DAM2 Site Information Form (site log) International GNSS Service See Instructions at: https://files.igs.org/pub/station/general/sitelog_instr.txt 0. Form Prepared by (full name) : Ryan Turner Date Prepared : 2024-10-03 Report Type : UPDATE If Update: Previous Site Log : dam2_20231208.log Modified/Added Sections : 1. Site Identification of the GNSS Monument Site Name : Pacoima Dam 2 Four Character ID : DAM2 Monument Inscription : IERS DOMES Number : 49905M002 CDP Number : Monument Description : pillar Height of the Monument : Monument Foundation : CONCRETE BLOCK Foundation Depth : Marker Description : Machined top surface of a pier built by L.A. Date Installed : 1995-08-23T00:00Z Geologic Characteristic : Bedrock Type : Bedrock Condition : Fracture Spacing : Fault zones nearby : Distance/activity : Additional Information : Antenna is attached to top of a specially built : pier that is approx. 2 m tall so as to put the : the antenna above height of the chain link : fencing that runs the length of the dam crest. : SCIGN - Southern California Integrated GPS : Network 2. Site Location Information City or Town : Pacoima State or Province : California Country : USA Tectonic Plate : Pacific Approximate Position (ITRF) X coordinate (m) : -2507656.1718 Y coordinate (m) : -4638419.0837 Z coordinate (m) : 3577506.8116 Latitude (N is +) : +342005.41 Longitude (E is +) : -1182348.72 Elevation (m,ellips.) : 583.4000 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 : 00225 Firmware Version : NAV 1E24 CHN 1C70 Elevation Cutoff Setting : 0 deg Date Installed : 1995-08-23T00:00Z Date Removed : 1996-09-06T00:00Z Temperature Stabiliz. : Additional Information : First Measurements. (Owned by L.A. County Survey : Division) 3.2 Receiver Type : ASHTECH Z-XII3 Satellite System : GPS Serial Number : 00225 Firmware Version : NAV 1E95 1D01 Elevation Cutoff Setting : 0 deg Date Installed : 1996-09-06T00:00Z Date Removed : 1998-04-10T00:00Z Temperature Stabiliz. : Additional Information : Configuration Change: Firmware upgrade. (Owned : by L.A. County Survey Division) 3.3 Receiver Type : ASHTECH Z-XII3 Satellite System : GPS Serial Number : LP03254 Firmware Version : 1F50 Elevation Cutoff Setting : 0 deg Date Installed : 1998-04-10T00:00Z Date Removed : 1999-06-10T18:58Z Temperature Stabiliz. : Additional Information : ASHTECH LP Z-XII 700845-10(F) receiver Paul : Jamason entered this listing based on jday : 100/1998 rinex header. 3.4 Receiver Type : ASHTECH Z-XII3 Satellite System : GPS Serial Number : LP03059 Firmware Version : CC00 Elevation Cutoff Setting : 10 deg Date Installed : 1999-06-10T18:58Z Date Removed : 2005-02-16T00:00Z Temperature Stabiliz. : Additional Information : Firmware upgrade for GPS week rollover : compliance 3.5 Receiver Type : ASHTECH Z-XII3 Satellite System : GPS Serial Number : LP03212 Firmware Version : CD00 Elevation Cutoff Setting : 10 deg Date Installed : 2005-02-16T00:00Z Date Removed : 2012-10-10T17:56Z Temperature Stabiliz. : Additional Information : 3.6 Receiver Type : TPS NET-G3A Satellite System : GPS Serial Number : 618-01087 Firmware Version : 3.6 Feb28,2012p1 Elevation Cutoff Setting : 5 deg Date Installed : 2012-10-10T18:06Z Date Removed : 2013-06-11T18:58Z Temperature Stabiliz. : Additional Information : 3.7 Receiver Type : TPS NET-G3A Satellite System : GPS Serial Number : 618-01087 Firmware Version : 4.0 Dec,21,2012 p1 Elevation Cutoff Setting : 5 deg Date Installed : 2013-06-11T19:14Z Date Removed : 2015-04-28T02:00Z Temperature Stabiliz. : Additional Information : 3.8 Receiver Type : TPS NET-G3A Satellite System : GPS+GLO Serial Number : 618-01087 Firmware Version : 4.0 Dec,21,2012 p1 Elevation Cutoff Setting : 5 deg Date Installed : 2015-04-28T02:00Z Date Removed : 