TWTF00TWN 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) : Shinn Yan Lin Date Prepared : 2024-08-06 Report Type : UPDATE If Update: Previous Site Log : twtf_20240802.log Modified/Added Sections : 4.2 1. Site Identification of the GNSS Monument Site Name : Taoyuan Four Character ID : TWTF Monument Inscription : no monument, GPS antenna reference point IERS DOMES Number : 23603S002 CDP Number : Monument Description : STEEL MAST Height of the Monument : 3.3 m Monument Foundation : ROOF Foundation Depth : Marker Description : Date Installed : 2001-08-01T00:00Z Geologic Characteristic : Bedrock Type : Bedrock Condition : Fracture Spacing : Fault zones nearby : Distance/activity : Additional Information : 2. Site Location Information City or Town : Taoyuan State or Province : Taiwan Country : Taiwan Tectonic Plate : EURASIAN Approximate Position (ITRF) X coordinate (m) : -2994425.0400 Y coordinate (m) : 4951312.2400 Z coordinate (m) : 2674498.6000 Latitude (N is +) : +245712.96 Longitude (E is +) : +1210952.20 Elevation (m,ellips.) : 203.1 Additional Information : 3. GNSS Receiver Information 3.1 Receiver Type : ASHTECH Z-XII3T Satellite System : GPS Serial Number : RT920012202 Firmware Version : Z-XII3 Elevation Cutoff Setting : 10 deg Date Installed : 2001-08-01T00:00Z Date Removed : 2015-05-02T19:36Z Temperature Stabiliz. : Additional Information : 3.2 Receiver Type : SEPT POLARX4 Satellite System : GPS+GLO+QZSS+SBAS Serial Number : 3008040 Firmware Version : 2.9.0 Elevation Cutoff Setting : 10 deg Date Installed : 2015-10-26T00:00Z Date Removed : 2020-10-06T01:00Z Temperature Stabiliz. : Additional Information : 3.3 Receiver Type : SEPT POLARX4TR Satellite System : GPS+GLO+GAL+BDS+QZSS+SBAS Serial Number : 3008014 Firmware Version : 2.9.6 Elevation Cutoff Setting : 10 deg Date Installed : 2020-10-06T02:00Z 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 : ASH701945C_M SCIS Serial Number : CR620012101 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 : Andrew FSJ1-50A Antenna Cable Length : 30 m Date Installed : 2001-08-01T00:00Z Date Removed : 2024-08-02T00:00Z Additional Information : 4.2 Antenna Type : SEPCHOKE_B3E6 SPKE Serial Number : 5293 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 : SPKE Radome Serial Number : Antenna Cable Type : Andrew FSJ1-50A Antenna Cable Length : 30 m Date Installed : 2024-08-02T01:00Z 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 : EXTERNAL CESIUM Input Frequency : 10.0 MHz Effective Dates : 2000-04-24/2004-12-21 Notes : 6.2 Standard Type : EXTERNAL STEERED H-MASER Input Frequency : 10.0 MHz Effective Dates : 2004-12-21/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 : GPS+Time Status : PERMANENT Effective Dates : 2015-10-26/CCYY-MM-DD Notes : 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, Inc. Serial Number : Data Sampling Interval : 5 sec Accuracy (% rel h) : 2 Aspiration : Height Diff to Ant : -1.0 m Calibration date : Effective Dates : 2001-08-01/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 transducer Manufacturer : Paroscientific, Inc. Serial Number : Data Sampling Interval : 5 sec Accuracy : 0.08 hPa Height Diff to Ant : -1.0 m Calibration date : Effective Dates : 2001-10-29/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 : Resistance temperature device Manufacturer : Paroscientific, Inc. Serial Number : Data Sampling Interval : 5 sec Accuracy : 0.5 deg C Aspiration : Height Diff to Ant : -1.0 m Calibration date : Effective Dates : 2001-08-01/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 : National Standard Time and Frequency Lab, : Telecommunication Laboratories, Chunghwa : Telecom Preferred Abbreviation : TL Mailing Address : No 99 Dianyan Road, Yangmei Taoyuan, Taiwan, : 32661 Primary Contact Contact Name : Calvin S.Y Lin Telephone (primary) : +886 3 424-5483 Telephone (secondary) : Fax : +886 3 424-5474 E-mail : sylin@cht.com.tw Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : 12. Responsible Agency (if different from 11.) Agency : National Standard Time and Frequency Lab, : Telecommunication Laboratories, Chunghwa : Telecom Preferred Abbreviation : TL Mailing Address : No 99 Dianyan Road, Yangmei Taoyuan, Taiwan, : 32661 Primary Contact Contact Name : Calvin S.Y Lin Telephone (primary) : +886-3-4245483 Telephone (secondary) : Fax : +886-3-4245474 E-mail : sylin@cht.com.tw Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : 13. More Information Primary Data Center : CDDIS Secondary Data Center : JPL URL for More Information : Hardcopy on File Site Map : Site Diagram : Horizon Mask : Monument Description : Site Pictures : Additional Information : Antenna Graphics with Dimensions