CHIL 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            : 2024-11-20
     Report Type              : UPDATE
     If Update:
      Previous Site Log       : chil_20241003.log
      Modified/Added Sections : 3.16 Corrected extraneous "+" in "Satellite
                              : System" 


1.   Site Identification of the GNSS Monument

     Site Name                : Chilao
     Four Character ID        : CHIL
     Monument Inscription     : 
     IERS DOMES Number        : 40484M001
     CDP Number               : 
     Monument Description     : rock-pin/metal-tripod
       Height of the Monument : 
       Monument Foundation    : 
       Foundation Depth       : 
     Marker Description       : filed notch on vertical rod
     Date Installed           : 1994-09-02T00:00Z
     Geologic Characteristic  : BEDROCK
       Bedrock Type           : IGNEOUS
       Bedrock Condition      : SLIGHTLY WEATHERED, JOINTED
       Fracture Spacing       : over 200 cm
       Fault zones nearby     : 
         Distance/activity    : 
     Additional Information   : four 3/4 in. diameter stainless steel rods in a
                              : tripod-with-vertical-rod configuration, angled
                              : rods converge at ~1.2m above ground, central rod
                              : extends above junction:


2.   Site Location Information

     City or Town             : San Gabriel Mountains
     State or Province        : California
     Country                  : USA
     Tectonic Plate           : PACIFIC
     Approximate Position (ITRF)
       X coordinate (m)       : -2478003.1200
       Y coordinate (m)       : -4655349.2200
       Z coordinate (m)       : 3577932.2000
       Latitude (N is +)      : +342000.32
       Longitude (E is +)     : -1180133.59
       Elevation (m,ellips.)  : 1567.5100
     Additional Information   : Los Angeles County.


3.   GNSS Receiver Information

3.1  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 03460
     Firmware Version         : 1D00
     Elevation Cutoff Setting : 
     Date Installed           : 1994-09-02T00:00Z
     Date Removed             : 1995-04-06T00:00Z
     Temperature Stabiliz.    : 
     Additional Information   : Initial measurements.

3.2  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 04538
     Firmware Version         : 1E24
     Elevation Cutoff Setting : 
     Date Installed           : 1995-04-06T00:00Z
     Date Removed             : 1995-04-13T00:00Z
     Temperature Stabiliz.    : 
     Additional Information   : Receiver swap and firmware upgrade.

3.3  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 04356
     Firmware Version         : 1E24
     Elevation Cutoff Setting : 
     Date Installed           : 1995-04-13T00:00Z
     Date Removed             : 1996-09-25T00:00Z
     Temperature Stabiliz.    : 
     Additional Information   : Receiver swap.

3.4  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 04356
     Firmware Version         : 1E95
     Elevation Cutoff Setting : 
     Date Installed           : 1996-09-25T00:00Z
     Date Removed             : 1997-11-20T00:00Z
     Temperature Stabiliz.    : 
     Additional Information   : Configuration Change: Firmware upgrade.

3.5  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 03012
     Firmware Version         : 1F50
     Elevation Cutoff Setting : 
     Date Installed           : 1997-11-20T00:00Z
     Date Removed             : 1999-06-22T22:25Z
     Temperature Stabiliz.    : 
     Additional Information   : Receiver swap and firmware upgrade.

3.6  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : LP02743
     Firmware Version         : CC00
     Elevation Cutoff Setting : 10 deg
     Date Installed           : 1999-06-22T22:25Z
     Date Removed             : 2002-06-08T00:00Z
     Temperature Stabiliz.    : 
     Additional Information   : Receiver swap and firmware upgrade for GPS week
                              : rollover-compliance.

3.7  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : LP02743
     Firmware Version         : CC00
     Elevation Cutoff Setting : 10 deg
     Date Installed           : 2002-06-08T00:00Z
     Date Removed             : 2007-12-12T00:00Z
     Temperature Stabiliz.    : 
     Additional Information   : Configuration Change: Sampling interval
                              : increased to 5 seconds. Raw data stored
                              : permanently. Rinex data decimated to 30 seconds.

3.8  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : LP02657
     Firmware Version         : CC00
     Elevation Cutoff Setting : 
     Date Installed           : 2007-12-12T00:00Z
     Date Removed             : 2012-05-08T18:00Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.9  Receiver Type            : TPS NET-G3A
     Satellite System         : GPS
     Serial Number            : 618-01102
     Firmware Version         : 3.6 Feb,28,2012 p1
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2012-05-08T19:10Z
     Date Removed             : 2013-05-23T22:00Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.10 Receiver Type            : TPS NET-G3A
     Satellite System         : GPS
     Serial Number            : 618-01102
     Firmware Version         : 4.0 Dec,21,2012 p1
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2013-05-23T22:00Z
     Date Removed             : 2015-04-27T23:00Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.11 Receiver Type            : TPS NET-G3A
     Satellite System         : GPS+GLO
     Serial Number            : 618-01102
     Firmware Version         : 4.0 Dec,21,2012 p1
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2015-04-27T23:00Z
     Date Removed             : 2015-11-14T02:29Z
     Temperature Stabiliz.    : 
     Additional Information   : Configuration Change: GLONASS enabled

