SSIA00SLV 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            : 2020-01-27
     Report Type              : UPDATE
     If Update:
      Previous Site Log       : ssia_20190610.log
      Modified/Added Sections : 3.12, 3.13


1.   Site Identification of the GNSS Monument

     Site Name                : Ilopango Airport
     Nine Character ID        : SSIA00SLV
     Monument Inscription     : 
     IERS DOMES Number        : 41401S001
     CDP Number               : none
     Monument Description     : building mount
       Height of the Monument : 
       Monument Foundation    : 
       Foundation Depth       : 
     Marker Description       : 
     Date Installed           : 2000-09-28T00:00Z
     Geologic Characteristic  : 
       Bedrock Type           : 
       Bedrock Condition      : 
       Fracture Spacing       : unknown
       Fault zones nearby     : 
         Distance/activity    : 
     Additional Information   : Re-assigned domes number on Oct. 10, 2000.


2.   Site Location Information

     City or Town             : San Salvador
     State or Province        : 
     Country or Region        : SLV
     Tectonic Plate           : CARIBBEAN
     Approximate Position (ITRF)
       X coordinate (m)       : 95610.0615
       Y coordinate (m)       : -6197817.1521
       Z coordinate (m)       : 1500617.9412
       Latitude (N is +)      : +134150.28
       Longitude (E is +)     : -0890658.32
       Elevation (m,ellips.)  : 664.4
     Additional Information   : 


3.   GNSS Receiver Information

3.1  Receiver Type            : TRIMBLE 4000SSI
     Satellite System         : GPS
     Serial Number            : 3937A26105
     Firmware Version         : 7.29
     Elevation Cutoff Setting : 
     Date Installed           : 2000-09-28T00:00Z
     Date Removed             : 2007-03-22T00:00Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.2  Receiver Type            : TRIMBLE NETRS
     Satellite System         : GPS
     Serial Number            : 4520250849
     Firmware Version         : 1.13
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2007-03-22T00:00Z
     Date Removed             : 2012-03-05T17:32Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.3  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS
     Serial Number            : 5133K77673
     Firmware Version         : 4.42
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2012-03-05T17:32Z
     Date Removed             : 2012-06-07T19:00Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.4  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS
     Serial Number            : 5133K77673
     Firmware Version         : 4.60
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2012-06-07T19:00Z
     Date Removed             : 2012-12-06T23:06Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.5  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS
     Serial Number            : 5133K77673
     Firmware Version         : 4.62
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2012-12-06T23:06Z
     Date Removed             : 2013-03-07T19:48Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.6  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS
     Serial Number            : 5133K77673
     Firmware Version         : 4.70
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2013-03-07T19:48Z
     Date Removed             : 2013-07-09T20:15Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.7  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS
     Serial Number            : 5133K77673
     Firmware Version         : 4.80
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2013-07-09T20:15Z
     Date Removed             : 2013-08-23T19:49Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.8  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS
     Serial Number            : 5133K77673
     Firmware Version         : 4.81
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2013-08-23T19:49Z
     Date Removed             : 2014-05-20T21:25Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.9  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS
     Serial Number            : 5133K77673
     Firmware Version         : 4.85
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2014-05-20T21:25Z
     Date Removed             : 2015-07-09T21:23Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.10 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS
     Serial Number            : 5133K77673
     Firmware Version         : 5.01
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2015-07-09T21:23Z
     Date Removed             : 2016-09-23T21:55Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.11 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS
     Serial Number            : 5133K77673
     Firmware Version         : 5.14
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2016-09-23T21:55Z
     Date Removed             : 2019-05-31T16:44Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.12 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS
     Serial Number            : 5041K71033
     Firmware Version         : 5.37
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2019-05-31T16:44Z
     Date Removed             : 2020-01-24T20:22Z
     Temperature Stabiliz.    : 
     Additional Information   : 

