1.9. What is WAAS?
WAAS (Wide Area Augmentation System) is a network of 25 reference station (WRS, Wide Area Ground Reference Station) that receive GPS signals. They have been surveyed exactly in terms of their position. Each reference station determines actual and target pseudo-range deviation.
The precisely processed DGPS correction values are transmitted to two geo-stationary satellites (Inmarsat) and beamed back to earth on the GPS L1 frequency. The WAAS signals are received by GPS receivers equipped for this task and further processed.
Currently, WAAS satellite coverage is only available in North America. There are no ground reference stations in South America, so even though GPS users there can receive WAAS, the signal has not been corrected and thus would not improve the accuracy of their unit.
Sub Navigation
- 1.1. How many GPS satellites are in orbits around Earth?
- 1.2. How is GPS used?
- 1.3. Will GPS receivers work anywhere on Earth?
- 1.4. What is NMEA 0183?
- 1.5. What is "Acquisition Time" ?
- 1.6. How much time is required to receive all data in the GPS navigation message?
- 1.7. What are some of the ways of increasing GPS position accuracy?
- 1.8. What is DGPS?
- 1.9. What is WAAS?
- 1.10. What is EGNOS
- 1.11. What is AGPS?
- 1.12. Is map included in GlobalTop GPS module?
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Gtop 1.9. What is WAAS? Introduction
GlobalTop Technology Inc. is Taiwan supplier and manufacturer in Northern America, South America, Western Asia, Southern Europe, Western Europe, Northern Europe, Eastern Asia, Southern Asia, Central Asia, Australia, New Zealand and Russia. Gtop has been offering our customers high quality GPS Module since 2006. With both advanced technology and 6 years experience, Gtop always make sure to meet each customer's demand.
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GlobalTop Technology Inc.
No. 16, Nan-Ke 9th Road, Science-Based Industrial Park, Tainan 741, Taiwan
TEL: +886-6-5051268
FAX: +886-6-5053381
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