Differential/ Rtk Gps

DIFFERENTIAL/ RTK GPS 

General :

• DGPS accuracy: <1 m (95% confidence level).
• Position update rate: ≥1/s.
• Data output: ASCII, serial RS232, 9600 baud.
• Data storage: 2 PCMCIA cards of 4 Mb.
• Power supply: 11 to 18 VDC.
• Enclosure, connections: Compliant with Ip65.
• Operating temperature: 0 to 60°C.
• Operating humidity: 0 to 100%

Reference Station :

• GPS receiver channels: ≥8 parallel.
• Tracking characteristics: L1 C/A code and carrier.
• Antenna: External compact dome.
• Antenna cable: ≥12 m, low loss type for the GPS frequencies.
• Display: built in display for set-up, control and supervision.
• Keypad: For set-up and control

Mobile Station :

• GPS receiver channels: ≥8 parallel.
• Tracking characteristics: L1 C/A code and carrier.
• Antenna: External compact dome.
• Antenna cable: ≥12 m, low loss type for the GPS frequencies.
• Display: built in display for set-up, control and supervision.
• Keypad: for set-up and control.

Digital radio link :

• Radio frequency transmitting power: VHF (or UHF band) enough to reliably cover the reservoir completely, e.g. ≥ 5 W for medium sized reservoirs.
• Reference station antenna: Directional Yagi.
• Mobile station antenna: Omni-directional, co-linear.
• Antenna cable: ≥12 m, low loss type for the radio modem frequencies.
• Corrections: RTCM SC104 V2.
• Update rate: ≥1/s.

Tracking :

• CA code on at least 12 independent channels.
• L1 carrier phase and Doppler frequency on L1 desirable.
• Accuracy RMS: Less than 5m at 95% confidence (Controlled conditions).

Update Rates :

• At least 1 Hz (one measurement every second) with configuration settings.
• Every 5 seconds for example.

Recording :

• CA code.
• L1 carrier phase and Doppler frequency on L1 desirable.
• Point Averaging.
• Recording by specified time or distance desirable.