3.13 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL
     Serial Number            : 5041K71033
     Firmware Version         : 5.42
     Elevation Cutoff Setting : 10 deg
     Date Installed           : 2020-01-24T20:22Z
     Date Removed             : (CCYY-MM-DDThh:mmZ)
     Temperature Stabiliz.    : 
     Additional Information   : Also tracking BDS, but that requires RINEX3 
                              : which is not provided because the Trimble 
                              : RINEX3 converter does not provide the correct 
                              : antenna model number in drop down list.  
                              : Elevation cutoff found to be 10 degrees.  It 
                              : is not known how long the elevation cutoff has 
                              : been 10 degrees.  It is very likely previous 
                              : receiver entries have an elevation cutoff of 
                              : 10 degrees.

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             : TRM29659.00     UNAV
     Serial Number            : 0220191259
     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      : UNAV
     Radome Serial Number     : 
     Antenna Cable Type       : 
     Antenna Cable Length     : 
     Date Installed           : 2000-09-28T00:00Z
     Date Removed             : 2007-03-22T00:00Z
     Additional Information   : 

4.2  Antenna Type             : TRM29659.00     UNAV
     Serial Number            : 0220356936
     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      : UNAV
     Radome Serial Number     : 
     Antenna Cable Type       : 
     Antenna Cable Length     : 
     Date Installed           : 2007-03-22T00:00Z
     Date Removed             : 2019-05-31T16:44Z
     Additional Information   : 

4.3  Antenna Type             : TRM59800.80     SCIS
     Serial Number            : 4623A16423
     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     : 
     Antenna Cable Type       : 
     Antenna Cable Length     : 
     Date Installed           : 2019-05-31T16:44Z
     Date Removed             : (CCYY-MM-DDThh:mmZ)
     Additional Information   : new antenna and radome

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        : 2000-08-28/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

8.1.1 Humidity Sensor Model   : WXT520
       Manufacturer           : Vaisala
       Serial Number          : G3930003
       Data Sampling Interval : 15 sec
       Accuracy (% rel h)     : 
       Aspiration             : 
       Height Diff to Ant     : 1.5 m
       Calibration date       : 
       Effective Dates        : 2012-03-05/CCYY-MM-DD
       Notes                  : 

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)

8.2.1 Pressure Sensor Model   : WXT520
       Manufacturer           : Vaisala
       Serial Number          : G3930003
       Data Sampling Interval : 15 sec
       Accuracy               : 
       Height Diff to Ant     : 1.5 m
       Calibration date       : 
       Effective Dates        : 2012-03-05/CCYY-MM-DD
       Notes                  : 

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)

8.3.1 Temp. Sensor Model      : WXT520
       Manufacturer           : Vaisala
       Serial Number          : G3930003
       Data Sampling Interval : 15 sec
       Accuracy               : 
       Aspiration             : 
       Height Diff to Ant     : 1.5 m
       Calibration date       : 
       Effective Dates        : 2012-03-05/CCYY-MM-DD
       Notes                  : 

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                   : Centro Nacional de Registros
     Preferred Abbreviation   : CNR
     Mailing Address          : 1 Calle Pte. y 43 Av. Nte. #2310
                              : San Salvador, El Salvador
     Primary Contact
       Contact Name           : Wilfredo Amaya Zelaya
       Telephone (primary)    : 503-260-7920 x 235
       Telephone (secondary)  : 503-260-8000
       Fax                    : 503-260-7919
       E-mail                 : wamaya@cnr.gob.sv
     Secondary Contact
       Contact Name           : Carlos Adrian Rodriguez
       Telephone (primary)    : 503-260-7920
       Telephone (secondary)  : 
       Fax                    : 503-260-7919
       E-mail                 : crodriguez@ign.cnr.gob.sv
     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           : (Y)
       Monument Description   : (Y)
       Site Pictures          : (Y)
     Additional Information   : 
     Antenna Graphics with Dimensions


TRM29659.00


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                    +------x------+                       <--  0.0000  BPA=ARP

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