DIAB Site Information Form International GPS Service for Geodynamics 0. Form Prepared by (full name) : Ray Baxter Date Prepared : 17-Aug-1999 Report Type : Update Prepared Using : GNU Emacs 1. Site Identification of the GPS Monument Site Name : Mt. Diablo Four Character ID : DIAB Monument Inscription : None IERS DOMES Number : None CDP Number : None Date Installed : 21-May-1998 23:45 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 : Reinforced concrete monument, approximately 0.3m high. Monument is fastened to underlying rock with cemented reinforcing rods. Threaded 5/8" rod is cemented about 0.8m deep into concrete. 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 Concord State or Province : California Country : USA Tectonic Plate : Pacific-North America plate boundary Approximate Position X coordinate (m) : -2665287.6562 Y coordinate (m) : -4279361.8938 Z coordinate (m) : 3895422.8493 Latitude (deg) : 37.8786 N Longitude (deg) : 121.9156 W Elevation (m) : 990.4469 Additional Information : 3. GPS Receiver Information 3.1 Receiver Type : ASHTECH Z-XII3 Serial Number : LP01387 Firmware Version : 1F60 Date Installed : 21-May-1998 23:45 UT Date Removed : 22-Jul-1999 20:52 UT Additional Information : None 3.2 Receiver Type : ASHTECH Z-XII3 Serial Number : LP01387 Firmware Version : CC00 Date Installed : 22-Jul-1999 20:52 UT Date Removed : Additional Information : None 4. GPS Antenna Information 4.1 Antenna Type : ASH700936D_M NONE Serial Number : 12739 Antenna Height (m) : 0.0837 Antenna Reference Point : BPA Degree Offset from North : 0 Antenna Radome Type : None Date Installed : 21-May-1998 23:45 UT Date Removed : 22-Jul-1999 20:52 UT Additional Information : None 4.2 Antenna Type : ASH700936D_M SCIT Serial Number : 12739 Antenna Height (m) : 0.1315 Antenna Reference Point : BPA Degree Offset from North : 0 Antenna Radome Type : SCIGN Tall Dome 00203 Date Installed : 22-Jul-1999 22:12 UT Date Removed : Additional Information : SCIGN Adaptor 0132 HI from previous refernce mark: Reference mark to base = 103.5 mm Base of adapter to SCIGN mark = 19.685 mm SCIGN mark to BPA = 8.3mm 5. Local Site Ties - None to date 6. Frequency Standard 6.1 Standard Type : INTERNAL Frequency : Effective Dates : 21-May-1998 - 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 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