Fix Data
$GPGGA utc lat lat dir lon lon dir GPS qual # sats hdop alt units null null age stn ID *xx [CR][LF]
GPGLL Geographic Position
GPGRS GPS Range Residuals for Each Satellite
GPGSA GPS DOP and Active Satellites
GPGST Pseudorange Measurement Noise Statistics
GPGSV GPS Satellites in View
GPRMB Navigation Information
GPRMC GPS Specific Information
GPVTG Track Made Good And Ground Speed
GPZDA UTC Time and Date
GPZTG UTC & Time to Destination Waypoint
MKPA/B Mark Position
Format: Message ID = 05 Message byte count = 88
MKPA
MKPB
MKTA/B Time of Mark Input
Format: Message ID = 04 Message byte count = 52
MKTA
MKTB
$MKTA week seconds offset offset std utc offset cm status *xx [CR][LF]
NAV A/B Waypoint Navigation Data
NAVA
NAVB
Format: Message ID = 08 Message byte count = 76
Page
PAVA/B Position Averaging Status
PAVA
PAVB
Format: Message ID = 50 Message byte count = 80
POSA/B Com puted Position
POSA
POSB
PRTKA/B Computed Position
(RTK)
PRTKA
Example: $PRTKA,872,174963.00,1.000,8,7,7,51.11358042429,
-114.04358006710,1059.4105, -16.2617,61,0.0096,0.0100,0.0112,0,0,4,42,119*51[CR][LF]
PRTKB
Format: Message ID = 63 Message byte count = 124
PVAA/B XYZ Position, Velocity and Acceleration
PVAA
PVAB
Format: Message ID = 49 Message byte count = 108
PXYA/B Computed Cartesian Coordinate Position
PXYA
PXYB
Format: Message ID = 26 Message byte count = 88
Page
RALA/B Raw Almanac
RALA
RALB
RASA/B Raw Almanac Set
RASA
$RASA RxWeek RxSec AlmWeek Toa RxPrn # subframes subframe# page # subframe
subframe# page # subframe
RASB
Format: Message ID = 66 Message byte count = 40 + (n * 32)
RBTA/B Satellite Broadcast Data: Raw Bits
RBTA
RBTB
Page
RCSA/B Receiver Status
RCSA
RCSB
REPA/B Raw Ephemeris
REPA
REPB
RGEA/B/D Channel Range Measurements
RGEA
Example (carriage returns have been added between observations for clarity):
$RGEA week seconds # obs rec status prn psr psr std adr adr std dopp C/No locktime ch-tr-status
prn psr psr std adr adr std dopp C/No locktime ch-tr-status
RGEB
Format: Message ID = 32 Message byte count = 32 + (obs x 44)
Format: Message ID = 65 Message byte count =24 + (20 x number of obs)
RGED
196 MiLLennium GP SCard Software Version 4.50 Command Descriptions Manual Rev 1
Table D-5 Receiver Self-Test Status Codes
N7 N 6 N 5 N 4 N 3 N 2 N 1 N 0 <- <- Nibble
Number
Page
Page
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Table D-6 Range Record Format (RGED only)
Page
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Table D-7 Channel Tracking Status
Table D-7, Bits 12-14: Correlator Spaci ng
Higher numbers are reserved for future use
Higher numbers are reserved for future use
RINEX
RPSA/B Reference Station Position and Health
Format: Message ID = 60 Message byte count = 56
RPSA
RPSB
$RPSA week seconds X Y Z health stn ID *xx [CR][LF]
RTCA Standard Logs
RTCM Standard Logs
RTKA/B Computed Position - Time Matched
RTKA
RTKB
Format: Message ID = 61 Message byte count = 116
RTKOA/B RTK Solution Parameters
RTKOA
sat id amb res
RTKOB
Format: Message ID = 62 Message byte count = 196 + (#res)*16
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Table D-8 Ambiguity Types
Table D-10 RTK Status
Table D-9 Searcher Status
RVSA/B Receiver Status
RVSA
RVSB
Format: Message ID = 56 Message byte count = 28 + (8 x number of cards)
SATA/B Satellite Specific Data
SATA
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 213
SATB
Table D-11 GPSCard Range Reject Codes
Format: Message ID =12 Message byte count = 32 + (obs*32)
SBTA/B SATELLITE BROADCAST DATA: RAW SYMBOLS
Format: Message ID = 53 Message byte count = 168
SBTA
SBTB
$SBTA week seconds prn cstatus message # # of symbols raw symbols *xx [CR][LF]
SPHA/B Speed and Direction Over Ground
SPHA
SPHB
SVDA/B SV Position in ECEF XYZ Coordinates with Corrections
SVDA
SVDB
Format: Message ID = 36 Message byte count = 36 +(obs*68)
TM1A/B Time of 1PPS
TM1A
TM1B
VERA/B Receiver Hardware and Software Version Numbers
VERA
VERB
VLHA/B Velocity, Latency, and Direction over Ground
VLHA
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 221
VLHB
Table D-12 GPSCard Velocity Status
Format: Message ID = 34 Message byte count = 72
WALA/B WAAS Almanac
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 223
WALB
Table D-14 Data ID Type
Format: Message ID = 81 Message byte count = 92
Table D-13 Health and Status Bits
Data ID Type (Service Provider)
WRCA/B Wide Band Range Correction (Grouped Format)
WRCA
WRCB
ECOMPARISON OF RT-2 AND RT-20
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 225
E COMPARISON OF RT-2 AND RT-20
E.1 RT-2 & RT-20 PERFORMANCE
Table E-1 Comparison of RT-2 and RT-20
RT-2 Performance
Table E-5 RT-2 Degradation With Respect To Data Delay
