Is WAAS ground based?

WAAS consists of multiple ground reference stations positioned across the U.S. that monitor GPS satellite data.

Where are WAAS satellites located?

WAAS uses a network of precisely located ground reference stations that monitor GPS satellite signals. These stations are located throughout the continental U.S., Hawaii, Puerto Rico, Alaska, Canada and Mexico. The stations collect and process GPS information and send the information to WAAS master stations.

How many satellites do I need for WAAS?

6 satellites
The WAAS receiver adds a fault detection & exclusion (FDE) feature requiring a minimum of 6 satellites to detect and exclude a faulted satellite.

Are WAAS satellites geostationary?

Operational since 2003, the WAAS network consists of three geostationary satellites and 49 terrestrial-based stations dispersed across the continental U.S., as well as Alaska, Canada, Hawaii, Puerto Rico and Mexico.

How are satellite and terrestrial communication systems classified?

Microwave communication systems are mainly classified into satellite systems and terrestrial systems. Both of these systems require transmit part and receive part. The transmit system converts baseband signal to microwave signal.

Which is satellite based augmentation system does SBAS use?

The SBAS (Satellite-Based Augmentation Systems) is a civil aviation safety-critical system that supports wide-area or regional augmentation – even continental scale – through the use of geostationary (GEO) satellites which broadcast the augmentation information.

Are there vertical outages in the WAAS system?

Vertical outages may occur daily at these locations due to being close to the edge of WAAS system coverage. Use LNAV or circling minima for flight planning at these locations, whether as a destination or alternate.

When did the FAA broadcast the WAAS test signal?

From March to November 2010, the FAA broadcast a WAAS test signal on a leased transponder on the Inmarsat-4 F3 satellite. The test signal was not usable for navigation, but could be received and was reported with the identification numbers PRN 133 (NMEA #46).