CRO1 Site Information Form International GPS Service for Geodynamics 0. Form Prepared by (full name) : David A. Stowers Date Prepared : 13-MAY-1997 Report Type : UPDATE Prepared Using : 1. Site Identification of the GPS Monument Site Name : St. Croix VLBA Four Character ID : CRO1 Monument Inscription : St. Croix VLBA RM 1 IERS DOMES Number : 43201M001 CDP Number : JPL 4023 Date Installed : 1994 hh:mm UT Geologic Characteristic : (BEDROCK/CLAY/CONGLOMERATE/GRAVEL/SAND/etc) Bedrock Type : (IGNEOUS/METAMORPHIC/SEDIMENTARY) Bedrock Condition : (FRESH/JOINTED/WEATHERED) Fracture Spacing : (1-10 cm/10-50 cm/50-200 cm/over 200 cm) Notes : (multiple lines) Additional Information : The monument is a 0.457m diameter stainless : steel plate set in a 0.762m diameter concrete : monolith that projects 0.635m above grade. : The monument is located approximately 82m : northwest of the 25m VLBA antenna. 2. Site Location Information City or Town : Christiansted State or Province : Country : United States Virgin Islands (USA) Tectonic Plate : Caribbean Approximate Position X coordinate (m) : 2607771.2130 Y coordinate (m) : -5488076.8781 Z coordinate (m) : 1932767.6877 Latitude (deg) : 17.7568 Longitude (deg) : -64.5843 Elevation (m) : -31.8280 Additional Information : The site is located at the NRAO VLBA facility : on the northeast tip of St. Croix. 3. GPS Receiver Information 3.1 Receiver Type : ROGUE SNR-8000 Serial Number : T-133 Firmware Version : 2.8 Date Installed : 16-JAN-1994 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : (multiple lines) 3.2 Receiver Type : ROGUE SNR-8000 Serial Number : T356 Firmware Version : 3.2 link 03/09/95 Date Installed : 13-OCT-1995 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : (multiple lines) 3.x Receiver Type : Serial Number : Firmware Version : Date Installed : (dd-MMM-yyyy hh:mm UT) Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : (multiple lines) 4. GPS Antenna Information 4.1 Antenna Type : DORNE MARGOLIN T Serial Number : 133 Antenna Height (m) : 0.0614 Antenna Reference Point : BPA Degree Offset from North : Antenna Radome Type : Date Installed : 16-JAN-1994 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : (multiple lines) 4.2 Antenna Type : DORNE MARGOLIN T Serial Number : 484 Antenna Height (m) : 0.0814 m Antenna Reference Point : BPA Degree Offset from North : Antenna Radome Type : Date Installed : 13-OCT-1995 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : (multiple lines) 4.x Antenna Type : Serial Number : Antenna Height (m) : (m) Antenna Reference Point : (ARP/BCR/BPA) Degree Offset from North : Antenna Radome Type : Date Installed : (dd-MMM-yyyy hh:mm UT) Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : (multiple lines) 5. Local Site Ties 5.x Monument Name : Site Ref CDP Number : (XXXX) Site Ref Domes Number : (XXXXXXXXX) Differential Components from GPS Mark to Site Reference (ITRS) dx (m) : (m) dy (m) : (m) dz (m) : (m) Accuracy (mm) : (mm) Date Measured : (dd-MMM-yyyy hh:mm UT) Additional Information : (multiple lines) 6. Frequency Standard 6.1 Standard Type : INTERNAL Frequency : Effective Dates : 13-OCT-1995 - dd-MMM-yyyy) Notes : (multiple lines) 6.x Standard Type : (H-MASER/CESIUM/QUARTZ/INTERNAL/RUBIDIUM) Frequency : Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : (multiple lines) 7. Collocation Information 7.x Instrumentation Type : VLBI Status : (PERMANENT/MOBILE) Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : (multiple lines) 8. Meteorological Instrumentation 8.1 Humidity Sensor Model : Manufacturer : Data Frequency : Accuracy (% rel h) : (% rel h) Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : (multiple lines) 8.2 Pressure Sensor Model : Manufacturer : Data Frequency : Accuracy (mbar) : (mbar) Height Diff to GPS (m) : (m) Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : (multiple lines) 8.3 Temperature Sensor Model : Manufacturer : Data Frequency : Accuracy (deg C) : (deg C) Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : (multiple lines) 8.4 Water Vapor Radiometer : Manufacturer : Distance to GPS (m) : (m) Elev Diff to GPS (m) : (m) Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : (multiple lines) 8.5 Other Instrumentation : (multiple lines) 9. On-Site, Point of Contact Agency Information Agency : National Radio Astronomy Observatory (NRAO) Mailing Address : NRAO St. Croix VLBA Station : P.O. Box 24878 : Gallows Bay Station, Christiansted : St. Croix, USVI 00824-0878 Primary Contact Contact Name : John Williams/Ronald Lindsey Telephone (primary) : (809) 773-4448 Telephone (secondary) : Fax : E-mail : vlbasc@vlbacc.nrao.edu Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : (multiple lines) 10. Responsible Agency (if different from 9.) Agency : JPL Mailing Address : 4800 Oak Grove Drive : Pasadena, CA Primary Contact Contact Name : David A. Stowers Telephone (primary) : 818-354-7055 Telephone (secondary) : Fax : 818-393-4965 E-mail : dstowers@jpl.nasa.gov Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : (multiple lines) 11. More Information URL for More Information : Hardcopy on File Site Map : x Site Diagram : x Horizon Mask : 1994 Monument Description : x Site Pictures : x Additional Information : (multiple lines) Antenna Graphics with Dimensions TURBOROGUE: DORNE MARGOLIN T ----- / + \ <-- 0.128 L2 | + | <-- 0.110 L1 +--------------------------------------------------+ <-- 0.102 TCR | | | | | | | | +-+--------------------------------------------------+-+ <-- 0.038 +-------------------+-------------+--------------------+ <-- 0.035 BCR | | =| | +------x------+ <-- 0.000 ARP <-- 0.381 --> ARP: Antenna Reference Point L1 : L1 Phase Center L2 : L2 Phase Center TCR: Top of Chokering BCR: Bottom of Chokering