11) Geometric b) The Variance-covariance of unknown in GPS position estimation can be transformed from ECEF to local topocentric system. Given the local Topocentric Variance-covariance matrix σx 1.21 2.2 2.1 1.9 2.2 0.91 2.3 3 -WWFY 2.1 2.3 1.51 1.8 3 1.8 2.1 1.9 Calculate GDQP, PDOP, HDOP and VDOP (8 Marks) c) Convert geodetic position 290 deg Long 42 deg latitude ellipsoidal height 0 m into Cartesian geocentric coordinates, Given WGS84 ellipsoid parameters a = 6378137.0m and flattening 1/f = 1/298.257222101 (8 Marks

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