***ITRF 00*** INT AIRPORT COOP (ANC1), ALASKA Effective date of new coordinate April 30, 2007 Revised April 8, 2008 _____________________________________________________________________________ | | | Antenna Reference Point(ARP): INT AIRPORT COOP CORS ARP | | ------------------------------------------------------- | | PID = DE6227 | | | | | | ITRF00 POSITION (EPOCH 1997.0) | | Computed in Apr. 2008 using 22 days of data. | | X = -2669317.063 m latitude = 61 10 56.57058 N | | Y = -1541331.599 m longitude = 149 59 48.37044 W | | Z = 5565207.744 m ellipsoid height = 46.515 m | | | | ITRF00 VELOCITY | | Estimated in Apr. 2008 using 413 days of data. | | VX = -0.0140 m/yr northward = -0.0109 m/yr | | VY = 0.0053 m/yr eastward = -0.0116 m/yr | | VZ = -0.0053 m/yr upward = -0.0001 m/yr | | | | | | NAD_83 (CORS96) POSITION (EPOCH 2003.0) | | Transformed from ITRF00 (epoch 1997.0) position in Apr. 2008. | | X = -2669316.362 m latitude = 61 10 56.56684 N | | Y = -1541332.616 m longitude = 149 59 48.28806 W | | Z = 5565207.324 m ellipsoid height = 46.100 m | | | | NAD_83 (CORS96) VELOCITY | | Transformed from ITRF00 velocity in Apr. 2008. | | VX = 0.0080 m/yr northward = 0.0108 m/yr | | VY = 0.0060 m/yr eastward = -0.0012 m/yr | | VZ = 0.0044 m/yr upward = -0.0009 m/yr | |_____________________________________________________________________________| | | | L1 Phase Center of the current GPS antenna: INT AIRPORT COOP CORS L1 PC C | | ------------------------------------------------------------------------- | | The L1/L2 choke ring, using DM T style antenna | | (Antenna Code = LEIAT504GG LEIS) was installed on 04/30/07. | | The L2 phase center is 0.020 m above the L1 phase center. | | PID = DK2743 | | | | | | ITRF00 POSITION (EPOCH 1997.0) | | Computed in Apr. 2008 using 22 days of data. | | X = -2669317.104 m latitude = 61 10 56.57063 N | | Y = -1541331.626 m longitude = 149 59 48.37026 W | | Z = 5565207.836 m ellipsoid height = 46.619 m | | | | The ITRF00 VELOCITY of the L1 PC is the same as that for the ARP. | | | | | | NAD_83 (CORS96) POSITION (EPOCH 2003.0) | | Transformed from ITRF00 (epoch 1997.0) position in Apr. 2008. | | X = -2669316.403 m latitude = 61 10 56.56689 N | | Y = -1541332.642 m longitude = 149 59 48.28787 W | | Z = 5565207.416 m ellipsoid height = 46.204 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 & NAD_83 positions & velocities were revised in Apr. 2008. ************************************************** old coordinate ************************************************** ***ITRF 00*** INT AIRPORT COOP (ANC1), ALASKA Retrieved from NGS DataBase on 04/08/08 at 17:31:55. _____________________________________________________________________________ | | | Antenna Reference Point(ARP): INT AIRPORT COOP CORS ARP | | ------------------------------------------------------- | | PID = DE6227 | | | | | | ITRF00 POSITION (EPOCH 1997.0) | | Computed by OPUS in Apr 2003 using 10 days of data. | | X = -2669317.020 m latitude = 61 10 56.57347 N | | Y = -1541331.542 m longitude = 149 59 48.37230 W | | Z = 5565207.810 m ellipsoid height = 46.542 m | | | | ITRF00 VELOCITY | | Predicted with on-line HTDP Apr 2003. | | VX = -0.0220 m/yr northward = -0.0217 m/yr | | VY = -0.0007 m/yr eastward = -0.0104 m/yr | | VZ = -0.0097 m/yr upward = 0.0009 m/yr | | | | | | NAD_83 (CORS96) POSITION (EPOCH 2003.0) | | Computed by OPUS in Apr 2003 using 10 days of data. | | X = -2669316.368 m latitude = 61 10 56.56762 N | | Y = -1541332.594 m longitude = 149 59 48.28952 W | | Z = 5565207.364 m ellipsoid height = 46.132 m | | | | NAD_83 (CORS96) VELOCITY | | Predicted with on-line HTDP Apr 2003. | | 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: INT AIRPORT COOP CORS L1 PC C | | ------------------------------------------------------------------------- | | The L1/L2 choke ring, using DM T style antenna | | (Antenna Code = LEIAT504GG LEIS) was installed on 04/30/07. | | The L2 phase center is 0.020 m above the L1 phase center. | | PID = DK2743 | | | | | | ITRF00 POSITION (EPOCH 1997.0) | | Computed by OPUS in Apr 2003 using 10 days of data. | | X = -2669317.061 m latitude = 61 10 56.57352 N | | Y = -1541331.569 m longitude = 149 59 48.37211 W | | Z = 5565207.902 m ellipsoid height = 46.646 m | | | | The ITRF00 VELOCITY of the L1 PC is the same as that for the ARP. | | | | | | NAD_83 (CORS96) POSITION (EPOCH 2003.0) | | Computed by OPUS in Apr 2003 using 10 days of data. | | X = -2669316.409 m latitude = 61 10 56.56767 N | | Y = -1541332.621 m longitude = 149 59 48.28934 W | | Z = 5565207.456 m ellipsoid height = 46.237 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.