CHAT Site Information Form International GPS Service for Geodynamics 0. Form Prepared by (full name) : R. John Beavan Date Prepared : 28-NOV-2001 Report Type : UPDATE Prepared Using : vi 1. Site Identification of the GPS Monument Site Name : Chatham Island Four Character ID : CHAT Monument Inscription : none IERS DOMES Number : 50207M001 CDP Number : not assigned Date Installed : 04-OCT-1995 hh:mm UT Geologic Characteristic : Early Eocene tuff Bedrock Type : Volcanic extrusives Bedrock Condition : not applicable Fracture Spacing : not applicable Notes : The site is located on early Eocene Red Bluff : tuff, which weathers to a sticky clay. A test : drill hole in 1973 revealed a 2.5' crust of : clayey soil with a very firm 1' layer beneath : it. Underlying this is about 100' of sometimes : firm and sometimes soft waterlogged soil, with : firm layers between 100'-110', and rock : encountered at 110'. The rock type at basement : is not indicated, but may be late Cretaceous : extrusive volcanics. Additional Information : The GPS station was installed at this site for : convenience of access to power and telephone. : It is intended to install a new seismic station : on a hard rock site on the Chatham Islands : within the next few years; we will investigate : the possibility of moving the GPS receiver to : colocate with the seismic station at that time. : : A preexisting 0.6 m x 0.8 m x 0.5 m deep : seismometer vault was utilised for the : monument. The vault has been in place for many : years and is presumably founded in the "very : firm" layer described above at about 1 m depth. : The vault was filled with reinforced concrete to : make a pad, and a 0.3 m x 0.3 m x 0.5 m high : reinforced concrete pillar was constructed on : top of the pad. A 15 cm diameter stainless : plate with protruding 5/8"-11 screw was set : exactly horizontal in the top of the concrete. : Height of pillar above pad is 0.5 m. Height of : pad above ground level is about 0.2 m. The top : concrete surface and the corners of the pillar : were deliberately made uneven to reduce : resonance effects between the top of the pillar : and the antenna. : The stainless plate serves as the height : reference point. 2. Site Location Information City or Town : Waitangi State or Province : Chatham Island Country : New Zealand Tectonic Plate : PAC Approximate Position X coordinate (m) : -4590671.0 Y coordinate (m) : -275482.9 Z coordinate (m) : -4404596.7 Latitude (deg) : 43.9558 S Longitude (deg) : 183.4342 E Elevation (m) : 58 Additional Information : The antenna is mounted on a 0.7 m high pillar : inside a low fence, located on the grounds of : the NZ MetService station. The receiver and : other equipment are inside a padlocked hut : about 25 m from the antenna. Communication is : by phone. 3. GPS Receiver Information 3.1 Receiver Type : ROGUE SNR-8000 Serial Number : T133 Firmware Version : 3.2, field config. 8, 95/02/28 Date Installed : 04-OCT-1995 hh:mm UT Date Removed : 19-MAY-1999 21:45 UT Additional Information : (multiple lines) 3.2 Receiver Type : ROGUE SNR-8000 Serial Number : T133 Firmware Version : 3.2.32.8 Date Installed : 19-MAY-1999 21:50 UT Date Removed : 28-NOV-2001 00:00 UT Additional Information : (multiple lines) 3.3 Receiver Type : ASHTECH Z-XII3 Serial Number : LP419994101 Firmware Version : CD00 Date Installed : 28-NOV-2001 03:00 UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : A receiver with choke-ring antenna was run at : site 5503 about 60 metres from CHAT for 1-2 : days before and after the exchange of the CHAT : receiver and antenna. The data will be used to : determine whether there is any apparent position : offset associated with the exchange. 3.x Receiver Type : 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. GPS Antenna Information 4.1 Antenna Type : DORNE MARGOLIN T Serial Number : 142 Antenna Height (m) : 0.0031 Antenna Reference Point : ARP Degree Offset from North : 0 Antenna Radome Type : none Date Installed : 04-OCT-1995 hh:mm UT Date Removed : 28-NOV-2001 00:00 UT Additional Information : (multiple lines) 4.2 Antenna Type : ASH701945C_M Serial Number : 19993903 Antenna Height (m) : 0.0062 Antenna Reference Point : ARP Degree Offset from North : 0 Antenna Radome Type : none Date Installed : 28-NOV-2001 03:00 UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : (multiple lines) 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 5.1 Monument Name : 5503 Site Ref CDP Number : (XXXX) Site Ref Domes Number : (XXXXXXXXX) Differential Components from GPS Mark to Site Reference (ITRS) dx (m) : 36.5275 dy (m) : 3.6587 dz (m) : -39.7829 Accuracy (mm) : 1 Date Measured : 28-FEB-1999 hh:mm UT Additional Information : "5503" is the Geodetic Code for this monument : in the Land Information NZ Geodetic Database. : The values for dx, dy, dz and accuracy are : the mean and standard deviation of six : measurements between Oct 1995 and Feb 1999. 