There are a total of 12 CORS in Hong Kong. 9 stations are built at hilltop, on top of a 5m high pillar and fenced to avoid disturbance. 3 other reference stations are installed on roof-top. The separation of the reference stations is about 10 to 15 km. This is to provide at least 2 stations within 10km for users in most of the area in Hong Kong.

Equipment of Reference Station

• Stations: HKFN, HKKT, HKLT, HKSL, HKPC, HKST, HKWS & HKSC
  • Receiver: Leica GRX1200+GNSS
  • Antenna: Leica AR25.R4 + LEIT
• Stations: HKNP, HKMW, HKOH & HKSS
  • Receiver: Leica SR530 (To be upgraded in Nov, 2011)
  • Antenna: Leica AT504 + LEIS (To be upgraded in Nov, 2011)
• Meteorological sensor: Paroscientific Met3 / Met3A / Met4A
• Tilt sensor: Applied Geomechanics MD900-T/TH (for station with pillar type monument)
• Monument:
  • Concrete Pillar (for outdoor station)
  • Concrete supporting structure (for roof top station)
  • Metal supporting structure (for roof top station)
• Concrete equipment box (for outdoor station)
• Concrete platform for protecting the station from the bush fire and lost of supporting soil
• Lightning protection system
• Temperature control device: temperature sensor and fans
• Communication device: router, modem
• Communication line: leased line
• Power supply: UPS (uninterruptible power supply) supported
• Insect repellent system
• Security fence
  

You may click on the Reference Stations on the following map to see their site photos and download their station summaries

Hilltop SatRef Stations

There are 9 Hilltop stations and they are HKKT (Kam Tin), HKLT (Lam Tei), HKSL (Siu Lang Shui), HKST (Shatin), HKMW (Mui Wo), HKNP (Ngong Ping), HKSS (Shap Sze Heung), HKWS (Wong Shek) & HKOH (Obelisk Hill).

Photo of HKNP

3D Model of a hilltop reference station

3 Rooftop SatRef Stations

They are HKFN (Fanling), HKSC (Stonecutters Island) & HKPC (Peng Chau)

Photo of HKPC