RTD - Technical Specifications


Applications:
Static geodetic networks, network RTK, deformation monitoring, aircraft approach and landing, precision agriculture, machine control, vehicle tracking, harbor navigation, robotics, GPS/INS integration, intelligent transportation, sports, fleet and product tracking, dwelling landslide alarm systems, and location based content services.

Operational Modes:
Real-Time:  Serial connection, dial-up modem, cellular phone, frame relay, radio modem, TCP/IP, wireless Internet.

Dial-Up/Polling:  One or more modem(s) or TCP/IP connections for fast simultaneous data download.

Post-Process: RINEX from single frequency and dual-frequency geodetic receivers. Various raw data formats. Precise ephemerides (SP3 format).

RTK:  Standard Client - Supports conventional network RTK using RTCM V2.2, CMR, CMR+.  Allows for small deformation of base network.
Smart Client - Supports initialization-free (instantaneous), wide-area network RTK from multiple base stations, including ionosphere correction.  Troposphere is estimated Epoch-by-Epoch™.  Precise ephemeris obtainable by ftp in real-time and dial-up modems.

Network Setup:
User Interface: Intuitive, guides the user through the setup process. Includes full on-line help.

Backup: Multiple networks can be defined and saved.

Site Info: Comprehensive, names, coordinates as Cartesian or geodetic, position constraints, GPS receiver and antenna type.

Sensors: Thales Navigation (Ashtech) Z series. Leica CRS1000, RS500, MC500, 1200, SR530, Novatel OEM4,  Trimble 4000 SSE, 4700/5800, TOPCON Odyssey, various single-frequency receivers, other receivers available upon request.

Data:
Site Logging: No PC required at the GPS sensor location.

Transfer: Continuous in Real-Time operational mode. Dial-Up/Polling at user defined intervals as frequently as five minutes.

Archive: Both raw and RINEX data formats. Stored in chronological directory structure. GNS file (binary log of single-epoch network solutions)

*Accuracy and station spacing are dependent upon GPS satellite system performance, ionospheric conditions and other factors.



Replication: Automatic network or FTP transfer of data for archival and network or Internet FTP and Web access.

Utilities: RINEX file manipulation, site coordinate transformation tool, baud-rate tool.

Data Base: Site coordinates database.

Analysis:
Algorithm: Proprietary Real-Time Network Analysis (RNA) module with the Epoch-by-Epoch™ positioning algorithms.

Solution: Independent position computation at each epoch in baseline or network mode.

Precision: Single-epoch precision* +- [10 mm + 0.2 mm/km)] horizontal. 2 times less precise in vertical (1 standard deviation).

Range: Station spacing (nearest neighbor): up to 50 km* with dual-frequency receivers unconstrained, up to 250 km with constrained coordinates (for static networks), up to 5 km with single-frequency receivers.

Troposphere: Zenith path-delay determined at each site for monitoring atmospheric water vapor content and short-term weather forecasting.

Network Analysis Output:
Archive: GNS solution files for replay including Epoch-by-Epoch™ solutions. SINEX solution files for network adjustment.

Visual Display: Plots of Epoch-by-Epoch™ solutions for position, velocity and acceleration. Map of site locations.

Logs: Status and solution statistics.

Alarms: User-specified alarm tolerances (automatic notification of operators).

RTK and DGPS Real-Time Transmission:
Formats: Leica Binary, RTCM V2.1, V2.2, CMR, CMR+.

Local: Available by connecting a radio and/or cellular phone to each GPS sensor.

PC Requirements (Each PC supports up to 30 GPS sites):
Processor: At least Pentium 450MHz with 128 MB RAM

OS: Windows 98, Windows NT 4.0 (or later), Windows 2000, Windows XP.

Hard Drive: 500Mbyte spare capacity recommended.

Peripherals: CD-ROM drive, available serial and parallel ports, 800x600 pixel video card





 

 
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