what is a LPV approach?
LPV uses the SBAS, where the signal correction generated by the satellite, The GPS is hyper accurate and includes vertical. So you can fly the procedure to lower minima.
GBAS provides the vertical guidance as well, but the signal correction is ground based. The AC follows the broadcast flightpath (horizontal and vertical)
WAAS was really developed for General Aviation, not commercial.
TOTAL Estimated WAAS LPV Equipped Aircraft – 79,105
Garmin – 73,184 aircraft − GA Aircraft (See FAA Garmin Approved Model List (AML)). Most GA Part 23 aircraft. − GTN series – Lear 35/35A, 36/36A,24 – Phenom300 with G-3000
Universal Avionics – 2,380 aircraft − 122 fixed wing and 12 helicopter types and models RockwellCollins – 1,930 aircraft − 39 Types and models − Latest Aircraft – Embraer Legacy 500
Honeywell /CMC Electronics) – 921 aircraft − 22 types and models
Avidyne – 238 aircraft − 6 types and models (Cirrus SR 20 & 22, Piper Matrix & Mirage, Piper Saratoga NX, and EA-500) − IFD 540 WAAS LPV - (STC complete July 2014 – AML STC approved for over 1,000 aircraft makes and models) Genesys Aerosystems (Chelton) – 247 aircraft − Bell-407 & 412, Cessna 501, 550, Piper PA-42, Beechcraft C-90&A, EurocopterAS-350, AgustaAW109SP, Beechcraft T-34B, Kawsaka
Innovative Solutions & Support (IS&S) – 200 aircraft − Eclipse 550/500 −
Boeing 737-200, 737-400 (pending)
Thales – 5 aircraft − Airbus A300-600ST (Beluga) − Airbus A400M (Military) − Airbus A350XWB - pending