1. HAII-ICGC :GNSS Project 2015/03/05

2. 2 To establish 1 IGS-nominated GNSS reference station with time control at NIMT with data center to synchronize data with IGS and the International Bureau of Weights and Measures (BIPM) To establish 5 GNSS reference stations in the flood risk area. To setup a data center at HAII to synchronize all existing and new GNSS reference stations in order to formulate national CORS network and provide services to support precise mapping applications Objectives

3. Site selection Current +Plan Station in Thailand central part of Thailand 1.Located in central part of Thailand (flood area) 2.Baseline distance between station within 50-100 km 3.Can be connected to current RTK networks (DPT&DOL) 6 stations

4. VRS system by Department of land (DOL) RTN system by Department of Public Works and Town & Country Planning (DPT) 6 Stations (on HAII-NIMT plan) 1 IGS-Station +5 Stations Reference Network in Thailand

5. 99 km 107 km 64 km 76 km 60 km 52 km 54 km 67 km 50 km 55 km Baseline distance for 6 station networks

6. Instrumentation: for 6 stations Main InstrumentOther DeviceOption A- Station (At NIMT*) 1 station (IGS) 1 station (Back up) 1 server 2 Meteorology Devices1 atomic clock B-F station5 stations5 Meteorology Devices Data Center1 server + Software (processing / network& user service) - Weather Module -Monitoring Module * National Institute of Metrology of Thailand (www.nimt.or.th)

7. Instrumentation: for 6 stations AntennaReceiver Model Software TrimbleTrimble GNSS (Choke Ring Antenna) NetR9 Trimble(developer) LeicaLeica AR25 (Choke Ring Antenna) Leica GR25Leica GNSS Spider(developer) JAVADRingAnt-DM (Choke Ring Antenna) DELTA-3Geo++ NovatelGNSS-750 (Choke Ring Antenna) ProPak6™Geo++ -GNREF (Base station software for IGS) -Grafnav Post-processing software TOPCONPN-A5Net-G5Topnet(developer) - 6 stations will be installed the same instruments - Now we have 5 instrument sets from 5 agencies proposed. Report concluded by Ms.Peraya Tantianuparp (peraya@haii.or.th)