NPLB Site Information Form GPS/GLONASS Campaign IGEX98 0. Form Prepared by (full name) : Mr Jon Clarke Date Prepared : 06-APR-1999 Report Type : NEW Prepared Using : Programmer's File Editor 1. Site Identification of the GPS/GLONASS Monument Site Name : Teddington Four Character ID : NPLB Monument Inscription : NPLB IERS DOMES Number : 13234M002 CDP Number : Monument Description : Top of aluminium pole Date Installed : 20-AUG-1997 (hh:mm UT) Geologic Characteristic : (BEDROCK/CLAY/CONGLOMERATE/GRAVEL/SAND/etc) Bedrock Type : (IGNEOUS/METAMORPHIC/SEDIMENTARY) Bedrock Condition : (FRESH/JOINTED/WEATHERED) Fracture Spacing : (1-10 cm/10-50 cm/50-200 cm/over 200 cm) Notes : (multiple lines) Additional Information : Pole is mounted at the North East corner of the liftshaft on Building 2. 2. Site Location Information City or Town : Teddington State or Province : Greater London Country : United Kingdom Tectonic Plate : Eurasian Approximate Position X coordinate (m) : 3985502.5969 Y coordinate (m) : -23625.5546 Z coordinate (m) : 4962941.9106 Latitude (deg) : ( dd.dddd N/S) Longitude (deg) : (ddd.dddd E/W) Elevation (m) : (m) Additional Information : Co-ords supplied by Tim Springer, AIUB, using Bernese software with December 1998 epoch data. 3. Receiver Information 3.1 Receiver Type : ASHTECH Z-XII3 Satellite System : GPS Serial Number : LP0Z962 Firmware Version : 1I08 Date Installed : 20-AUG-1997 (hh:mm UT) Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : ASHTECH Z12 modified for time transfer. Contributing to IGEX98 as the colocated dual-frequency GPS receiver accompanying NPLC, the single frequency GPS/Glonass receiver. 3.x Receiver Type : Satellite System : (GPS/GLONASS/GPS+GLONASS) Serial Number : Firmware Version : Date Installed : (dd-MMM-yyyy hh:mm UT) Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : (multiple lines) 4. Antenna Information 4.1 Antenna Type : GEODETIC III L1/L2 Serial Number : GA14124 Antenna Height (m) : 0 Antenna Reference Point : ARP Degree Offset from North : 0 Antenna Radome Type : None Date Installed : 20-AUG-1997 (hh:mm UT) Date Removed : 07-SEP-1998 (12:00 UT) Additional Information : Ashtech part # 700718(B) 4.2 Antenna Type : GEODETIC III L1/L2 Serial Number : GA14124 Antenna Height (m) : 0 Antenna Reference Point : ARP Degree Offset from North : 0 Antenna Radome Type : None Date Installed : 07-SEP-1998 (12:00 UT) Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : Ashtech part # 700718(B). The antenna was moved about 5m East away from a copper observatory dome to reduce multipath. 4.x Antenna Type : Serial Number : Antenna Height (m) : (m) Antenna Reference Point : (ARP/BCR/BPA) Degree Offset from North : Antenna Radome Type : Date Installed : (dd-MMM-yyyy hh:mm UT) Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : (multiple lines) 5. Local Site Ties 5.x Monument Name : Site Ref CDP Number : (XXXX) Site Ref Domes Number : (XXXXXXXXX) Differential Components from GPS/GLONASS Marker to Site Reference (ITRS) dx (m) : (m) dy (m) : (m) dz (m) : (m) Accuracy (mm) : (mm) Date Measured : (dd-MMM-yyyy hh:mm UT) Additional Information : (multiple lines) 6. Frequency Standard 6.1 Standard Type : H-MASER Frequency : 5 MHz Effective Dates : 20-AUG-1997 - 15-MAY-1998 Notes : This is HM2, a Sigma Tau active H maser. It is the source of UTC(NPL), delayed by about 8.3 microseconds. Port C2 of distr. amp. id 182. 6.2 Standard Type : H-MASER Frequency : 5 MHz Effective Dates : 15-MAY-1998 - 17-JUN-1998 Notes : This is HM2, a Sigma Tau active H maser. It is the source of UTC(NPL), delayed by about 8.3 microseconds. Port C2 of distr. amp. id 182. Changed 1pps cable. 