CRAR Site Information Form GPS/GLONASS Campaign IGEX98 0. Form Prepared by (full name) : Larry D. Hothem Date Prepared : 01-FEB-1999 Report Type : UPDATE Prepared Using : WP Editor 1. Site Identification of the GPS/GLONASS Monument Site Name : Crary Science and Engineering Center Four Character ID : CRAR Monument Inscription : none IERS DOMES Number : 66001M004 CDP Number : (XXXX) Monument Description : STEEL PLATE ON MAST Date Installed : 16-DEC-1998 01:08 UT Geologic Characteristic : VOLCANIC FLOWS and WELDED TEPHRA Bedrock Type : VOLCANIC Bedrock Condition : POLYGONAL CRACK PATTERN Fracture Spacing : over 200 cm Notes : Ross Island and vicinity consists of : vocanic rock. It is not clear : whether frost action actively exploits : the cracks. Additional Information : The tectonic structure of the area is : unclear. Mount Erebus, an active volcano, : is located about 38km north of station CRAR. 2. Site Location Information City or Town : McMurdo Station State or Province : Ross Island Country : Antarctica Tectonic Plate : Antarctic Approximate Position X coordinate (m) : -1310643.79 (m) Y coordinate (m) : 310590.23 (m) Z coordinate (m) : -6213367.72 (m) Latitude (deg) : 77.848042 S Longitude (deg) : 166.668242 E Ellipsoid Height (m) : -19.94 (m) Geoid undulation (m) : -53.38 (m) Elevation (m) (1) : (33.44) (m) Additional Information : Geoid Model: EGM96 : (1) Elevation computed : Datum: ITRF94 : Updated position in ITRF96 system relative : to IGS station MCM4 is pending. 3. Receiver Information 3.1 Receiver Type : JPS Legacy/G Satellite System : GPS+GLONASS Serial Number : L00071 (Rec ID MT310943221) Firmware Version : 1.4 (21-JAN-1999) Date Installed : 16-DEC-1998, 01:08 UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : New Firmware V1.4 (dated 21-JAN-1999) : installed 28-JAN-1999, 01:04 UT, replacing : firmware V1.3 (dated 10-JAN-1999) 4. Antenna Information 4.1 Antenna Type : JPS RegAnt Choke Ring Serial Number : RA0044 Antenna Height (m) : 0.090 (m) Antenna Reference Point : ARP Degree Offset from North : 0 Antenna Radome Type : Antenna inside waterproof enclosure Date Installed : 16-DEC-1998, 01:08 UT Date Removed : (dd-MMM-yyyy hh:mm UT) Additional Information : Model for antenna entered in initial : logs was incorrect. Rather than : GalAnt model, it is a RegAnt Choke : Ring. Verification pending on type : of choke ring, i.e. whether it is a : RegAnt-1 (single-depth choke ring) : or a RegAnt-2 (dual-depth choke : ring). : : Independent calibration pending : (see Item 11) 5. Local Site Ties 5.1 Monument Name : MCM4 Site Ref CDP Number : 4025 Site Ref Domes Number : 66001M003 Differential Components from GPS/GLONASS Marker to Site Reference (ITRS) dx (m) : -1059.47 (m) dy (m) : 224.89 (m) dz (m) : 112.60 (m) Accuracy (mm) : 50 (mm) Date Measured : NOV-1997 Additional Information : Pending is updated tie data. 6. Frequency Standard 6.1 Standard Type : INTERNAL Frequency : QUARTZ Effective Dates : 16-DEC-1998 - (dd-MMM-yyyy) Notes : (multiple lines) 7. Collocation Information 7.1 Instrumentation Type : GPS Status : PERMANENT Effective Dates : 31-JAN-1995 - present Notes : IGS Station MCM4. : Adjacent to station MCM4 is a dish : antenna used primarially as : downlink for RADARSAT data. With : appropriate instrument upgrade, this : antenna could be used for VLBI : observations. 