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DG16
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ashtech DG16 - Chapter 9. Differential Commands
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Differential Commands
287
This chapter contains the receiver co
mmands for the following applications:
•
RTCM Commands
, on page 288
•
SBAS Commands
, on page 304
•
Beacon Commands
, on page 314
306
308
Table of Contents
Main Page
Default Chapter
3
Table of Contents
3
Chapter 1. General Information
21
Board Hardware
25
Sensor Hardware
26
Sensor LED
27
Power Requirements and Connections
28
Power Connections
29
Backup Power
31
Interfaces to External Equipment
32
DG16 Sensor Interfaces
33
RF Connections
34
Receiver Options
35
Firmware Upgrades
38
Hardware Description
41
Power
42
Chapter 2 . Getting Started
43
Sensor
43
Communication Port Setup
45
Chapter 3. Basic Operation
49
DG16 Message Output
50
Session Programming
52
Daisy-Chain Mode
53
Saving Parameter Settings
55
Position Modes (Least Squares Algorithm)
56
Position Modes (Kalman Filter Algorithm)
57
Navigation Solutions
59
Fixed Altitude Modes
60
Point Positioning
61
Ionospheric Model
62
Time Tagging the Shutter Signal
66
Jam Immunity
69
Chapter 4. Differential Operation
73
Sources of Error
74
RTCM 104 Format, Version 3.0
75
Base Station
76
Setting up a Differential Base Station
77
Moving Base Operation
79
Message Rate
80
Reference Station Health
81
Remote Station
82
Recommended Settings for Differential Remote Stations
84
SBAS Operation
85
Dual Automatic Mode
86
Dual Manual Mode
87
Using SBAS Data
88
Utilizing Integrity Information
89
Beacon Operation
90
Dual Automatic Mode
91
Single Manual Mode
92
Adding Stations to the Beacon Directory
93
Deleting Stations from the Beacon Directory
94
Saving and Resetting the Beacon Directory
95
Saving and Resetting Beacon Parameters
96
Output Beacon Data to Serial Ports
97
Automatic Primary-Secondary
98
Chapter 5. Coordinate Transformation
99
Datum to Datum
100
Projection Types
104
Elevation Modeling
106
Chapter 6. Receiver Commands
107
Receiver Commands
109
Message Formats
110
AJM: In-Band Jam Immunity
116
ANT: Set Antenna Offsets
117
BIT: Operational Diagnostic Tests
119
CRR: Code Correlator Mode
120
CTS: Handshaking Protocol
122
DAP: Doppler Averaging Interval
123
DFO: Remote Station Status
124
DSY: Daisy Chain Communications Mode
125
DTM: Set Reference Datum
126
DUG: GPS/UTC Time Difference
129
DYN: Dynamic Mode
130
EPG: Kinematic Epoch Counter
131
ERM: Set Position Error Mask Values
132
FIX: Fixed Altitude Mode
134
FZN: Select Fixed UTM Zone
135
GRD: Datum to Grid Transformation (Map Projection)
137
HDP: HDOP Mask Value
138
HLP: Help
140
HST: Start-Up Diagnostic Results
142
INI: Initialize the Receiver
144
ION: Ionospheric and Tropospheric Modelling
145
KFP: Kalman Filter
147
KFP,FDE: Kalman Filter Fault Detection and Elimination
148
KPI: Known Point Initialization
149
LGS: Grid to Grid Transformation
150
LTZ: Local Time Zone
152
OOP: Output Messages Order
153
PDP: PDOP Mask Value
157
PMD: Position Mode
158
POS: 3-D Antenna Position
160
POW: Battery Parameters
162
PPO: Point Positioning
163
PPS: Pulse Per Second
164
Timing Pulse and Measurement Strobe (Optional)
165
PWR: Receiver Power
166
Integrated Differential Optimization
168
RIO: Receiver Identification Parameters (Format 2)
169
RST: Restore Default Parameters
171
SCM: Smoothing Counter Mask
172
SEM: Secondary Elevation Mask
173
SES,PAR: Session Programming Parameters
174
SES,SET: Individual Session Programing
175
SMI: Code Measurement Smoothing
177
SNM: Signal-To-Noise Mask
178
Satellite Tracking
179
SVP: Include/Exclude Satellites for Position Computations
181
SVS: Include/Exclude Satellites for Acquisition and Tracking
182
UCT,UDD,APT: Add Point for 3-D Datum Transformation
184
UCT,UDD,CAL: Calculate Datum Transformation Parameters
185
