Product Manual
Table Of Contents
- How To Use this Documentation
- Table of Contents
- Chapter 1. Introduction
- Chapter 2. RTK Surveying Preliminary Steps
- Chapter 3. Post-Processed Surveying
- Chapter 4. Precise Surveying - Field Applications & Concepts
- Chapter 5. RTK Implementation
- Chapter 6. Troubleshooting
- List of Alarms
- Receiver is Not Tracking Satellites
- Receiver is Not Logging Data
- Radio Data Link Fails to Provide Base Corrections to Rover
- Data Link Okay but No Fixed Position Computed
- Rover is Computing Positions with High Uncertainties
- Logging Data for RTK Troubleshooting Purposes - Reporting a Problem to Ashtech Tech Support
- Chapter 7. Miscellaneous
- ATOM File Naming Conventions
- Reverting to V1 for All ATOM Messages Generated by the Receiver
- Time-tagged RTK vs. FAST RTK Position Output
- Special Button Combinations Summary
- Reset Procedure
- Using a USB key to Save/Upload Receiver Configurations or Copy User Data
- Asking a Rover to Use the Same Local Coordinate System as the Base
- Firmware Upgrade Procedure
- Enabling a Firmware Option
- Configuring Serial Port A
- Installing a SIM Card
- Changing the Radio Module or Using One for the First Time
- Direct IP Connection To Your Own Base Through GPRS Modem and RTDS Software
- Using a Background Map In FAST Survey
- Default Settings
- ProMark 800 Serial Commands & Data Outputs Supplement
- Appendix A. Using Serial Commands
- Appendix B. Set Command Library
- AGB: Enabling/Disabling GLONASS Bias Adjustments
- ANH: Antenna Height
- ANP,PCO & ANP,EDx: Creating/Editing Antenna Definitions
- ANP,DEL: Delete User-Defined Antenna
- ANP,OUT: Defining a Virtual Antenna
- ANP,REF: Naming the Antenna Used at the Base
- ANR: Antenna Reduction Mode
- ANT: Antenna Height
- ATL: Debug Data Recording
- ATM: Enabling/Disabling ATOM Messages
- ATM,ALL: Disabling All ATOM Messages
- ATM,PER: Setting Unique Output Rate for all ATOM Messages
- ATM,VER: Setting the Version of ATOM Messages
- BAS: Differential Data Type
- BEEP: Beeper Setup
- BRD: Enabling/Disabling the RTC Bridge Function
- BTH,NAME: Bluetooth Device Name
- BTH,PIN: Bluetooth Device Pin Code
- CFG: GNSS Tracking Configuration
- CMD,LOD: Running a List of $PASH Commands
- CMD,WTI: Inserting Wait Times
- CMR,TYP: CMR Message Type and Rate
- CPD,AFP: Setting the Confidence Level of Ambiguity Fixing
- CPD,FST: RTK Output Mode
- CPD,MOD: Base/Rover/Backup Mode
- CPD,NET: Network Corrections
- CPD,REM: Differential Data Port
- CPD,RST: RTK Process Reset
- CPD,VRS: VRS Assumption Mode
- CTS: Handshaking
- DBN,TYP: DBEN Message Type & Output Rate
- DIP: Server Connection
- DIP,OFF: Terminating Direct IP Connection
- DIP,ON: Establishing the Programmed Direct IP Connection
- DIP,PAR: Setting Direct IP Parameters
- DRI: Raw Data Recording Rate
- DSY: Daisy Chain
- DYN: Receiver Dynamics
- ELM: Setting the Elevation Mask for Raw Data Output
- FIL,D: Deleting Files
- FIL,DEL: Deleting Files and Directories
- GAL: Galileo Tracking
- GLO: GLONASS Tracking
- GPS: GPS Tracking
- INI: Receiver Initialization
- LCS: Enabling/Disabling Use of Local Coordinate System
- LOG,DEL: Deleting Log Files
- LOG,PAR: Log File Settings
- LTZ: Time Zone
- MDM,INI: Initializing the Modem
- MDM,OFF: Powering Off the Internal Modem
- MDM,ON: Powering On the Internal Modem
- MDM,PAR: Setting the Modem Parameters
- MDP: Setting Port A to RS232 or RS422
- MEM: Selecting Memory Device Used
- MWD: Setting the Modem Timeout
- NME: Enabling/Disabling NMEA Messages
- NME,ALL: Disabling All NMEA and NMEA-Like Messages
- NME,PER: Setting Unique Output Rate for all NMEA Messages
- NPT: Tagging SBAS Differential Positions in NMEA & NMEA-Like Messages
- NTR,LOD: Loading the NTRIP Caster Source Table
