Engineering Surveying LSGI2961_20202_A

Engineering Surveying
(LSGI2961)

Lecturer: Dr Lawrence Lau




1

, Outline


❑ GNSS/GPS
❑ Kinematic GNSS

, Global Navigation Satellite System (GNSS)


• GNSS
– Global Positioning System (GPS) - US
– GLObal NAvigation Satellite System (GLONASS) - Russia
– Galilao - EU
– BeiDou Navigation Satellite System (BDS) – China
– Regionl Navigtion Satellite System (RNSS)
• Japan's Quasi-Zenith Satellite System (QZSS)
• Indian Regional Navigation Satellite System (IRNSS), aka Navigation
with Indian Constellation (NAVIC)
– Satellite Based Augmentation System (SBAS)
• WAAS (US), EGNOS (EU), MSAS (Japan) and GAGAN (India)

3

, Global Positioning System Concept




Source

• User measures distance to four satellites
• Satellites transmit their positions in orbit
• User solves for position (X,Y,Z or  , h) and clock error t
4