Table E-3 RT-2 Performance: Static Mode
Table E-4 RT-2 Performance: Kinematic Mode
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 227
Figure E-1 Typical RT-2 Horizontal Conver gence - Static Mode
Figure E-2 Typical RT-2 Horizontal Convergence - Kinematic Mode
RT-20 Performance
Single-point solution Floating ambiguity solution Narrow lane solution
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 229
Table E-6 RT-20 Performance
Figure E-5 Typical RT-20 Convergence - Static Mode
Page
E.2 PERFORMANCE CONSIDERATIONS
Performance Degradation
REMOTE TRACKING LOSS
DIFFERENTIAL LINK BREAKDOWN
E Comparison Of R T-2 And RT-20
232 MiLLennium GP SCard Software Version 4.50 Command Descriptions Manual Rev 1
Figure E-8 RT-20 Re-initialization Process
F Standards and R eferences
FSTANDARDS AND REFERENCES
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 233
G Geodetic Datums
GGEODETIC DATUMS
234 MiLLennium GP SCard Software Version 4.50 Command Descriptions Manual Rev 1
Table G-1 Reference Ellipsoid Constants
Table G-2 Transformation Parameters (Local Geodetic to WGS84)
G Geodetic Datums
Table G-2 Transformation Parameters (Local Geodetic to WGS84)
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 235
H Some Common U nit Conversions
HSOME COMMON UNIT CONVERSIONS
236 MiLLennium GP SCard Software Version 4.50 Command Descriptions Manual Rev 1
H SOME COMMON UNIT CONVERSIONS
H.3 TEMPERATURE H.4 WEIGHT
H.5 HEXADECIMAL AND BINARY EQUIVALENTS
H.6 GPS TIME OF WEEK TO CALENDAR DAY (EXAMPLE)
H.6.1 Calendar Date to GPS Time (e.g. 11:30 hours, January 22, 1995)
I Information Messages
INFORMATION MESSAGES
I
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INFORMATION MESSAGES
Table
TYPE 2 INFORMATION MESSAGES
I Information Messages
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I Information Message s
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J
JLISTING OF TABLES
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LISTING OF TABLES
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 243
Table 1-1 GPSCard Pseudorange Differential Initialization Summary
Table 2-1 Commands By Function Table
Table 1-2 Latency-Induced Extrapolation Error
Reference Station Remote Station
POSITION, PARAMETERS, AND SOLUTION FILTERING CONTROL
Page
246 MiLLennium GP SCard Software Version 4.50 Command Descriptions Manual Rev 1
Table 2-2 GPSCard Command Summary
Command Description Syntax
Page
248 MiLLennium GP SCard Software Version 4.50 Command Descriptions Manual Rev 1
Table 3-1 Logs By Function Table
POSITION, PARAMETERS, AND SOLUTION FILTERING CONTROL
SATELLITE TRACKING AND CHANNEL CONTROL
WAYPOINT NAVIGATION
DIFFERENTIAL REFERENCE STATION
DIFFERENTIAL REMOTE STATION
POST PROCESSING DATA
250 MiLLennium GP SCard Software Version 4.50 Command Descriptions Manual Rev 1
Table 3-2 GPSCard Log Summary
CLOCK INFORMATION, STATUS, AND TIME
NAVIGATION DATA
Syntax: log port,datatype,[trigger],[period],[offset],{hold}
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 251
Table 4-1 Positioning Modes
Remote station:
Table C-3 VARF Range (Software Version 4.42 or higher)
Table C-1 Antenna LNA Power Configuration
252 MiLLennium GP SCard Software Version 4.50 Command Descriptions Manual Rev 1
Table D-1 GPSCard Solution Status
Table D-3 RTK Status for Position Type 3 (RT-20)
Table D-2 Position Type
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Table D-4 RTK Status for Position Type 4 (RT-2)
Table D-5 Receiver Self-Test Status Codes
Higher numbers are reserved for future use
N7 N 6 N 5 N 4 N 3 N 2 N 1 N 0 <- <- Nibble
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Table D-6 Range Record Format (RGED only)
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5
Table D-7 Channel Tracking Status
Page
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 257
Table D-8 Ambiguity Types
Table D-10 RTK Status
Table D-9 Searcher Status
Ambiguity Type Definition
258 MiLLennium GP SCard Software Version 4.50 Command Descriptions Manual Rev 1
Table D-11 GPSCard Range Reject Codes
.
Table D-12 GPSCard Velocity Status
Table E-1 Comparison of RT-2 and RT-20
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1 259
Table E-3 RT-2 Performance: Static Mode
Table E-6 RT-20 Performance
Table E-5 RT-2 Degradation With Respect To Data Delay
Table E-4 RT-2 Performance: Kinematic Mode
KGPS GLOSSARY OF TERMS
Page
Page
Page
Page
Page
Page
Page
L GPS Glossary of Acronyms
LGPS GLOSSARY OF ACRONYMS
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L GPS GLOSSARY OF ACRONYMS
L GPS Glossary of Acronyms
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MINDEX
Numerics
A
B
C
D
E
F
G
H
I
K
L
M
N
O
R
S
T
U
V
W
