ISPA00CHL 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) : Jacob Sklar Date Prepared : 2025-07-15 Report Type : UPDATE If Update: Previous Site Log : ispa00chl_20210505.log Modified/Added Sections : 1, 2, 3.2, 3.3, 3.4, 4.2, 4.3, 4.4, 5.1, : 8.1.1, 8.1.2, 8.1.3, 8.1.4, 8.2.1, 8.2.2, : 8.2.3, 8.2.4, 8.3.1, 8.3.2, 8.3.3, 8.3.4, 11, : 12 1. Site Identification of the GNSS Monument Site Name : Easter Island (Isla de Pascua) Nine Character ID : ISPA00CHL Monument Inscription : ISPA (North leg of monument) IERS DOMES Number : 41703M007 CDP Number : Monument Description : SCIGN SHORT DRILL-BRACED STAINLESS STEEL Height of the Monument : 1.7 m Monument Foundation : BASALT BEDROCK Foundation Depth : 1.6 m Marker Description : SCIGN MOUNT Date Installed : 2004-02-13T00:00Z Geologic Characteristic : BEDROCK Bedrock Type : IGNEOUS Bedrock Condition : Fracture Spacing : Fault zones nearby : Distance/activity : Additional Information : East South Pacific Island, about 500 : kilometers east of the crest of the East : Pacific Rise. The island is the product of : three principle volcanic structures. : Some evidence suggests that the island is : on a microplate at the edge of the Nazca : Plate. Geological information from "NASA : Space Geodesy Program Technical : Memorandum 4482, March 1993, p99. 2. Site Location Information City or Town : Easter Island State or Province : Country or Region : CHL Tectonic Plate : NAZCA Approximate Position (ITRF) X coordinate (m) : -1881702.3544 Y coordinate (m) : -5359980.1114 Z coordinate (m) : -2890599.3474 Latitude (N is +) : -270729.94 Longitude (E is +) : -1092039.83 Elevation (m,ellips.) : 112.5 Additional Information : The site is located on the south part : of the South Pacific Chilean island, : Easter Island. The facility is located : inland about 9 km east of Mataveri : Airport. To reach the station from the main : entrance of the Mataveri Airport, proceed : southeast along the road that parallels : the runway for 1.2 kilometers to a fork in : the road. Bear left (northeast) onto the : left fork and proceed past the NASA station : (EISL) after about 4.1 kilometers, make a : right turn onto a dirt road after about : another 5 km. Follow dirt road south to site. 3. GNSS Receiver Information 3.1 Receiver Type : ASHTECH UZ-12 Satellite System : GPS Serial Number : UC120031602 Firmware Version : CN00 Elevation Cutoff Setting : 0 deg Date Installed : 2004-02-13T00:00Z Date Removed : 2007-03-30T02:00Z Temperature Stabiliz. : none Additional Information : 3.2 Receiver Type : ASHTECH UZ-12 Satellite System : GPS Serial Number : UC2200524015 Firmware Version : CQ00 Elevation Cutoff Setting : 0 deg Date Installed : 2007-06-03T06:00Z Date Removed : 2023-09-23T00:00Z Temperature Stabiliz. : none Additional Information : 3.3 Receiver Type : SEPT POLARX5 Satellite System : GPS+GLO+GAL+BDS Serial Number : 3025510 Firmware Version : 5.4.0 Elevation Cutoff Setting : 0 deg Date Installed : 2023-09-23T00:01Z Date Removed : 2024-11-11T15:35Z Temperature Stabiliz. : Additional Information : 3.4 Receiver Type : SEPT POLARX5 Satellite System : GPS+GLO+GAL+BDS Serial Number : 3025510 Firmware Version : 5.5.0 Elevation Cutoff Setting : 0 deg Date Installed : 2024-11-11T15:39Z 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 : ASH701945E_M SCIT Serial Number : CR620024321 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0083 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : SCIT Radome Serial Number : 0117 Antenna Cable Type : Times Microwave LMR 400 Antenna Cable Length : 36 m Date Installed : 2004-02-13T00:00Z Date Removed : 2012-10-05T00:00Z Additional Information : SCIGN mount s/n 0669. 