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Using GPS with Real Time Correction

Using GPS with Real Time Correction. Presenter Warren Eade Field Services Manager. System Requirements. GPS system capable of receiving external corrections Built-in External An external correction source Satellite Radio cellular. Correction Sources. Virtual Reference Station (VRS)

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Using GPS with Real Time Correction

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  1. Using GPS with Real Time Correction Presenter Warren Eade Field Services Manager

  2. System Requirements • GPS system capable of receiving external corrections • Built-in • External • An external correction source • Satellite • Radio • cellular

  3. Correction Sources • Virtual Reference Station (VRS) • OmniSTAR • SBAS & WaaS • Single Base • Marine Beacon

  4. Pacific Region • OmniSTAR • Land service • Marine Service • Marine Beacon • Marine Service that can work for Land

  5. OmniStar • A subscription satellite broadcast Service • 3 Service levels (VBS, XP 20-30cm, HP 10cm) • (Not all available in some areas) • 2 Wet Services • Subscription available for • Day • Week • Month • Year

  6. Coverage

  7. Requirements of the GPS • GPS needs to have OmniSTAR Receiver built in • Eg Trimble ProXRT, Ag332, SPS-750, SPS-850 • Also supported in some Ashtech & Topcon • External receivers from OmniStar

  8. How it works • GPS satellites • Multiple OmniSTAR GPS Reference Sites • Send GPS corrections via lease line to • Houston Network Control Center where data corrections are checked and repackaged for uplink to • L- Band Geostationary Satellite • Typical Geostationary L-Band satellite footprint. • Correction data are received and applied real-time

  9. Setup Inside TerraSync

  10. Limitation • GPS Needs OmniSTAR receiver • Subscription service • Due to the course vector base map used by OmniSTAR, Marine wet service is needed in the Island. • May need up to 15 deg horizon plane to see broadcast Satelite

  11. Who Might Use This? • Water and waste water services • Teleco’s • Electricity authorities • Irrigation projects • Stake outs • Emergency relief projects • Prelim site survey’s • Agriculture

  12. Questions? References • www.omnistar.com.au • www.trimble.com warren.eade@geosystems.co.nz

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