VNet 6 Dual-Frequency GNSS CORS System

VNet 6 Dual-Frequency GNSS CORS System

System FeaturesTechnical parametersApplicationsMore Information

The VNet 6 is built on HI-TARGET's sophisticated GPS/GNSS technology. Combined with HI-TARGET’s many years of experience and knowledge in establishing CORS/VRS system and monitoring system, HI-TARGET has the proprietary software to be used, such as HI-TARGET ZNetCaster and HI-TARGET ZNetVRS for CORS/VRS, HI-TARGET VNetStream and HI-TARGET GPSMonitor for monitoring. All these software are perfectly working for these applications. The VNet 6 is able to achieve extra high accuracy in real time by utilizing single-epoch algorithm.
      
The VNet 6 also provides an open platform to be fully compatible with the third party software on the current market.
 
Adopting advanced Pacific Crest Maxwell 6 custom survey GNSS technology, The VNet 6 GNSS Continuously Operating Reference Station(CORS) system with 220 channels for multi-constellation tracking provides high accuracy, productivity and efficiency. It is capable of tracking signals from GPS, GLONASS, Galileo, Compass(BeiDou) constellations.
 
The VNet 6 is embedded with Linux operation system to support multi-user, multi-task and multi-platform operation with complete system connectivity. Five RS232 ports, Ethernet port, GSM antenna port, high accurate atomic clock port, and four power inputs combined with an industry leading 20Hz data rate, the VNet 6 provides high speed connections both in and out of the reference station.
 
The VNet 6 provides data for postprocessing and it provides an accurate reference station service that can be used in the filed by multiple one-person crews. The reference station network can be built up with several reference stations to increase the area of coverage. With the capability of collecting and saving RINEX and BINEX data, the VNet 6 is fully compatible with the existing CORS networks in the world market, perfect for establishing new CORS systems or expanding current CORS networks.
 
The VNet 6 has exceptionally low power consumption, simultaneously supports multiple-way AC/DC power supply such as solar or wind-solar hybrid power supply. Also, the VNet 6 has backup power supply to ensure no data is missed. The VNet 6 has internal compact flash card with up to 1GB of data storage and available for maximum 32GB data storage extension by SD card. It supports long-time massive data storage, and the data is well backed up during output.
 
Using Internet Protocol, the VNet 6 with powerful remote management functionality provides full receiver status, data access, configuration, firmware updates, as well as a variety of security levels and access controls.

MEASUREMENTS
• 220 Channels
• Advanced Pacific Crest Maxwell 6 Custom Survey GNSS Technology
• High precision multiple correlator for GNSS pseudo range measurements
• Unfiltered, unsmoothed pseudo range measurements data for low noise, low multipath error, low time domain correlation and high dynamic response
• Very low noise GNSS carrier phase measurements with <1 mm precision in a 1 Hz bandwidth
• Signal-to-Noise ratios reported in dB-Hz
• Proven Pacific Crest low elevation tracking technology

 

Satellite signals tracked simultaneously

GPS: Simultaneous L1C/A, L2C, L2E, L5
GLONASS: Simultaneous L1C/A, L1P, L2C/A (GLONASS M only), L2P
SBAS: WASS, MASA, EGNOS
Galileo: Simultaneous L1 BOC, E5A, E5B, E5AltBOC1
Compass(BeiDou): Simultaneous B1, B22
 
 
POSITIONING PERFORMANCE3
 
Code Differential GNSS positioning
Horizontal: 25cm+1ppm RMS
Vertical: 50cm+1ppm RMS
SBAS differential positioning accuracy: typically<5m 3DRMS4
 
Static and Fast Static GNSS surveying
Horizontal: 2.5mm+0.5ppm RMS
Vertical: 5mm+0.5ppm RMS
 
Single-epoch dynamic resolution5
Horizontal: 2.5mm+1ppm RMS
Vertical: 5mm+1ppm RMS  
 
Single Baseline<30km
Horizontal: 8mm+1ppm RMS
Vertical: 15mm+1ppm RMS
 
Networked RTK
Horizontal: 8mm+0.5ppm RMS
Vertical: 15mm+0.5ppm RMS
Initialization Time: Less than 30s Initialization Reliability: Over 99.9%
 
HARDWARE
 
Physical
Dimensions (L x W x H): 22.50cm x 13.80cmx 7.00cm(8.86 in x 5.43 in x 2.76 in)
Operating temperature: -40to +65 (-40 to +149)
Storage temperature: -40 to +80 (-40 to +176)
Weight: 1.0kg
Humidity: 100%, considering
Water/dustproof: IP67 dustproof, protected from temporary immersion to depth of 1m (3.28ft).
 
Electrical
Power 7-32V DC input
Power consumption 4 W
250 hours continuous work by 93Ah accumulator
 

I/O interface

 5 x RS232 port, support meteorology equipment, clinometers and other sensor devices

 1 x Ethernet port

 1 x External clock port, support high precision atomic clock connection

 4 x power input ports

1 x GSM antenna port

 

User interface

5 x Instructions LED

2 x Button

Web User Interface

 

Security

Optional HTTP login

Real-time stream authentication, SSL authentication

 Multi-Level Access Control, allow 10 users access at the same time

 

 
COMMUNICATION AND DATA STORAGE
 
Data memory
Onboard memory: 1GB
External SD card: standard 4GB (max. 32GB)
Logging Rate: 1Hz2Hz5Hz10Hz20Hz (1Hz default)
Maximum Logging Rate: 50Hz (update required)
File Format: ZHD.RINEX.BINEX
File naming options: multiple
Data retrieval and transfer: Network Download
Data Management: Cycle storage
 
Communication
Ethernet: RJ45 jack, support HTTP, NTRIP, 10TCP/IP data stream at the same time   1GSM antenna port, for GPRS wireless communication    
Wireless: GPRS/CDMA          
 
Data formats
Correction Formats: CMR, CMR+,sCMRx,RTCM 2.1, RTCM 2.2, RTCM 2.3, RTCM 3.0, RTCM 3.1

Observables: ZHD, RINEX, BINEX

Position /Status I/O: NMEA-0183 V2.30

Survey
Construction
Mapping and GIS
Monitoring
Marine survey
Marine construction
Asset Management
Precision agriculture