- NTR,MTP: Connecting Receiver to NTRIP Caster Mount Point
- NTR,PAR: NTRIP Settings
- OCC: Writing Occupation Data to Raw Data File
- OPTION: Receiver Firmware Options
- PAR,LOD: Configuring the Receiver From a PAR File
- PAR,SAV: Saving the Receiver Configuration To a PAR File
- PEM: Setting the Position Elevation Mask
- POP: Setting Internal Update Rate for Measurements and PVT
- POS: Setting the Antenna Position
- PPS: Setting PPS Pulse Properties
- PRT: Setting Baud Rates
- PWR,OFF: Powering Off the Receiver
- PWR,PAR: Power Management
- RAW: Enabling/Disabling Raw Data Messages in Legacy Ashtech Format
- RAW,ALL: Disabling All Raw Data Messages
- RAW,PER: Setting Unique Output Rate for Raw Data
- RCP,GBx: GLONASS Carrier Phase Biases for User-Defined Receiver
- RCP,DEL: Deleting User-Defined Receiver Name
- RCP,REF: Naming Reference Receiver
- RDP,OFF: Powering Off the Internal Radio
- RDP,ON: Powering On the Internal Radio
- RDP,PAR: Setting the Radio
- RDP,TYP: Defining the Type of Radio and the Receiver Port Used
- REC: Enable/Disable, Start/Stop Raw Data Recording
- RNX,TYP: ATOM RNX Differential Message
- RST: Default Settings
- RTC,MSG: Defining a User Message
- RTC,TYP: RTCM Message Type
- SBA: Enabling/Disabling SBAS Tracking
- SIT: Defining a Site Name
- SNM: Signal-To-Noise Ratio Mask
- SOM: Masking Signal Observations
- SOM,CTT: Cumulative Tracking Time Mask
- SOM,NAV: Navigation Data Mask
- SOM,SNR: Signal-to-Noise Ratio Mask
- SOM,WRN: Channel Warnings Mask
- STI: Defining a Station ID
- SVM: Setting the Maximum Number of Observations in the PVT
- UDP: User-Defined Dynamic Model Parameters
- UNT: Distance Unit Used on Display Screen
- UTS: Synchronizing Onto GPS Time
- WAK: Acknowledging Alarms
- ZDA: Setting Date & Time
- Appendix C. Query Command Library
- AGB: Reading GLONASS Bias Setting
- ALM: Almanac Message
- ANH: Antenna Height
- ANP: Antenna Parameters
- ANP,OUT: Virtual Antenna
- ANP,OWN: Local Antenna Used
- ANP,RCV: Antenna Name and Offsets of Received Base
- ANP,REF: Antenna Used at the Base
- ANR: Antenna Reduction Mode
- ANT: Antenna Height
- ATL: Debug Data Recording
- ATM: ATOM Data Parameters
- ATO: ATOM Message Output Settings
- BAS: Differential Data Type
- BEEP: Beeper State
- BRD: RTC Bridge
- BTH: Bluetooth Settings
- CFG: GNSS Tracking Configuration
- CMR,MSI: CMR Message Status
- CPD,AFP: Ambiguity Fixing Parameter
- CPD,ANT: Base Antenna Height
- CPD,FST: Fast RTK Output Mode
- CPD,MOD: Base/Rover/Backup Mode
- CPD,NET: RTK Network Operation Mode
- CPD,POS: Base Position
- CPD,REM: Differential Data Port
- CPD,VRS: VRS Assumption Mode
- CRT: Cartesian Coordinates of Position
- CTS: Handshaking
- DBN,MSI: DBEN Message Status
- DCR: Cartesian Coordinates of Baseline
- DDS: Differential Decoder Status
- DIP: Direct IP Parameters
- DPO: Delta Position
- DRI: Raw Data Recording Rate
- DSY: Daisy Chain Status
- DTM: Datum Reference
- DYN: Receiver Dynamics
- ELM: Elevation Mask
- FIL,CUR: Information On G-File Being Recorded
- FIL,LST: Listing Files in Receiver Memory or USB Key
- FLS: List of Raw Data Files
- GAL: GALILEO Tracking Status
- GGA: GNSS Position Message
- GLL: Geographic Position - Latitude/Longitude
- GLO: GLONASS Tracking Status
- GNS: GNSS Fix Data
- GPS: GPS Tracking Status
- GRS: GNSS Range Residuals
- GSA: GNSS DOP and Active Satellites
- GST: GNSS Pseudo-Range Error Statistics
- GSV: GNSS Satellites in View
- LCS: Local Coordinate System Status
- LOG: Editing a Log File
- LOG,LST: Listing Log Files
- LOG,PAR: Log File Settings
- MDM: Modem Status and Parameters
- MDM,LVL: Modem Signal Level
- MDM,STS: Modem Status
- MDP: Port A Setting
- MEM: Selected Memory Device
- MWD: Modem Watchdog Timeout
- NMO: NMEA Message Output Settings