6.3 Standard Type : H-MASER Frequency : 5 MHz Effective Dates : 17-JUN-1998 - 13-JUL-1998 Notes : This is HM2, a Sigma Tau active H maser. It is the source of UTC(NPL), delayed by about 8.3 microseconds. Port C2 of distr. amp. id 182. Changed 1pps cable. 6.4 Standard Type : H-MASER Frequency : 5 MHz Effective Dates : 13-JUL-1998 (- dd-MMM-yyyy) Notes : This is HM1, a Sigma Tau active H maser. It is the source of UTC(NPL), delayed by 8440 ns (measured on 05-MAR-1999). Port C2 of distr. amp. id 182. HM2 replaced by HM1 for UTC(NPL) following malfunction on 11-JUL-1998. 6.x Standard Type : (H-MASER/CESIUM/QUARTZ/INTERNAL/RUBIDIUM) Frequency : Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : (multiple lines) 7. Collocation Information 7.1 Instrumentation Type : GPS/GLONASS Status : PERMANENT Effective Dates : 21-Oct-1998 (- dd-MMM-yyyy) Notes : 3S R100, NPLC, GPS/Glonass receiver, contributing to IGEX98. 7.2 Instrumentation Type : TWSTFT Status : PERMANENT Effective Dates : 20-AUG-1997 (- dd-MMM-yyyy) Notes : Two-way satellite time and frequency transfer earth station. 7.3 Instrumentation Type : GPS Status : PERMANENT Effective Dates : 20-AUG-1997 (- dd-MMM-yyyy) Notes : Allen Osborne Associates TTR4P dual frequency geodetic receiver. 7.4 Instrumentation Type : GPS Status : PERMANENT Effective Dates : 20-AUG-1997 (- dd-MMM-yyyy) Notes : Three Allen Osborne Associates TTR5 for BIPM common view time transfer. 7.x Instrumentation Type : (GPS/GLONASS/DORIS/PRARE/SLR/VLBI) Status : (PERMANENT/MOBILE) Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : (multiple lines) 8. Meteorological Instrumentation 8.1 Humidity Sensor Model : Manufacturer : Data Frequency : Accuracy (% rel h) : (% rel h) Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : (multiple lines) 8.2 Pressure Sensor Model : Manufacturer : Data Frequency : Accuracy (mbar) : (mbar) Height Diff to Ant (m) : (m) Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : (multiple lines) 8.3 Temperature Sensor Model : Squirrel Manufacturer : Grant Data Frequency : 4 minutes Accuracy (deg C) : 0.05 (nominal) Effective Dates : 03-NOV-1998 (- dd-MMM-yyyy) Notes : Surface probe bonded into antenna, another attached to receiver case. Air probes distributed inside and outside time transfer lab. 8.4 Water Vapor Radiometer : Manufacturer : Distance to Antenna (m): (m) Elev Diff to Ant (m) : (m) Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : (multiple lines) 8.5 Other Instrumentation : (multiple lines) 9. On-Site, Point of Contact Agency Information Agency : National Physical Laboratory Mailing Address : NPL, Queens Road, Teddington, Middlesex, TW11 0LW, UK. Primary Contact Contact Name : Mr Jon Clarke Telephone (primary) : +44 (0) 181 943 6548 Telephone (secondary) : +44 (0) 181 943 6351 Fax : +44 (0) 181 943 7138 E-mail : jdc@npl.co.uk Secondary Contact Contact Name : Dr John Davis Telephone (primary) : +44 (0) 181 943 7137 Telephone (secondary) : +44 (0) 181 943 6351 Fax : +44 (0) 181 943 7138 E-mail : jad@npl.co.uk Additional Information : (multiple lines) 10. Responsible Agency (if different from 9.) Agency : (multiple lines) 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) 11. More Information URL for More Information : Hardcopy on File Site Map : (Y) Site Diagram : (Y) Horizon Mask : (Y) Monument Description : (Y) Site Pictures : (Y) Additional Information : (multiple lines) Antenna Graphics with Dimensions Ashtech: GEODETIC III L1/L2 _____________ / \ +--- + ---+ <-- 0.072 L1=L2 +------------------------------------------------------+ <-- 0.065 TGP +-------------------+-------------+--------------------+ | | =| | +-------------+ <-- 0.018 | | +--+--+ <-- 0.000 ARP <-- 0.368 --> 12. Local Events Possibly Affecting Computed Position 12.x Date : (dd-MMM-yyyy hh:mm UT) Event : (multiple lines)