LOWS Site Information Form (site log) International GPS Service See Instructions at: ftp://igscb.jpl.nasa.gov/pub/station/general/sitelog_instr.txt 0. Form Prepared by (full name) : Susan Jeffries Date Prepared : 2019-04-02 Report Type : UPDATE If Update: Previous Site Log : lows_20130917.log Modified/Added Sections : (n.n,n.n,...) 1. Site Identification of the GNSS Monument Site Name : LOWS_SCGN_CN2001 Four Character ID : LOWS Monument Inscription : LOWS 2001 IERS DOMES Number : 49609M001 CDP Number : Monument Description : Wyatt/Agnew drilled-braced Height of the Monument : (m) Monument Foundation : (STEEL RODS/CONCRETE BLOCK/ROOF/etc) Foundation Depth : (m) Marker Description : Drilled hole in top of center support bolt of : antenna adaptor Date Installed : 2001-08-03 Geologic Characteristic : Bedrock Bedrock Type : Sedimentary Bedrock Condition : Highly weathered Fracture Spacing : (1-10 cm/10-50 cm/50-200 cm/over 200 cm) Fault zones nearby : (YES/NO/Name of the zone) Distance/activity : (multiple lines) Additional Information : SCIGN - Southern California Integrated GPS : Network A secondary measurement, the : adaptor/divot distance, taken from the bottom of : the lower adaptor plate to the center of a divot : drill-mark on the north-facing tripod leg, is : 0.0112m. 2. Site Location Information City or Town : Parkfield State or Province : California Country : USA Tectonic Plate : Pacific Approximate Position (ITRF) X coordinate (m) : -2635114.5876 Y coordinate (m) : -4456750.304 Z coordinate (m) : 3713049.7431 Latitude (N is +) : +354943.35 Longitude (E is +) : -1203539.42 Elevation (m,ellips.) : 428.6658 Additional Information : Monterey County. Reference frame used is : (ITRF2000). Coordinate system used is (WGS84). 3. GNSS Receiver Information 3.1 Receiver Type : ASHTECH Z-XII3 Satellite System : GPS Serial Number : LP02645 Firmware Version : CD00 Elevation Cutoff Setting : 10 deg Date Installed : 2001-08-03T00:00Z Date Removed : 2003-07-12T02:35Z Temperature Stabiliz. : none Additional Information : Initial installation. 3.2 Receiver Type : ASHTECH Z-XII3 Satellite System : GPS Serial Number : LP02645 Firmware Version : CD00 Elevation Cutoff Setting : 0 deg Date Installed : 2003-07-12T02:35Z Date Removed : 2007-11-11T22:57Z Temperature Stabiliz. : none Additional Information : Sampling interval increased from 30 seconds to 1 : hertz for inclusion in Parkfield realtime : network. 3.3 Receiver Type : TRIMBLE NETRS Satellite System : GPS Serial Number : 4611206643 Firmware Version : 1.1-2 Elevation Cutoff Setting : 0 deg Date Installed : 2007-11-11T22:57Z Date Removed : 2010-07-01T11:04Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.4 Receiver Type : TRIMBLE NETRS Satellite System : GPS Serial Number : 4611206643 Firmware Version : 1.3-0 Elevation Cutoff Setting : 0 deg Date Installed : 2010-07-01T11:04Z Date Removed : 2019-03-29T22:31Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.5 Receiver Type : TRIMBLE NETRS Satellite System : GPS Serial Number : 4611206643 Firmware Version : 1.3-2 Elevation Cutoff Setting : deg Date Installed : 2019-03-29T22:31Z Date Removed : (CCYY-MM-DDThh:mmZ) Temperature Stabiliz. : none Additional Information : (multiple lines) 3.x Receiver Type : (A20, from rcvr_ant.tab; see instructions) Satellite System : (GPS+GLO+GAL+BDS+QZSS+SBAS) Serial Number : (A20, but note the first A5 is used in SINEX) Firmware Version : (A11) Elevation Cutoff Setting : (deg) Date Installed : (CCYY-MM-DDThh:mmZ) Date Removed : (CCYY-MM-DDThh:mmZ) Temperature Stabiliz. : (none or tolerance in degrees C) Additional Information : (multiple lines) 4. GNSS Antenna Information 4.1 Antenna Type : ASH701945B_M SCIT Serial Number : CR519991881 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0083 Marker->ARP North Ecc(m) : 0 Marker->ARP East Ecc(m) : 0 Alignment from True N : deg Antenna Radome Type : SCIT Radome Serial Number : 211 Antenna Cable Type : (vendor & type number) Antenna Cable Length : (m) Date Installed : 2001-08-03T00:00Z Date Removed : (CCYY-MM-DDThh:mmZ) Additional Information : 4.x Antenna Type : (A20, from rcvr_ant.tab; see instructions) Serial Number : (A*, but note the first A5 is used in SINEX) Antenna Reference Point : (BPA/BCR/XXX from "antenna.gra"; see instr.) Marker->ARP Up Ecc. (m) : (F8.4) Marker->ARP North Ecc(m) : (F8.4) Marker->ARP East Ecc(m) : (F8.4) Alignment from True N : (deg; + is clockwise/east) Antenna Radome Type : (A4 from rcvr_ant.tab; see instructions) Radome Serial Number : Antenna Cable Type : (vendor & type number) Antenna Cable Length : (m) Date Installed : (CCYY-MM-DDThh:mmZ) Date Removed : (CCYY-MM-DDThh:mmZ) Additional Information : (multiple lines) 5. Surveyed Local Ties 5.x Tied Marker Name : Tied Marker Usage : (SLR/VLBI/LOCAL CONTROL/FOOTPRINT/etc) Tied Marker CDP Number : (A4) Tied Marker DOMES Number : (A9) Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : (m) dy (m) : (m) dz (m) : (m) Accuracy (mm) : (mm) Survey method : (GPS CAMPAIGN/TRILATERATION/TRIANGULATION/etc) Date Measured : (CCYY-MM-DDThh:mmZ) Additional Information : (multiple lines) 6. Frequency Standard 6.1 Standard Type : Input Frequency : Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 6.x Standard Type : (INTERNAL or EXTERNAL H-MASER/CESIUM/etc) Input Frequency : (if external) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 7. Collocation Information 7.1 Instrumentation Type : NONE Status : (PERMANENT/MOBILE) Effective Dates : (CCYY-MM-DDThh:mmZ) Notes : (multiple lines) 7.x Instrumentation Type : (GPS/GLONASS/DORIS/PRARE/SLR/VLBI/TIME/etc) Status : (PERMANENT/MOBILE) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8. Meteorological Instrumentation 8.1.x Humidity Sensor Model : Manufacturer : Serial Number : Data Sampling Interval : (sec) Accuracy (% rel h) : (% rel h) Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.2.x Pressure Sensor Model : Manufacturer : Serial Number : Data Sampling Interval : (sec) Accuracy : (hPa) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.3.x Temp. Sensor Model : Manufacturer : Serial Number : Data Sampling Interval : (sec) Accuracy : (deg C) Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.4.x Water Vapor Radiometer : Manufacturer : Serial Number : Distance to Antenna : (m) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.5.x Other Instrumentation : (multiple lines) 9. Local Ongoing Conditions Possibly Affecting Computed Position 9.1.x Radio Interferences : (TV/CELL PHONE ANTENNA/RADAR/etc) Observed Degradations : (SN RATIO/DATA GAPS/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 9.2.x Multipath Sources : (METAL ROOF/DOME/VLBI ANTENNA/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 9.3.x Signal Obstructions : (TREES/BUILDINGS/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 10. Local Episodic Effects Possibly Affecting Data Quality 10.x Date : (CCYY-MM-DD/CCYY-MM-DD) Event : (TREE CLEARING/CONSTRUCTION/etc) 11. On-Site, Point of Contact Agency Information Agency : UNAVCO Preferred Abbreviation : UNAVCO Mailing Address : UNAVCO 6350 Nautilus Dr : Boulder CO USA 80301 Primary Contact Contact Name : Karl Feaux Telephone (primary) : 303-381-7556 Telephone (secondary) : Fax : 303-381-7552 E-mail : feaux@unavco.org Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : (multiple lines) 12. Responsible Agency (if different from 11.) Agency : Preferred Abbreviation : Mailing Address : 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) 13. More Information Primary Data Center : UNAVCO Boulder Facility Archive Secondary Data Center : URL for More Information : http://www.unavco.org Hardcopy on File Site Map : (Y or URL) Site Diagram : (Y or URL) Horizon Mask : (Y or URL) Monument Description : (Y or URL) Site Pictures : (Y or URL) Additional Information : (multiple lines) Antenna Graphics with Dimensions ASH701945B_M ASH701945C_M ASH701945D_M ASH701945E_M +-------+ / + \ <-- 0.1280 L2 | + | <-- 0.1100 L1 +-----------------+-------------+------------------+ <-- 0.1006 TCR | | | | | | | | +-+--------------------------------------------------+-+ <-- 0.0376 +-------------------+-------------+--------------------+ <-- 0.0346 BCR | | | | +------x------+ <-- 0.0000 BPA=ARP <-- 0.3794 --> 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 TOP: Top of Pole