5.2 Monument Name : 5505 Site Ref CDP Number : (XXXX) Site Ref Domes Number : (XXXXXXXXX) Differential Components from GPS Mark to Site Reference (ITRS) dx (m) : -20.519 dy (m) : 657.227 dz (m) : -24.860 Accuracy (mm) : 2 Date Measured : 04-NOV-1998 hh:mm UT Additional Information : "5505" is the LINZ geodetic code for this : monument. : The values for dx, dy, dz and accuracy are : the mean and standard deviation of three : measurements between Oct 1995 and Nov 1998. 5.3 Monument Name : DORIS monument Site Ref CDP Number : (XXXX) Site Ref Domes Number : (XXXXXXXXX) Differential Components from GPS Mark to Site Reference (ITRS) dx (m) : 26.4382 dy (m) : 46.4134 dz (m) : -30.3750 Accuracy (mm) : 1 Date Measured : 27-FEB-1999 hh:mm UT Additional Information : DORIS station newly installed by IGN in : February 1999. 5.4 Monument Name : Tidal bench mark, installed Feb 1999 Site Ref CDP Number : (XXXX) Site Ref Domes Number : (XXXXXXXXX) Differential Components from GPS Mark to Site Reference (ITRS) dx (m) : -701.430 dy (m) : -490.358 dz (m) : 821.309 Accuracy (mm) : 2 Date Measured : 25-FEB-1999 hh:mm UT Additional Information : New bench mark installed on concrete : wharf at Waitangi, reasonably close to : Chatham Island tide gauge. Installation : by Herve Fagard, IGN, Feb 1999. 5.x Monument Name : Site Ref CDP Number : (XXXX) Site Ref Domes Number : (XXXXXXXXX) Differential Components from GPS Mark 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 : INTERNAL Frequency : Effective Dates : 04-OCT-1995 - dd-MMM-yyyy Notes : (multiple lines) 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 : DORIS Status : PERMANENT Effective Dates : 27-FEB-1999 - dd-MMM-yyyy Notes : (multiple lines) 7.x Instrumentation Type : (DORIS/GLONASS/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 : MP300 Manufacturer : Rotronic Data Frequency : 1 hour Accuracy (% rel h) : 2 Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : Met sensors are at the NZ MetService weather : station, and predate the installation of the : GPS receiver. The sensors are calibrated : annually by NZ MetService. 8.2 Pressure Sensor Model : DPA21 Manufacturer : Vaisala Data Frequency : 1 hour Accuracy (mbar) : 0.3 Height Diff to GPS (m) : 1 +- 2 m above GPS antenna. Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : See above. : The height difference will be measured more : accurately on a future maintenance visit. 8.3 Temperature Sensor Model : YSI 703 series Manufacturer : Yellow Springs Instruments Data Frequency : 1 hour Accuracy (deg C) : 0.2 Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : Temperatures are reported to the nearest degree. 8.4 Water Vapor Radiometer : Manufacturer : Distance to GPS (m) : (m) Elev Diff to GPS (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 : IGNS Mailing Address : IGNS, P.O. Box 30-368, Lower Hutt, NZ Primary Contact Contact Name : John Beavan Telephone (primary) : +64 4 570 4641 Telephone (secondary) : +64 4 570 1444 Fax : +64 4 570 1440 E-mail : j.beavan@gns.cri.nz Secondary Contact Contact Name : Dion Matheson Telephone (primary) : +64 4 570 4890 Telephone (secondary) : +64 4 570 1444 Fax : +64 4 570 1440 E-mail : d.matheson@gns.cri.nz Additional Information : The data are picked up from GNS by JPL, who : handle the further distribution to IGS data : centers. Contacts are David Stowers : (dstowers@jpl.nasa.gov) and Razmik Khachikyan : (Razmik.Khachikyan@jpl.nasa.gov). 10. Responsible Agency (if different from 9.) Agency : As in 9. 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) 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 ASH701945C_M +-------+ / + \ <-- 0.1280 L2 | + | <-- 0.1100 L1 +-----------------+-------------+------------------+ <-- 0.1006 TCR | | | | | | | | +-+--------------------------------------------------+-+ <-- 0.0376 +-------------------+-------------+--------------------+ <-- 0.0346 BCR | | | | +------x------+ <-- 0.0000 BPA=ARP <-- 0.3890 --> ARP: Antenna Reference Point L1 : L1 Phase Center L2 : L2 Phase Center TCR: Top of Chokering BCR: Bottom of Chokering