SNI100USA Site Information Form (site log) International GNSS Service See Instructions at: https://ftp.igs.org/pub/station/general/sitelog_instr.txt 0. Form Prepared by (full name) : David Maggert Date Prepared : 2021-08-25 Report Type : UPDATE If Update: Previous Site Log : sni1_20190529.log Modified/Added Sections : 2, 11 1. Site Identification of the GNSS Monument Site Name : San Nicolas Island Four Character ID : SNI1 Monument Inscription : 4507-S IERS DOMES Number : 49909S001 CDP Number : Monument Description : Pillar Height of the Monument : Monument Foundation : Concrete Block Foundation Depth : Marker Description : Date Installed : 1995-11-21T00:00Z Geologic Characteristic : BEDROCK Bedrock Type : SEDIMENTARY Bedrock Condition : Fracture Spacing : Fault zones nearby : Distance/activity : Additional Information : SCIGN - Southern California Integrated GPS : Network. 2. Site Location Information City or Town : San Nicolas Island State or Province : California Country : United States of America (the) Tectonic Plate : PACIFIC Approximate Position (ITRF) X coordinate (m) : -2631346.8232 Y coordinate (m) : -4646278.7114 Z coordinate (m) : 3477113.3756 Latitude (N is +) : +331452.35 Longitude (E is +) : -1193127.71 Elevation (m,ellips.) : 239.67 Additional Information : Ventura County. 3. GNSS Receiver Information 3.1 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : T-326 Firmware Version : 3.2 link 03/09/95 Elevation Cutoff Setting : Date Installed : 1995-11-21T00:00Z Date Removed : 1996-07-10T00:00Z Temperature Stabiliz. : Additional Information : 3.2 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : T-104 Firmware Version : 3.2 link 03/09/95 Elevation Cutoff Setting : Date Installed : 1996-07-10T00:00Z Date Removed : 1998-08-18T00:00Z Temperature Stabiliz. : Additional Information : 3.3 Receiver Type : ASHTECH Z-XII3 Satellite System : GPS Serial Number : LP03099 Firmware Version : 1F50 Elevation Cutoff Setting : Date Installed : 1998-08-18T00:00Z Date Removed : 1999-08-25T00:00Z Temperature Stabiliz. : Additional Information : Replaces faulty TurboRogue receiver. 3.4 Receiver Type : ASHTECH Z-XII3 Satellite System : GPS Serial Number : LP02785 Firmware Version : CC00 Elevation Cutoff Setting : 10 deg Date Installed : 1999-08-25T00:00Z Date Removed : 2011-01-25T19:15Z Temperature Stabiliz. : Additional Information : Firmware upgrade for GPS week : rollover-compliance. 3.5 Receiver Type : TRIMBLE NETRS Satellite System : GPS Serial Number : 4811147000 Firmware Version : 1.1-2 Elevation Cutoff Setting : 0 deg Date Installed : 2011-01-25T19:33Z Date Removed : 2012-12-10T21:04Z Temperature Stabiliz. : Additional Information : 3.6 Receiver Type : TPS NET-G3A Satellite System : GPS Serial Number : 618-01118 Firmware Version : 3.6 Feb,28,2012 p1 Elevation Cutoff Setting : 5 deg Date Installed : 2012-12-10T21:04Z Date Removed : 2013-06-05T17:18Z Temperature Stabiliz. : Additional Information : 3.7 Receiver Type : TPS NET-G3A Satellite System : GPS Serial Number : 618-01118 Firmware Version : 4.0 Dec,21,2012 p1 Elevation Cutoff Setting : 5 deg Date Installed : 2013-06-05T17:58Z Date Removed : 2015-11-18T21:17Z Temperature Stabiliz. : Additional Information : 3.8 Receiver Type : TPS NET-G3A Satellite System : GPS+GLO Serial Number : 618-01118 Firmware Version : 4.5 Dec,29,2014 Elevation Cutoff Setting : 5 deg Date Installed : 2015-11-18T21:22Z Date Removed : 2016-02-09T22:57Z Temperature Stabiliz. : Additional Information : 3.9 Receiver Type : TPS NET-G3A Satellite System : GPS Serial Number : 618-01118 Firmware Version : 4.5 Dec,29,2014 Elevation Cutoff Setting : 5 deg Date Installed : 2016-02-09T22:57Z Date Removed : 2017-02-13T22:41Z Temperature Stabiliz. : Additional Information : GLONASS disabled 3.10 Receiver Type : TPS NET-G3A Satellite System : GPS Serial Number : 618-01118 Firmware Version : 4.7 Oct,18,2016 p2 Elevation Cutoff Setting : 5 deg Date Installed : 2017-02-13T22:41Z Date Removed : 2019-03-27T19:58Z Temperature Stabiliz. : Additional Information : 3.11 Receiver Type : TPS NET-G3A Satellite System : GPS+GLO Serial Number : 618-01118 Firmware Version : 4.7 Feb,21,2019 p10 Elevation Cutoff Setting : 5 deg Date Installed : 2019-03-27T20:04Z 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 : AOAD/M_T NONE Serial Number : 487 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0000 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : Antenna Cable Length : Date Installed : 1995-11-21T00:00Z Date Removed : 1998-08-18T00:00Z Additional Information : 4.2 Antenna Type : ASH700936E_C NONE Serial Number : CR14693 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0000 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : Antenna Cable Length : Date Installed : 1998-08-18T00:00Z Date Removed : 2000-12-19T00:00Z Additional Information : Replaces faulty TurboRogue antenna. No : SCIGN adaptor installed, geodetic reference : point remains the same. Paul Jamason corrected : this entry (was 0.0083 m) on 09-NOV-1998 : ASHTECH Choke Ring 700936-02 Rev: E 4.3 Antenna Type : ASH701945B_M SCIS Serial Number : CR519991925 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0000 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : Antenna Radome Type : SCIS Radome Serial Number : 0096 Antenna Cable Type : Antenna Cable Length : Date Installed : 2000-12-19T00:00Z Date Removed : 2017-08-08T16:47Z Additional Information : Replaces Ashtech cast antenna. No : SCIGN adaptor installed, geodetic reference : point remains the same. Short dome added. : this entry (was 0.0083 m) on 09-NOV-1998 : ASHTECH Choke Ring 700936-02 Rev: E 4.4 Antenna Type : TPSCR.G3 SCIS Serial Number : 383-1866 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0000 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : SCIS Radome Serial Number : 0096 Antenna Cable Type : Antenna Cable Length : Date Installed : 2017-08-08T17:52Z 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 : 1995-11-21/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 7.1 Instrumentation Type : Other Status : Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : Terascope Seismic Sensor 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. 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 : 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 : 13. More Information Primary Data Center : CDDIS Secondary Data Center : IGN URL for More Information : http://www.unavco.org Hardcopy on File Site Map : Site Diagram : Horizon Mask : Monument Description : Site Pictures : Additional Information : Antenna Graphics with Dimensions TPSCR.G3 +-------+ / \ | | +-----------------+-------------+-----------------+ <-- 0.1015 TCR | | | | | | | | +-+-------------------------------------------------+-+ +-------------------+-------------+-------------------+ <-- 0.0345 BCR | | | | +------x------+ <-- 0.0000 BPA=ARP NOM=NRP <-- 0.2380 --> <-- 0.3800 -->