- NPT: Tagging of SBAS Differential Positions in NMEA & NMEA- Like Messages
- NTR: NTRIP Settings
- NTR,MTP: Connection to Mount Point
- NTR,TBL: Source Table
- OCC: Ocupation State and Parameters
- OPTION: Installed Receiver Firmware Options
- PAR: Receiver Parameters
- PEM: Position Elevation Mask
- POP: Reading Internal Update Rate
- POS: Computed Position Data
- PPS: PPS Settings
- PRT: Baud Rate Settings
- PTT: PPS Time Tag
- PWR: Power Status
- RAW: Raw Data Logging Settings
- RCP: Receiver Parameters
- RCP,OWN: Receiver Name
- RCP,REF: Reference Receiver Name
- RDP,CHT: Radio Channel Table
- RDP,LVL: Reading the Radio Reception Level
- RDP,PAR: Radio Parameters
- RDP,TYP: Radio Type Used
- REC: Raw Data Recording Status
- RID: Receiver Identification
- RMC: Recommended Minimum Specific GNSS Data
- RNX,MSI: ATOM RNX Differential Message
- RRE: Residual Error
- RTC: RTCM Status
- RTC,MSI: RTCM Message Status
- RWO: Raw Data Output Settings
- SAT: Satellites Status
- SBA: SBAS Tracking Status
- SGA: GALILEO Satellites Status
- SGL: GLONASS Satellites Status
- SGP: GPS & SBAS Satellites Status
- SIT: Site Name
- SNM: Signal-to-Noise Ratio Mask
- SOM: Signal Observations Masking
- SOM,CTT: Cumulative Tracking Time Mask
- SOM,NAV: Navigation Data Mask
- SOM,SNR: Signal-to-Noise Ratio Mask
- SOM,WRN: Channel Warnings Mask
- STI: Station ID
- SVM: Satellite Use Mask
- UDP: User-Defined Dynamic Model
- UNT: Distance Unit Used on Display Screen
- UTS: GPS Time Synchronization Status
- VEC: Vector & Accuracy Data
- VERSION: Firmware Version
- VTG: Course Over Ground and Ground Speed
- WARN: Warning Messages
- ZDA: Time & Date
- Appendix D. Output Message Library
- Index
- Declaration of Conformity
69
Precise Surveying - Field Applications & Concepts
About The Different
Virtual Antennas
Existing Today
There exists different virtual antennas, with different names
and specifications. However behind all these antennas is the
same function assigned to the receiver, which is to correct the
raw data for the point(s) of data collection defined for the
virtual antenna.
One of the most widely used virtual antennas is the
“ADVNULLANTENNA” antenna. Most Ashtech products
implicitly select this antenna when the virtual antenna
function is enabled. However other virtual antennas may be
selected, requiring the use of a few proprietary serial
commands ($PASH).
NOTE: You are right if you think only one virtual antenna
should have been defined worldwide. Unfortunately this is
not the case. Probably several initiatives were started at the
same time for the same purpose, giving rise to several
antenna names and specifications.
Cases of Use As seen above using a “virtual” antenna makes sense when
having to collect raw data. It also makes sense in RTK
surveying because rovers need to know the type of GNSS
antenna the base uses to generate its corrections.
Using a virtual antenna is recommended in the following
cases:
• You are working with surveying equipment and software
from different manufacturers.
• You are producing raw data files that you share with a lot
of other people from other companies
• You are providing base raw data or RTK corrections to a
large number of users who do not necessarily use
surveying equipment from the same manufacturer.
Ellipsoidal Height and Elevation
The vertical coordinate measured by GNSS systems is worth
an explanation. Behind this coordinate in fact lies the
specificity of GNSS systems compared to conventional
surveying systems.
Basically, all positions delivered by GNSS systems consist of
geographic coordinates (latitude, longitude, height)
referenced to an ellipsoid, called reference ellipsoid, which is
a simple and accurate model to describe the shape and
surface of our planet.