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 : Limited data may be available from : McMurdo Meteorlogical Station 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 : Limited data may be available from : McMurdo Meteorlogical Station 8.3 Temperature Sensor Model : Manufacturer : Data Frequency : Accuracy (deg C) : (deg C) Effective Dates : (dd-MMM-yyyy - dd-MMM-yyyy) Notes : Limited data may be available from : McMurdo Meteorlogical Station 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 : Limited data may be available from : McMurdo Meteorlogical Station 8.5 Other Instrumentation : (multiple lines) 9. On-Site, Point of Contact Agency Information Agency : US Geological Survey Mailing Address : (multiple lines) Primary Contact Contact Name : Larry D. Hothem Telephone (primary) : Telephone (secondary) : Fax : E-mail : HothemLa@mcmurdo.gov Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : (multiple lines) 10. Responsible Agency (if different from 9.) Agency : US Geological Survey Mailing Address : 521 National Center : Reston, Virginia 20192 USA Primary Contact Contact Name : L. Hothem Telephone (primary) : 1-703-648-4663 Telephone (secondary) : Fax : 1-703-648-4165 E-mail : Lhothem@usgs.gov Secondary Contact Contact Name : J. Mullins Telephone (primary) : 1-703-648-5144 Telephone (secondary) : Fax : 1-703-648-4165 E-mail : jmullins@usgs.gov Additional Information : (multiple lines) 11. More Information URL for More Information : http://unavco.ucar.edu/polar/coordinates/CRAR.html Hardcopy on File Site Map : Y Site Diagram : N Horizon Mask : N Monument Description : Fixed antenna mount on top of mast at : Crary Center loading dock, Phase II Site Pictures : Y Additional Information : (1) Pictures are available as : digital images in JPG format. : (2) JPS RegAnt model antenna is encased : in a hard plastic shell as shown below. : The distances are taken from JPS website: : http://www.javad.com/Products/Hardware/ : RegAnt.htm : (3) Pending in March-April 1999, are plans : by Jerry Mader, NOAA/NGS/Geosciences, to : conduct a calibration analysis. Antenna Graphics with Dimensions (meters) Plastic Housing for Antenna/Choke Ring -------> +-------------------------+ <-- 0.1258 / ------------------- \ / / \ \ +---------+ | + | +---------+ <-- 0.0730 L1/L2 | +-------------------------------------------------+ | <-- 0.xxxx TCR / | | \ | | | | | | | | | | | | \+-----------------------------------------------------+/ |+-----------------------------------------------------+| <-- 0.xxxx BCR \______________ | | ______________/ \ | | / \+---------x---------+/ <-- 0.0000 ARP <-- 0.371 --> ARP: Antenna Reference Point L1 : L1 Phase Center L2 : L2 Phase Center TCR: Top of Chokering BCR: Bottom of Chokering TGP: Top of Ground Plane BGP: Bottom of Ground Plane TPA: Top of Preamplifier BPA: Bottom of Preamplifier TOP: Top of Pole BOP: Bottom of Pole THC: Top of Housing Case 12. Local Events Possibly Affecting Computed Position 12.1 Date : 12-JAN-1999 00:00:00 - 00:52:00 UT Event : Data gap while logging stopped : to reconfigure computer. 12.2 Date : 13-JAN-1999 00:00:00 - 00:28:00 UT Event : Data gap while logging stopped to make : adjustments to software configuration. 12.3 Date : 15-JAN-1999 00:02:00 - 07:29:00 UT Event : Data gap while updating firmware from : Ver. 0.0046 to Ver. 1.3 (10-JAN-1999) 12.4 Date : 23-JAN-1999 04:44:30 - 04:52:00 UT Event : Data gap occurred during testing of : software to automate daily handling of : data. 12.5 Date : 28-JAN-1999 01:04:30 - 01:14:00 UT Event : Data gap while updating firmware from : Ver. 1.3 (10-JAN-1999) to Ver. 1.4 : (21-JAN-1999) 12.6 Date : (dd-MMM-yyyy hh:mm UT) Event : (multiple lines) 12.7 Date : (dd-MMM-yyyy hh:mm UT) Event : (multiple lines)