HOPB Site Information Form International GPS Service for Geodynamics 0. Form Prepared by (full name) : Nicolas Houlie Date Prepared : 25-Jun-2007 Report Type : UPDATE Prepared Using : VI 1. Site Identification of the GPS Monument Site Name : Hopland - BARD Station Four Character ID : HOPB Monument Inscription : None IERS DOMES Number : None CDP Number : None Date Installed : 26-Aug-1995 00:00 UT Geologic Characteristic : BEDROCK 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 : Monument drilled and cemented into massive outcrop. Threaded 5/8" rod is cemented about 0.8m deep into rock with stainless steel collar at the surface. Antenna threads onto rod in reproducible manner. Mark is top of washer at center of rod. Additional Information : Bay Area Regional Deformation Array 2. Site Location Information City or Town : Rural, near Hopland State or Province : California Country : USA Tectonic Plate : Pacific-North America plate boundary Approximate Position X coordinate (m) : -2708981.7242 Y coordinate (m) : -4159579.5771 Z coordinate (m) : 3992123.8054 Latitude (deg) : 38.9918 N Longitude (deg) : 123.0747 W Elevation (m) : 363.2952 Additional Information : On Univ of Calif's Hopland Field Station 3. GPS Receiver Information 3.1 Receiver Type : ASHTECH Z-XII3 Serial Number : 700571B02283 Firmware Version : 1C01 Date Installed : 26-Aug-1995 00:00 UT Date Removed : 05-Jun-1996 23:13 UT Additional Information : None 3.2 Receiver Type : ASHTECH Z-XII3 Serial Number : 700571B02283 Firmware Version : 1E86 Date Installed : 06-Jun-1996 01:28 UT Date Removed : 08-Sep-1997 09:47 UT Additional Information : None 3.3 Receiver Type : ASHTECH Z-XII3 Serial Number : 700571Bo2283 Firmware Version : 1F60 Date Installed : 09-Sep-1997 00:33 UT Date Removed : 04-Aug-1999 19:23 UT Additional Information : None 3.4 Receiver Type : ASHTECH Z-XII3 Serial Number : LP019990501 Firmware Version : CC00 Date Installed : 04-Aug-1999 20:38 UT Date Removed : 08-May-2007 19:30 UT Additional Information : None 3.5 Receiver Type : TRIMBLE 4000SSI Serial Number : 3314A02884 Firmware Version : N/A Date Installed : 08-May-2007 00:30 UT Date Removed : Additional Information : No Antenna change, Antenna cable changed 4. GPS Antenna Information 4.1 Antenna Type : ASH700228D ENCL Serial Number : 700228D2134 Antenna Height (m) : -0.015m Antenna Reference Point : BPA Degree Offset from North : 16 (E) Antenna Radome Type : Plexiglass Skylight Date Installed : 26-Aug-1995 00:00 UT Date Removed : 08-Sep-1997 09:47 UT Additional Information : Antenna height measured relative to a different mark than given in Section 1. 4.2 Antenna Type : ASH700936C_M NONE Serial Number : 700936-C Antenna Height (m) : 0.0341 Antenna Reference Point : BPA Degree Offset from North : 0 Antenna Radome Type : None Date Installed : 09-Sep-1997 00:33 UT Date Removed : 04-Aug-1999 19:23 UT Additional Information : None 4.3 Antenna Type : ASH700936C_M SCIS Serial Number : 700936-C Antenna Height (m) : 0.0341 Antenna Reference Point : BPA Degree Offset from North : 0 Antenna Radome Type : SCIGN Short 00402 Date Installed : 04-Aug-1999 20:38 UT Date Removed : Additional Information : None 5. Local Site Ties - None to date 6. Frequency Standard 6.1 Standard Type : INTERNAL Frequency : Effective Dates : 26-AUG-1995 - Present Notes : None 7. Collocation Information - None 8. Meteorological Instrumentation - None 9. On-Site, Point of Contact Agency Information Agency : Berkeley Seismological Laboratory Mailing Address : University of California 475 McCone Hall Berkeley CA 94720-4760 Primary Contact Contact Name : Ray Baxter Telephone (primary) : 510.642.3977 Telephone (secondary) : 510.643.3898 Fax : 510.643.5811 E-mail : bard@seismo.berkeley.edu Secondary Contact Contact Name : Doug Neuhauser Telephone (primary) : 510.642.3977 Telephone (secondary) : 510.642.0931 Fax : 510.643.5811 E-mail : bard@seismo.berkley.edu Additional Information : None 10. Responsible Agency (if different from 9.) Agency : Same as above 11. More Information URL for More Information : http://www.quake.geo.berkeley.edu/bard Hardcopy on File Site Map : No Site Diagram : No Horizon Mask : No Monument Description : No Site Pictures : No Additional Information : No Antenna Graphics with Dimensions Ashtech: GEODETIC L1/L2 ^ +-------------------+ +--+ +-------+-----------+-----------+--------+ +--+ <--0.064 TGP=L1=L2 +-+--+ +------------+-------------+-------------+ +--+-+ <-- 0.060 BGP |-------------| |-------------| |-------------| |-------------| +------x------+ <-- 0.000 BPA/ARP <-- 0.080 --> <-- 0.2636 --> <-- 0.286 --> Ashtech w/Dorne-Margolin Choke Ring ----- / + \ <-- 0.128 L2 | + | <-- 0.110 L1 +--------------------------------------------------+ <-- 0.102 TCR | | | | | | | | +-+--------------------------------------------------+-+ <-- 0.038 BCR +-------------------+-------------+--------------------+ <-- 0.035 BGP | | =| | +------x------+ <-- 0.000 m BPA/ARP <-- 0.381 --> NOTE: Dimensions and Offsets Presumed to be same as for TurboRogue DM-T (tests pending) 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