***ITRF2014***
TTCD NGS TEST CTR (TTCD), VIRGINIA
Retrieved from NGS DataBase on 03/28/25 at 14:23:11.
_____________________________________________________________________________
| |
| Antenna Reference Point(ARP): TTCD NGS TEST CTR CORS ARP |
| -------------------------------------------------------- |
| PID = DS3314 |
| |
| |
| ITRF2014 POSITION (EPOCH 2010.0) |
| Computed in Mar 2025 using 22 days of data. |
| X = 1097053.130 m latitude = 38 12 08.53497 N |
| Y = -4897222.404 m longitude = 077 22 23.96678 W |
| Z = 3923142.590 m ellipsoid height = 35.776 m |
| |
| ITRF2014 VELOCITY |
| Predicted with HTDP_3.3.0 Mar 2025. |
| VX = -0.0146 m/yr northward = 0.0039 m/yr |
| VY = -0.0007 m/yr eastward = -0.0144 m/yr |
| VZ = 0.0030 m/yr upward = -0.0001 m/yr |
| |
| |
| NAD_83 (2011) POSITION (EPOCH 2010.0) |
| Transformed from ITRF2014 (epoch 2010.0) position in Mar 2025. |
| X = 1097053.884 m latitude = 38 12 08.50548 N |
| Y = -4897223.864 m longitude = 077 22 23.94965 W |
| Z = 3923142.684 m ellipsoid height = 37.083 m |
| |
| NAD_83 (2011) VELOCITY |
| Transformed from ITRF2014 velocity in Mar 2025. |
| VX = 0.0017 m/yr northward = -0.0008 m/yr |
| VY = 0.0006 m/yr eastward = 0.0018 m/yr |
| VZ = -0.0012 m/yr upward = -0.0009 m/yr |
|_____________________________________________________________________________|
| |
| L1 Phase Center of the current GPS antenna: TTCD NGS TEST CTR CORS L1PC |
| -------------------------------------------------------------------------- |
| The VeraChoke 6050 with 50 dB LNA, GPS/QZSS antenna |
| (Antenna Code = TWIVC6050 SCIT) was installed on 05Feb2025. |
| The L2 phase center is 0.012 m above the L1 phase center. |
| PID = DS3315 |
| |
| |
| ITRF2014 POSITION (EPOCH 2010.0) |
| Computed in Mar 2025 using 22 days of data. |
| X = 1097053.152 m latitude = 38 12 08.53498 N |
| Y = -4897222.502 m longitude = 077 22 23.96678 W |
| Z = 3923142.669 m ellipsoid height = 35.903 m |
| |
| The ITRF2014 VELOCITY of the L1 PC is the same as that for the ARP. |
| |
| |
| NAD_83 (2011) POSITION (EPOCH 2010.0) |
| Transformed from ITRF2014 (epoch 2010.0) position in Mar 2025. |
| X = 1097053.906 m latitude = 38 12 08.50549 N |
| Y = -4897223.961 m longitude = 077 22 23.94965 W |
| Z = 3923142.763 m ellipsoid height = 37.210 m |
| |
| The NAD_83 (2011) VELOCITY of the L1 PC is the same as that for the ARP. |
|_____________________________________________________________________________|
| |
| Monument: TTCD NGS TEST CTR GRP |
| ------------------------------- |
| PID = DS3316 |
| Inscribed: UNKNOWN |
| |
| |
| ITRF2014 POSITION (EPOCH 2010.0) |
| Computed in Mar 2025 using 22 days of data. |
| X = 1097053.129 m latitude = 38 12 08.53497 N |
| Y = -4897222.398 m longitude = 077 22 23.96677 W |
| Z = 3923142.585 m ellipsoid height = 35.768 m |
| |
| The ITRF2014 VELOCITY of the monument is the same as that for the ARP. |
| |
| |
| NAD_83 (2011) POSITION (EPOCH 2010.0) |
| Transformed from ITRF2014 (epoch 2010.0) position in Mar 2025. |
| X = 1097053.883 m latitude = 38 12 08.50548 N |
| Y = -4897223.858 m longitude = 077 22 23.94965 W |
| Z = 3923142.679 m ellipsoid height = 37.075 m |
| |
| The NAD_83 (2011) VELOCITY of the monument 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 and antenna-phase-center
offset are properly modeled. See next comment.
* The coordinates shown on this page were computed using absolute antenna
calibrations. CORS coordinates began using absolute antenna calibrations
beginning with IGS08 and NAD 83 (2011, MA11, PA11). For additional
information on the derivation of these positions and velocities and
antenna calibrations consult:
http://geodesy.noaa.gov/CORS/coords.shtml
http://geodesy.noaa.gov/ANTCAL
* For more site specific information on the equipment history and
monumentation type consult:
ftp://geodesy.noaa.gov/cors/station_log/ttcd.log.txt
http://geodesy.noaa.gov/cgi-cors/corsage_2.prl?site=ttcd