3.12 Receiver Type            : TPS NET-G3A
     Satellite System         : GPS+GLO
     Serial Number            : 618-01102
     Firmware Version         : 4.5 Dec,29,2014
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2015-11-14T02:36Z
     Date Removed             : 2016-02-09T22:04Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.13 Receiver Type            : TPS NET-G3A
     Satellite System         : GPS
     Serial Number            : 618-01102
     Firmware Version         : 4.5 Dec,29,2014
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2016-02-09T22:04Z
     Date Removed             : 2017-02-10T23:54Z
     Temperature Stabiliz.    : 
     Additional Information   : Configuration Change: GLONASS disabled

3.14 Receiver Type            : TPS NET-G3A
     Satellite System         : GPS
     Serial Number            : 618-01102
     Firmware Version         : 4.7 Oct,18,2016 p2
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2017-02-11T00:02Z
     Date Removed             : 2019-03-25T19:36Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.15 Receiver Type            : TPS NET-G3A
     Satellite System         : GPS+GLO
     Serial Number            : 618-01102
     Firmware Version         : 4.7 Feb,21,2019 p10
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2019-03-25T19:45Z
     Date Removed             : 2024-08-28T19:35Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.16 Receiver Type            : SEPT POLARX5
     Satellite System         : GPS+GLO+GAL+SBAS
     Serial Number            : 3062054
     Firmware Version         : 5.4.0
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2024-08-28T19:35Z
     Date Removed             : (CCYY-MM-DDThh:mmZ)
     Temperature Stabiliz.    : 
     Additional Information   : Upgrade

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             : ASH700718B      NONE
     Serial Number            : 10334
     Antenna Reference Point  : BPA
     Marker->ARP Up Ecc. (m)  : 0.6440
     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           : 1994-09-02T00:00Z
     Date Removed             : 1995-04-06T00:00Z
     Additional Information   : In field measured 66.0 cm to wide part of pre-
                              : amp and corrected by subtracting 1.60 cm.
                              : SOPAC's older logs for this site stated 0.0644 m
                              : which was off by a factor of 10x (unit

4.2  Antenna Type             : ASH700718B      NONE
     Serial Number            : 10859
     Antenna Reference Point  : BPA
     Marker->ARP Up Ecc. (m)  : 0.6440
     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           : 1995-04-06T00:00Z
     Date Removed             : 1995-05-30T00:00Z
     Additional Information   : In field measured both to base of narrow part
                              : wide part 0.660 m (a difference of 1.60 cm)

4.3  Antenna Type             : ASH700936A_M    SCPL
     Serial Number            : 11497
     Antenna Reference Point  : BPA
     Marker->ARP Up Ecc. (m)  : 0.6440
     Marker->ARP North Ecc(m) : 0.0000
     Marker->ARP East Ecc(m)  : 0.0000
     Alignment from True N    : 
     Antenna Radome Type      : SCPL
     Radome Serial Number     : 
     Antenna Cable Type       : 
     Antenna Cable Length     : 
     Date Installed           : 1995-05-30T00:00Z
     Date Removed             : 2012-05-08T18:00Z
     Additional Information   : Same filed notch used as vertical datum. No
                              : field log was written when DM antenna was
                              : emplaced.

4.4  Antenna Type             : TPSCR.G3        SCPL
     Serial Number            : 383-1822
     Antenna Reference Point  : BPA
     Marker->ARP Up Ecc. (m)  : 0.6440
     Marker->ARP North Ecc(m) : 0.0000
     Marker->ARP East Ecc(m)  : 0.0000
     Alignment from True N    : 0
     Antenna Radome Type      : SCPL
     Radome Serial Number     : 
     Antenna Cable Type       : 
     Antenna Cable Length     : 
     Date Installed           : 2012-05-08T19:10Z
     Date Removed             : 2024-08-28T19:35Z
     Additional Information   : 

4.5  Antenna Type             : TWIVC6050       SCPL
     Serial Number            : VC6150L1908270020
     Antenna Reference Point  : BPA
     Marker->ARP Up Ecc. (m)  : 0.644
     Marker->ARP North Ecc(m) : 0
     Marker->ARP East Ecc(m)  : 0
     Alignment from True N    : 0
     Antenna Radome Type      : SCPL
     Radome Serial Number     : 
     Antenna Cable Type       : 
     Antenna Cable Length     : 
     Date Installed           : 2024-08-28T19:35Z
     Date Removed             : (CCYY-MM-DDThh:mmZ)
     Additional Information   : Upgrade

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        : 1994-09-02/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      : CDDIS
     Secondary Data Center    : IGN
     URL for More Information : https://cddis.nasa.gov/
     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