Readback: December 2019

In the August 2019 Readback, your reply to the writer who was referring to the More ILS vs. LPV article (February 2019) errs when you say that GPS is a single receiver system for various satellites and WAAS ground station(s). WAAS data is transmitted to users from geostationary communications satellites. Currently three geo comsats are broadcasting WAAS signals covering North America.Jim TorleyColorado Springs, CO

Key Takeaways:

• The article clarifies that WAAS signals are transmitted from geostationary satellites to GPS receivers, after ground stations send corrections to those satellites.
• It advises against emulating potentially reckless pilot behavior recounted in humorous submissions and explains the difference between Decision Height (DH) and Minimum Descent Altitude (MDA) for authorized vs. general operators on certain GPS approaches.
• The discussion on Canadian ADS-B outlines the current uncertainty regarding Phase 3 requirements and offers strategies for equipping, suggesting either waiting for clearer regulations or installing a diversity transponder now.
• While providing foundational advice for building a home flight simulator, the publication states it does not plan to recommend specific hardware due to market variety.

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