UCT,UDD,EST: Estimating a 3-D Datum Transformation
186
UCT,UDH,CAL: Calculate Local Geoidal Surface
187
UCT,UG4,APT: Add Point for Grid Transformation
188
UCT,UG4,EST: Estimating a Grid Transformation
189
UDD: User-Defined Datum
190
UDG: User-Defined Datum to Grid Transformation
193
UDH: Geoidal Surface in a Local Area
198
USP: Satellites Used in Position Computation
199
VDP: VDOP Mask
200
Chapter 7. Raw Data Commands
203
Message Structure
206
CMB: Channel Measure Block
207
CT1: Combined Measurement/Position Data (Format 1)
208
CT2: Combined Measurement/Position Data (Format 2)
210
CT3: Combined Measurement/Position Data (Format 3)
212
ELM: Elevation Mask for Raw Measurements Outputs
214
MBN: Raw Measurements (Ashtech Type 2 Data Structure)
215
MCA: Raw Measurements (Ashtech Type 3 Data Structure)
217
MCM: Missile Application Condensed Measurement Record (MACM)
220
MIS: Miscellaneous Data Structure
223
MSB: Encapsulated Data Message
227
MSV: Minimum Satellites for Raw Measurement Output
230
PBN: Raw Position Data
231
RAW: RAW Data Query Command
232
RCI: Set Output Interval for Raw Messages
233
SAL: Satellite Almanac Data
234
SAW: SBAS Almanac
236
SIT: Site Name for Observation Session
237
SNV: Satellite Ephemeris Data
238
SNW: SBAS Ephemeris Data
240
XYZ: 3D Satellite Positions
241
Chapter 8. NMEA Commands
243
Message Structure
246
NME: Enable/Disable All NMEA Messages
247
ALM: Almanac Message
248
CRT: Cartesian Coordinates Message
249
GGA: 3-D GPS Position
253
GLL: 2-D Position
256
GNS: GNSS Fix Data
258
GRS: Satellite Range Residuals
259
GSA: DOP and Active Satellites
261
GSN: Satellite PRN Number and Signal Strength
263
GST: Pseudo-Range Error Statistics
265
GSV: Satellites in View
267
GXP: Horizontal Position Message
270
LTN: Position Output Latency
271
MSG: Differential Base Station Data
273
PER: Global Output Interval
284
POS: Position Message
285
PTT: Pulse Time Tag
287
RMC: Recommended Minimum Course
288
RRE: Satellite Range Residuals and Position Error
290
SAT: Comprehensive Satellite Tracking Data
292
TCM: Differential Remote Station Status
295
TTT: Photogrammetry Event Marker
297
UKO: UKOOA Message
298
UTM: Universal Transverse Mercator (UTM) Coordinates
299
VTG: Course and Speed over the Ground
302
XMG: Exception Messages
304
ZDA: Time and Date
305
Chapter 9. Differential Commands
307
RTCM Commands
308
Automatic Differential Mode
309
BAS: Set Receiver in Differential Base Station Mode
310
MAX: Maximum Age Threshold for Differential Corrections
311
OFF: Disable Differential Operation
312
REM: Set Receiver in Differential Remote Station Mode
313
Parameter Settings and Status
314
RTL: User Entered Position Information
317
SEQ: Verify RTCM Message Sequence
318
SPD: Baud Rate for RTCM Message Output
319
STH: Differential Base Station Health
320
TAG: RTCM SC-104 Version
321
UDR: UDRE Acceptance Threshold
323
SBAS Commands
324
SBA: Query SBAS Parameters
325
CDU: Channel Data Utilization
326
DAM: Dual Automatic Mode
327
INF: SBAS Information Message
328
INT: Integrity Information
329
MAN: Single Manual SBAS Mode
330
RTC: SBAS to RTCM Interface
331
SAM: Single Automatic Mode
332
USE: SBAS Satellites for Acquisition
333
Beacon Commands
334
ADD: Add Frequency
336
ALM: Internal Almanac Message
337
CLR: Clear Never-Use Mark
338
DIR,CLR: Erase Beacon Directory
339
DIR,DEL: Delete Beacon Station from Beacon Directory
340
MOD,AUT,SNG: Set Single Automatic Mode
341
OUT: Serial Port for Output
342
SAV: Save Beacon Parameters
343
Components of UDM Utility
346
Creating a New Project
347
Message Parameters Pane
348
Warning Window
350
Editing Message
351
Repair Centers
360
Appendix B. Floating Point Data Representation
353
Sign Bit Field
353
The Represented Value
354
Double-Precision Float
355
Appendix C. Global Product Support
360
Index
362
Operation
380
Magnetic Variation Model
383
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