HOLC Site Information Form International GPS Service for Geodynamics 0. Form Prepared by (full name) : Ken Hudnut, John Galtezka Date Prepared : 05-DEC-1996 Report Type : UPDATE Prepared Using 1. Site Identification of the GPS Monument Site Name : Holcomb Ridge Four Character ID : HOLC Monument Inscription : None IERS DOMES Number : 40404M101 CDP Number : (XXXX) Date Installed : 12-AUG-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 : 3/4" diameter, stainless steel rod with : removable brass adaptor atop vertical rod. Hard : limestone foundation, 4 10-12 foot stainless : steel rods - one vertical, three oblique, : welded above surface. Vertical datum is a filed : notch in the vertical rod. Legs are isolated : from shallow rock and soil by PVC in the : uppermost ~5'. Antenna housing is Kearney- : Powerglass fiberglass (rounded rectangular : shape). Antenna is mounted low to the ground. : SCIGN - Southern California Integrated GPS : Network 2. Site Location Information City or Town : SE of Pearblossom, Los Angeles County State or Province : California Country : USA Tectonic Plate : Pacific-North American plate boundary Approximate Position X coordinate (m) : -2459517.863 Y coordinate (m) : -4655992.343 Z coordinate (m) : 3589168.783 Latitude (deg) : ( dd.dddd N/S) Longitude (deg) : (ddd.dddd E/W) Elevation (m) : (m) Additional Information : ITRF92 coordinates. Epoch 1994.75 3. GPS Receiver Information 3.1 Receiver Type : ASHTECH ZX-II3 (Z12) Model 700570-6B Serial Number : 03377 (Loaner # 1) Firmware Version : NAV 1D00, CHN 1C01 Date Installed : 12-AUG-1994 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : First measurements 3.2 Receiver Type : ASHTECH Low Power Z-XII (Z12) Model 700845-6(1) Serial Number : 04368 Firmware Version : NAV 1E24, CHN 1C70 Date Installed : 15-MAY-1995 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : exchanged Loaner #1 for USGS rec/ant unit 3.3 Receiver Type : ASHTECH Low Power Z-XII (Z12) Model 700845-6(1) Serial Number : 04368 Firmware Version : NAV 1E95 1D01 Date Installed : 24-SEP-1996 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : firmware upgrade 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 : ASHTECH L1/L2 P Model 700718-B (Lg Ground Plane) Serial Number : 10293 Antenna Height (m) : 0.0876 Antenna Reference Point : BPA Degree Offset from North : Antenna Radome Type : Date Installed : 12-AUG-1994 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : field measurement 10.35 cm to base of wide part 4.2 Antenna Type : ASHTECH L1/L2 P Model 700718-B (Lg Ground Plane) Serial Number : 10485 Antenna Height (m) : 0.0870 Antenna Reference Point : BPA Degree Offset from North : Antenna Radome Type : Date Installed : 15-MAY-1995 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : same filed notch used as vertical datum. DM : type antenna installed, old LGP antenna removed. 4.3 Antenna Type : ASHTECH Model 700936-A (Metal Choke Ring) Serial Number : 11477 Antenna Height (m) : 0.0850 Antenna Reference Point : ARP/BPA Degree Offset from North : Antenna Radome Type : Date Installed : 26-MAY-1995 hh:mm UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : field measurement 10.30 cm to base of wide part : of antenna base reduced by 1.6 cm correction : (to base of narrow part) : exchanged Loaner #1 for USGS rec/ant unit 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 : 12-AUG-1994 - 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 Mailing Address : 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@usgs.gov Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : (multiple lines) 10. Responsible Agency (if different from 9.) Agency : Scripps Institution of Oceanography Mailing Address : IGPP 0225, Scripps Institution of : Oceanography : 9500 Gilman Drive, La Jolla, CA 92093-0225 Primary Contact Contact Name : Yehuda Bock / Jeff Behr Telephone (primary) : (619) 534-7692 (0229/5292) Telephone (secondary) : Fax : (619) 534-9873 E-mail : bock@pgga.ucsd.edu, behr@pgga.ucsd.edu 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 same as for TURBOROGUE DM-T (tests pending) ----- / + \ <-- 0.128 L2 | + | <-- 0.110 L1 +--------------------------------------------------+ <-- 0.102 TCR | | | | | | | | +-+--------------------------------------------------+-+ <-- 0.038 +-------------------+-------------+--------------------+ <-- 0.035 BCR | | =| | +------x------+ <-- 0.000 m ARP -0.085 m ARP to vert datum mark <-- 0.381 --> LGP antenna replaced by DM type antenna on 5-26-95 ASHTECH: GEODETIC L1/L2 P Large Ground Plane ^ +-------------------+ +-+--+-+-------+-----------+-----------+--------+-+--+-+ <-- 0.064 TGP=L1=L2 +-+--+-+------------+-------------+-------------+-+--+-+ <-- 0.??? BGP |-------------| |-------------| |-------------| |-------------| +------x------+ <-- 0.000 ARP=BPA -0.087 m ARP to vert datum mark <-- 0.080 --> <-- 0.3474 --> ARP: Antenna Reference Point L1 : L1 Phase Center L2 : L2 Phase Center TCR: Top of Chokering BCR: Bottom of Chokering TGP: Top of Ground Plane BGP: Bottom of Ground Plane TPA: Top of Preamplifier BPA: Bottom of Preamplifier