SNI100USA Site Information Form (site log)
     International GNSS Service
     See Instructions at:
       https://files.igs.org/pub/station/general/sitelog_instr_v2.0.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
     Nine Character ID        : SNI100USA
     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 or Region        : USA
     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.)  : 239.7
     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                   : (multiple lines)
     Preferred Abbreviation   : (A10)
     Mailing Address          : (multiple lines)
     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      : 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                     -->