DYHS Site Information Form (site log) International GPS Service See Instructions at: https://ftp.igs.org/pub/station/general/sitelog_instr.txt 0. Form Prepared by (full name) : Susan Jeffries Date Prepared : 2022-04-05 Report Type : UPDATE If Update: Previous Site Log : dyhs_20140711.log Modified/Added Sections : (n.n,n.n,...) 1. Site Identification of the GNSS Monument Site Name : Downey H.S. Four Character ID : DYHS Monument Inscription : DYHS IERS DOMES Number : 49922M001 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 : Top of center support screw on SCIGN D3 antenna : adaptor Date Installed : 1998-05-26 Geologic Characteristic : ALLUVIAL SILT AND SAND Bedrock Type : N/A Bedrock Condition : N/A Fracture Spacing : N/A Fault zones nearby : (YES/NO/Name of the zone) Distance/activity : (multiple lines) Additional Information : SCIGN - Southern California Integrated GPS : Network. Monument is Wyatt-type drilled-braced : Geodetic Monument composed of stainless steel : supports and new SCIGN antenna adaptor. Fixed : antenna height is 0.0083 m. 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 not yet measured. 2. Site Location Information City or Town : Downey State or Province : California Country : USA Tectonic Plate : Pacific Approximate Position (ITRF) X coordinate (m) : -2497117.221 Y coordinate (m) : -4671584.7441 Z coordinate (m) : 3540742.8961 Latitude (N is +) : +335616.76 Longitude (E is +) : -1180733.54 Elevation (m,ellips.) : 1.506 Additional Information : Los Angeles 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 : LP03045 Firmware Version : 1F50 Elevation Cutoff Setting : 10 deg Date Installed : 1998-07-15T00:00Z Date Removed : 1999-06-16T18:42Z Temperature Stabiliz. : Additional Information : Initial measurements. 3.2 Receiver Type : ASHTECH Z-XII3 Satellite System : GPS Serial Number : LP02664 Firmware Version : CC00 Elevation Cutoff Setting : 10 deg Date Installed : 1999-06-16T18:42Z Date Removed : 2009-09-16T19:50Z Temperature Stabiliz. : Additional Information : Firmware upgrade for GPS week : rollover-compliance. 3.3 Receiver Type : ASHTECH Z-XII3 Satellite System : GPS Serial Number : LP02582 Firmware Version : CD00 Elevation Cutoff Setting : 0 deg Date Installed : 2009-09-16T19:55Z Date Removed : 2011-04-13T23:35Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.4 Receiver Type : TPS NET-G3A Satellite System : GPS Serial Number : 618-01049 Firmware Version : 3.5 May 06,2010 Elevation Cutoff Setting : 5 deg Date Installed : 2011-04-13T23:59Z Date Removed : 2011-08-23T23:59Z 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 : ASH700936E_C NONE Serial Number : CR14814 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 : NONE Radome Serial Number : Antenna Cable Type : (vendor & type number) Antenna Cable Length : (m) Date Installed : 1998-07-15T00:00Z Date Removed : 1999-07-20T00:00Z Additional Information : Antenna height is fixed and measured from the : raised nipple on the lower part of the antenna : adaptor (peak of center support screw) to the : BPA. 4.2 Antenna Type : ASH701945B_M SCIT Serial Number : CR519991775 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 : 0244 Antenna Cable Type : (vendor & type number) Antenna Cable Length : (m) Date Installed : 1999-07-20T00:00Z Date Removed : 2005-03-03T00:00Z Additional Information : New watertight Ashtech antenna. 4.3 Antenna Type : ASH701945B_M SCIT Serial Number : CR519991785 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 : 0244 Antenna Cable Type : (vendor & type number) Antenna Cable Length : (m) Date Installed : 2005-03-03T00:00Z Date Removed : 2011-08-23T23:59Z Additional Information : Time series is not consistant. Replaced 1775 : with 1785. 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 : INTERNAL Input Frequency : Effective Dates : 1998-07-15/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 : USGS Preferred Abbreviation : USGS Mailing Address : USGS Pasadena Field Office : 525 South Wilson Avenue : : Pasadena CA USA 91107 Primary Contact Contact Name : SCGN Operators Telephone (primary) : Telephone (secondary) : Fax : E-mail : scgn-operators@usgs.gov 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 : https://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