4.2 Antenna Type : ASH701945E_M SCIT Serial Number : CR620024321 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0083 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : SCIT Radome Serial Number : 0117 Antenna Cable Type : Times Microwave LMR 600 Antenna Cable Length : 170 m Date Installed : 2012-10-05T00:00Z Date Removed : 2023-09-22T21:45Z Additional Information : SCIGN mount s/n 0669. : new antenna cable installed 4.3 Antenna Type : ASH701945E_M SCIT Serial Number : CR620024321 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0083 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : SCIT Radome Serial Number : 2422 Antenna Cable Type : Times Microwave LMR 600 Antenna Cable Length : 170 m Date Installed : 2023-09-22T21:55Z Date Removed : 2025-06-25T18:20Z Additional Information : SCIGN mount s/n 0669. : New dome installed 4.4 Antenna Type : ASH701945E_M SCIT Serial Number : CR620024321 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0083 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : SCIT Radome Serial Number : 2422 Antenna Cable Type : Times Microwave LMR 400 Antenna Cable Length : 19 m Date Installed : 2025-06-25T19:00Z Date Removed : (CCYY-MM-DDThh:mmZ) Additional Information : New shorter LMR400 cable installed. Receiver : was relocated to RPN seismic vault closer to : the antenna 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 5.1 Tied Marker Name : JPL 4008-S Tied Marker Usage : GPS (EISL mark) Tied Marker CDP Number : none Tied Marker DOMES Number : 41703M003 Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : dy (m) : dz (m) : Accuracy (mm) : Survey method : GPS CAMPAIGN Date Measured : (CCYY-MM-DDThh:mmZ) Additional Information : This tie marker is the old EISL mark. : Site will run for about one year till : sufficient data has been recorded. : Differential components will be published : at that time. 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 : 2004-02-13/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 : SEISMOMETER Status : PERMANENT Effective Dates : CCYY-MM-DD/CCYY-MM-DD Notes : Operated by IRIS. 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 : Capacitance Probe Manufacturer : Paroscientific Serial Number : Data Sampling Interval : 300 sec Accuracy (% rel h) : 2 Aspiration : NATURAL Height Diff to Ant : 0.0 m Calibration date : Effective Dates : 2004-02-13/2012-10-04 Notes : 8.1.2 Humidity Sensor Model : MET4 Manufacturer : Paroscientific Serial Number : 115107 Data Sampling Interval : 60 sec Accuracy (% rel h) : 2 Aspiration : UNASPIRATED Height Diff to Ant : 0.5 m Calibration date : Effective Dates : 2012-10-05/2023-09-24 Notes : Corrected height difference on 2017-05-02. 8.1.3 Humidity Sensor Model : MET4 Manufacturer : Paroscientific Serial Number : 146597 Data Sampling Interval : 60 sec Accuracy (% rel h) : 2 Aspiration : UNASPIRATED Height Diff to Ant : 0.5 m Calibration date : Effective Dates : 2023-09-24/2025-06-23 Notes : Corrected height difference on 2017-05-02. 8.1.4 Humidity Sensor Model : MET4 Manufacturer : Paroscientific Serial Number : 144568 Data Sampling Interval : 60 sec Accuracy (% rel h) : 2 Aspiration : UNASPIRATED Height Diff to Ant : 0.5 m Calibration date : Effective Dates : 2025-06-23/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 : Digiquartz Barometric Standard Manufacturer : Paroscientific Serial Number : Data Sampling Interval : 300 sec Accuracy : 0.01 hPa Height Diff to Ant : 0.0 m Calibration date : Effective Dates : 2004-02-13/2012-10-04 Notes : 8.2.2 Pressure Sensor Model : MET4 Manufacturer : Paroscientific Serial Number : 115107 Data Sampling Interval : 60 sec Accuracy : 0.1 hPa Height Diff to Ant : 0.5 m Calibration date : Effective Dates : 2012-10-05/2023-09-24 Notes : Corrected height difference on 2017-05-02. 