High Resolution 1:10,000 scale Mapping Strategy of Multi ... - NDMA

DGPS uses a network of fixed, ground-based reference stations to broadcast the
difference between the positions indicated by the satellite systems and the known
fixed positions.
FEATURES:
• Accuracy in Millimeter range: Input voltage 12 –24 VDC.
• TCP / IP based on-line communication for Centralized data acquisition and
processing.
• GPS software and WINDOWS XP Server for data processing.
SPECIFICATIONS:
APPENDIX- XXII
SPECIFICATIONS OF DIFFERENTIAL GPS
(A) GPS Receiver:
1. Dual frequency GPS receiver with GLONASS tracking facility
2. Internal memory or removal card memory of minimum 256 MB – 1 GB
capable of storing minimum 180 days of data at 30 second sampling interval.
3. User selectable sampling rate in the range of 5 Hz to 1 min.
4. Recording of data at two sampling intervals simultaneously, so that the higher
frequency data can also be retained within the receiver.
5. The GPS receiver should be able to accommodate met-package so that met
data are automatically stored in binary file produces separate met file.
6. Should have total minimum 70 channels (GPS+ GLONASS) and should be
capable of tracking: GPS: L1-C / A, L2C – C/A & P.
7. Receiver should also be capable of up gradation to track GPS L5 and Galileo
in future.
8. Receiver should be equipped with display and control unit / panel.
9. Power Consumption not exceeding 5 Watt (receiver, Antenna, Controller
nominal) with external Battery voltage in the range of 12-16 volts D.C
10. Power Ports: Minimum two external physical redundant power ports with
automatic switching facility within 12 – 16 VDC, physical over-voltage
protection and polarity protection. The power ports should not be connected
internally.
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