CLAR Site Information Form International GPS Service for Geodynamics 0. Form Prepared by (full name) : Ken Hudnut Date Prepared : 31-OCT-1997 Report Type : UPDATE Prepared Using : 1. Site Identification of the GPS Monument Site Name : Claremont College Four Character ID : CLAR Monument Inscription : None IERS DOMES Number : 49906M001 CDP Number : N/A Date Installed : 05-APR-1995 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 : Monument is driven-rod braced type with 4 3/4" : stainless rods to varied depths in a very coarse : cobbled aluvium. Rods driven to refusal : w/Whacker drill. Vertical datum is filed notch : on vertical rod under antenna. : SCIGN - Southern California Integrated GPS : Network 2. Site Location Information City or Town : Claremont State or Province : California Country : USA Tectonic Plate : Pacific-North America plate boundary Approximate Position X coordinate (m) : -2458218.128 Y coordinate (m) : -4680467.721 Z coordinate (m) : 3556758.370 Latitude (deg) : ( dd.dddd N/S) Longitude (deg) : (ddd.dddd E/W) Elevation (m) : (m) Additional Information : Approximate ITRF92 coordinates. Epoch 1995.25 3. GPS Receiver Information 3.1 Receiver Type : ASHTECH Low Power Z-XII Model 700845-6(1) Serial Number : 04368 (USGS Property #G-615679) Firmware Version : NAV 1E24, CHN 1C70 Date Installed : 05-APR-1995 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : First Measurements 3.2 Receiver Type : ASHTECH Low Power Z-XII Model 700845-6(1) Serial Number : 04378 (USGS Property #G-615680) Firmware Version : NAV 1E24, CHN 1C70 Date Installed : 18-APR-1995 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : Rx unit swapped (RAM upgrade) 3.3 Receiver Type : ASHTECH Low Power Z-XII Model 700845-6(1) Serial Number : 04378 (USGS Property #G-615680) Firmware Version : NAV 1E24, CHN 1C70 Date Installed : 19-MAY-1995 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : No changes to the rx unit at this time. 3.4 Receiver Type : ASHTECH Low Power Z-XII Model 700845-6(1) Serial Number : 04378 (USGS Property #G-615680) Firmware Version : NAV 1E95, 1D01 Date Installed : 12-SEP-1996 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : Firmware upgrade. 4. GPS Antenna Information 4.1 Antenna Type : ASHTECH L1/L2 P Model 700718-B (Large Ground Plane) Serial Number : 10940 Antenna Height (m) : 0.1370 Antenna Reference Point : BPA Degree Offset from North : Antenna Radome Type : Date Installed : 05-APR-1995 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : First Measurements 4.2 Antenna Type : ASHTECH L1/L2 P Model 700718-B (Large Ground Plane) Serial Number : 10940 Antenna Height (m) : 0.1370 Antenna Reference Point : BPA Degree Offset from North : Antenna Radome Type : Date Installed : 18-APR-1995 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : No antenna changes at this time. 4.3 Antenna Type : ASHTECH L1/L2 P Model 700936-A (Metal Choke Ring) Serial Number : 11482 Antenna Height (m) : 0.1370 Antenna Reference Point : BPA/ARP Degree Offset from North : Antenna Radome Type : Date Installed : 19-MAY-1995 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : DM type antenna installed, old LGP antenna removed. : NOTE: same filed notch used as vertical datum 4.4 Antenna Type : ASHTECH L1/L2 P Model 700936-A (Metal Choke Ring) Serial Number : 11482 Antenna Height (m) : 0.1370 Antenna Reference Point : BPA/ARP Degree Offset from North : Antenna Radome Type : Date Installed : 12-SEP-1996 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : No changes to antenna at this time. 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 : dd-MMM-yyyy - 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 : (DORIS/GLONASS/PRARE/SLR/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 : U.S. Geological Survey : Office of Earthquakes, Volcanoes and : Engineering Mailing Address : U.S. Geological Survey : 525 South Wilson Ave. : Pasadena, CA 91106 Primary Contact Contact Name : Kenneth W. Hudnut Telephone (primary) : (818) 583-7232 Telephone (secondary) : Fax : (818) 583-7827 E-mail : hudnut@seismo.gps.caltech.edu Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : (multiple lines) 10. Responsible Agency (if different from 9.) Agency : (multiple lines) Mailing Address : (multiple lines) : : Primary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : 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 : (Y) Site Diagram : (Y) Horizon Mask : (Y) Monument Description : (Y) Site Pictures : (Y) Additional Information : (multiple lines) Antenna Graphics with Dimensions ASHTECH: Metal Choke Ring Type NOTE: Dimensions and Offsets Presumed to be the same as for the TurboRogue DM-T (tests pending) ----- / + \ <-- 0.128 L2 | + | <-- 0.110 L1 +--------------------------------------------------+ <-- 0.102 TCR | | | | | | | | +-+--------------------------------------------------+-+ <-- 0.038 +-------------------+-------------+--------------------+ <-- 0.035 BCR | | =| | +------x------+ <-- 0.000 ARP <-- 0.381 --> ( NOTE: -0.1370 m ARP to vert. datum mark) ARP: Antenna Reference Point L1 : L1 Phase Center L2 : L2 Phase Center TCR: Top of Chokering BCR: Bottom of Chokering NOTE: LGP removed on approx. May 19, 1995 (exchanged for ASHTECH DM type - see above) ASHTECH: GEODETIC L1/L2 P Large Ground Plane ^ +-------------------+ +-+--+-+-------+-----------+-----------+--------+-+--+-+ <-- 0.064 TGP=L1=L2 +-+--+-+------------+-------------+-------------+-+--+-+ <-- 0.??? BGP |-------------| |-------------| +-------------+ <-- 0.016 m |---| (NOTE: 1.6 cm difference) +-x-+ <-- 0.000 ARP=BPA (NOTE: we use this!) <-- 0.080 --> (NOTE: -0.1370 m ARP to vert datum mark) <-- 0.3474 --> ARP: Antenna Reference Point L1 : L1 Phase Center L2 : L2 Phase Center TGP: Top of Ground Plane BGP: Bottom of Ground Plane TPA: Top of Preamplifier BPA: Bottom of Preamplifier