8.2.3 Pressure Sensor Model : MET4 Manufacturer : Paroscientific Serial Number : 146597 Data Sampling Interval : 60 sec Accuracy : 0.1 hPa Height Diff to Ant : 0.5 m Calibration date : Effective Dates : 2023-09-24/2025-06-23 Notes : Corrected height difference on 2017-05-02. 8.2.4 Pressure Sensor Model : MET4 Manufacturer : Paroscientific Serial Number : 144568 Data Sampling Interval : 60 sec Accuracy : 0.1 hPa Height Diff to Ant : 0.5 m Calibration date : Effective Dates : 2025-06-23/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 : Platinum Resistance Temperature Probe Manufacturer : Paroscientific Serial Number : Data Sampling Interval : 300 sec Accuracy : 0.5 deg C Aspiration : NATURAL Height Diff to Ant : 0.0 m Calibration date : Effective Dates : 2004-02-13/2012-10-04 Notes : 8.3.2 Temp. Sensor Model : MET4 Manufacturer : Paroscientific Serial Number : 115107 Data Sampling Interval : 60 sec Accuracy : 0.5 deg C Aspiration : UNASPIRATED Height Diff to Ant : 0.5 m Calibration date : Effective Dates : 2012-10-05/2023-09-24 Notes : Corrected height difference on 2017-05-02. 8.3.3 Temp. Sensor Model : MET4 Manufacturer : Paroscientific Serial Number : 146597 Data Sampling Interval : 60 sec Accuracy : 0.5 deg C Aspiration : UNASPIRATED Height Diff to Ant : 0.5 m Calibration date : Effective Dates : 2023-09-24/2025-06-23 Notes : Corrected height difference on 2017-05-02. 8.3.4 Temp. Sensor Model : MET4 Manufacturer : Paroscientific Serial Number : 144568 Data Sampling Interval : 60 sec Accuracy : 0.5 deg C Aspiration : UNASPIRATED Height Diff to Ant : 0.5 m Calibration date : Effective Dates : 2025-06-23/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 10.1 Date : 2011-09-09/2011-09-09 Event : Transition from .soc to .ash data types. : For soc data types used soc2rnx to do the : conversion to RINEX data. For ash data types : using teqc directly to do the conversion to : RINEX data. 10.x Date : (CCYY-MM-DD/CCYY-MM-DD) Event : (TREE CLEARING/CONSTRUCTION/etc) 11. On-Site, Point of Contact Agency Information Agency : EarthScope Consortium Preferred Abbreviation : (A10) Mailing Address : (multiple lines) Primary Contact Contact Name : EarthScope point of contact Telephone (primary) : Telephone (secondary) : Fax : E-mail : ggn-ops@earthscope.org Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : 12. Responsible Agency (if different from 11.) Agency : Jet Propulsion Laboratory Preferred Abbreviation : JPL Mailing Address : 4800 Oak Grove Drive : Pasadena, CA 91109 USA Primary Contact Contact Name : JPL point of contact Telephone (primary) : 1-818-354-7055 Telephone (secondary) : Fax : 1-818-393-4965 E-mail : ggnops@jpl.nasa.gov Secondary Contact Contact Name : EarthScope point of contact Telephone (primary) : Telephone (secondary) : Fax : E-mail : ggn-ops@earthscope.org Additional Information : 13. More Information Primary Data Center : JPL Secondary Data Center : CDDIS URL for More Information : Hardcopy on File Site Map : Y Site Diagram : Y Horizon Mask : Y Monument Description : Y Site Pictures : Y Additional Information : Antenna Graphics with Dimensions +-------+ / \ | | +-----------------+-------------+-----------------+ <-- 0.1006 TCR | | | | | | | | +-+-------------------------------------------------+-+ <-- 0.0376 +-------------------+-------------+-------------------+ <-- 0.0346 BCR | | | | +------x------+ <-- 0.0000 BPA=ARP NOM=NRP <-- 0.3794 -->