***ITRF 00*** U OF MD BALT COOP (UMBC), MARYLAND Revised coordinate: Feb 26, 2008 _____________________________________________________________________________ | | | Antenna Reference Point(ARP): U OF MD BALT COOP CORS ARP | | -------------------------------------------------------- | | PID = DF6305 | | | | | | ITRF00 POSITION (EPOCH 1997.0) | | Computed in Feb. 2008 using 930 days of data. | | X = 1136717.441 m latitude = 39 15 24.38976 N | | Y = -4812975.828 m longitude = 076 42 41.47606 W | | Z = 4014471.484 m ellipsoid height = 64.678 m | | | | ITRF00 VELOCITY | | Estimated in Feb. 2008 using 930 days of data. | | VX = -0.0170 m/yr northward = 0.0010 m/yr | | VY = -0.0022 m/yr eastward = -0.0171 m/yr | | VZ = -0.0002 m/yr upward = -0.0015 m/yr | | | | | | NAD_83 (CORS96) POSITION (EPOCH 2002.0) | | Transformed from ITRF00 (epoch 1997.0) position in Feb. 2008. | | X = 1136717.980 m latitude = 39 15 24.36101 N | | Y = -4812977.294 m longitude = 076 42 41.46823 W | | Z = 4014471.606 m ellipsoid height = 65.956 m | | | | NAD_83 (CORS96) VELOCITY | | Transformed from ITRF00 velocity in Feb. 2008. | | VX = -0.0006 m/yr northward = -0.0026 m/yr | | VY = -0.0004 m/yr eastward = -0.0007 m/yr | | VZ = -0.0031 m/yr upward = -0.0018 m/yr | |_____________________________________________________________________________| | | | L1 Phase Center of the current GPS antenna: U OF MD BALT COOP CORS L1 PC C | | -------------------------------------------------------------------------- | | The Trimble Zephyr Geodetic with GP antenna | | (Antenna Code = TRM41249.00) was installed on 05/04/02. | | The L2 phase center is 0.003 m below the L1 phase center. | | PID = DF6306 | | | | | | ITRF00 POSITION (EPOCH 1997.0) | | Computed in Feb. 2008 using 930 days of data. | | X = 1136717.454 m latitude = 39 15 24.38977 N | | Y = -4812975.881 m longitude = 076 42 41.47604 W | | Z = 4014471.529 m ellipsoid height = 64.749 m | | | | The ITRF00 VELOCITY of the L1 PC is the same as that for the ARP. | | | | | | NAD_83 (CORS96) POSITION (EPOCH 2002.0) | | Transformed from ITRF00 (epoch 1997.0) position in Feb. 2008. | | X = 1136717.993 m latitude = 39 15 24.36102 N | | Y = -4812977.347 m longitude = 076 42 41.46821 W | | Z = 4014471.651 m ellipsoid height = 66.028 m | | | | The NAD_83 (CORS96) VELOCITY of the L1 PC is the same as that for the ARP. | |_____________________________________________________________________________| * Latitude, longitude and ellipsoid height are computed from their corresponding cartesian coordinates using dimensions for the GRS 80 ellipsoid: semi-major axis = 6,378,137.0 meters flattening = 1/298.257222101... * WARNING: Mixing of antenna types can lead to errors of up to 10 cm. in height unless antenna-phase-center variation is properly modeled. * The ITRF00 and NAD_83 positions & velocities were revised in Feb. 2008. ****************************************************************** ****************************************************************** Old coordinate ***ITRF 00*** U OF MD BALT COOP (UMBC), MARYLAND Retrieved from NGS DataBase on 02/26/08 at 19:09:36. _____________________________________________________________________________ | | | Antenna Reference Point(ARP): U OF MD BALT COOP CORS ARP | | -------------------------------------------------------- | | PID = DF6305 | | | | | | ITRF00 POSITION (EPOCH 1997.0) | | Computed by OPUS in Jul 2002 using 10 days of data in the 5th month. | | X = 1136717.432 m latitude = 39 15 24.38917 N | | Y = -4812975.854 m longitude = 076 42 41.47667 W | | Z = 4014471.479 m ellipsoid height = 64.693 m | | | | ITRF00 VELOCITY | | Predicted with on-line HTDP Jul 2002. | | VX = -0.0164 m/yr northward = 0.0035 m/yr | | VY = -0.0018 m/yr eastward = -0.0164 m/yr | | VZ = 0.0029 m/yr upward = 0.0003 m/yr | | | | | | NAD_83 (CORS96) POSITION (EPOCH 2002.0) | | Computed by OPUS in Jul 2002 using 10 days of data in the 5th month. | | X = 1136717.974 m latitude = 39 15 24.36083 N | | Y = -4812977.317 m longitude = 076 42 41.46869 W | | Z = 4014471.616 m ellipsoid height = 65.979 m | | | | NAD_83 (CORS96) VELOCITY | | Predicted with on-line HTDP Jul 2002. | | VX = 0.0000 m/yr northward = 0.0000 m/yr | | VY = 0.0000 m/yr eastward = 0.0000 m/yr | | VZ = 0.0000 m/yr upward = 0.0000 m/yr | |_____________________________________________________________________________| | | | L1 Phase Center of the current GPS antenna: U OF MD BALT COOP CORS L1 PC C | | -------------------------------------------------------------------------- | | The Trimble Zephyr Geodetic with GP antenna | | (Antenna Code = TRM41249.00) was installed on 05/04/02. | | The L2 phase center is 0.003 m below the L1 phase center. | | PID = DF6306 | | | | | | ITRF00 POSITION (EPOCH 1997.0) | | Computed by OPUS in Jul 2002 using 10 days of data in the 5th month. | | X = 1136717.445 m latitude = 39 15 24.38917 N | | Y = -4812975.907 m longitude = 076 42 41.47664 W | | Z = 4014471.524 m ellipsoid height = 64.765 m | | | | The ITRF00 VELOCITY of the L1 PC is the same as that for the ARP. | | | | | | NAD_83 (CORS96) POSITION (EPOCH 2002.0) | | Computed by OPUS in Jul 2002 using 10 days of data in the 5th month. | | X = 1136717.987 m latitude = 39 15 24.36084 N | | Y = -4812977.371 m longitude = 076 42 41.46867 W | | Z = 4014471.661 m ellipsoid height = 66.050 m | | | | The NAD_83 (CORS96) VELOCITY of the L1 PC is the same as that for the ARP. | |_____________________________________________________________________________| * Latitude, longitude and ellipsoid height are computed from their corresponding cartesian coordinates using dimensions for the GRS 80 ellipsoid: semi-major axis = 6,378,137.0 meters flattening = 1/298.257222101... * WARNING: Mixing of antenna types can lead to errors of up to 10 cm. in height unless antenna-phase-center variation is properly modeled.