2015-11-17T18:44Z Temperature Stabiliz. : Additional Information : Configuration Change: GLONASS turned on. 3.9 Receiver Type : TPS NET-G3A Satellite System : GPS+GLO Serial Number : 618-01087 Firmware Version : 4.5 Dec,29,2014 Elevation Cutoff Setting : 5 deg Date Installed : 2015-11-17T18:49Z Date Removed : 2017-02-10T23:50Z Temperature Stabiliz. : Additional Information : 3.10 Receiver Type : TPS NET-G3A Satellite System : GPS Serial Number : 618-01087 Firmware Version : 4.7 Oct,18,2016 p2 Elevation Cutoff Setting : 5 deg Date Installed : 2017-02-11T00:10Z Date Removed : 2019-04-01T23:27Z Temperature Stabiliz. : Additional Information : 3.11 Receiver Type : TPS NET-G3A Satellite System : GPS Serial Number : 618-01087 Firmware Version : 4.7 Feb,21,2019 p10 Elevation Cutoff Setting : 5 deg Date Installed : 2019-04-01T23:39Z Date Removed : 2023-12-07T19:03Z Temperature Stabiliz. : Additional Information : 3.12 Receiver Type : SEPT POLARX5 Satellite System : GPS+GLO+GAL+SBAS Serial Number : 3052386 Firmware Version : 5.4.0 Elevation Cutoff Setting : 0 deg Date Installed : 2023-12-07T19:03Z Date Removed : (CCYY-MM-DDThh:mmZ) Temperature Stabiliz. : Additional Information : 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 : ASH700936A_M NONE Serial Number : 11495 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0400 Marker->ARP North Ecc(m) : 0 Marker->ARP East Ecc(m) : 0 Alignment from True N : Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : Antenna Cable Length : Date Installed : 1995-08-23T00:00Z Date Removed : 1996-10-23T00:00Z Additional Information : Vertical datum is the the machined top surface : of a pier that was built by LA County - they use : top surface of monumnet in dam surface as their : own vertical datum. (not yet measured) ASHTECH : Model 700936-A (Metal Choke Ring) Owned by L.A. : County Survey Division 4.2 Antenna Type : ASH700936A_M SNOW Serial Number : 13539 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0400 Marker->ARP North Ecc(m) : 0 Marker->ARP East Ecc(m) : 0 Alignment from True N : Antenna Radome Type : SNOW Radome Serial Number : Antenna Cable Type : Antenna Cable Length : Date Installed : 1996-10-23T00:00Z Date Removed : 2012-10-10T18:18Z Additional Information : Antenna swapped preamp overloaded on previous : antenna. ASHTECH Model 700936-A (Metal Choke : Ring) Owned by L.A. County Survey Division 4.3 Antenna Type : TPSCR.G3 SCIS Serial Number : 383-1764 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0400 Marker->ARP North Ecc(m) : 0 Marker->ARP East Ecc(m) : 0 Alignment from True N : Antenna Radome Type : SCIS Radome Serial Number : Antenna Cable Type : Antenna Cable Length : Date Installed : 2012-10-10T18:26Z Date Removed : 2023-12-07T19:03Z Additional Information : 4.4 Antenna Type : TWIVC6050 SCIS Serial Number : VC6150L1907310001 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0385 Marker->ARP North Ecc(m) : 0 Marker->ARP East Ecc(m) : 0 Alignment from True N : Antenna Radome Type : SCIS Radome Serial Number : 2705 Antenna Cable Type : Antenna Cable Length : Date Installed : 2023-12-07T19:03Z 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 : INTERNAL Input Frequency : Effective Dates : 1995-08-23/CCYY-MM-DD Notes : 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.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 Southern California Geodetic Network Preferred Abbreviation : SCGN Mailing Address : 525 South Wilson Avenue. Pasadena, CA 91106 Primary Contact Contact Name : USGS SCGN Operators Telephone (primary) : 650-329-4677 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 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 : Antenna Graphics with Dimensions https://files.igs.org/pub/station/general/antenna.gra