Posted 8/2/2018 18:42 (#6907746 - in reply to #6907702) Subject: RE: No more SF1 or WAAS???
Missouri
WAAS is a differential correction to GPS. It's broadcast from WAAS satellites, and it's free. WAAS satellites are not actually GPS satellites. WAAS satellites are geostationary, GPS satellites are not. A WAAS signal without a GPS signal would be useless. There are others here that can comment in greater detail, or even correct my information if it's wrong.