ALRT00CAN 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) : CACS Operations Date Prepared : 2024-01-08 Report Type : UPDATE If Update: Previous Site Log : alrt_20230808.log Modified/Added Sections : 2, 3.6 1. Site Identification of the GNSS Monument Site Name : Alert Four Character ID : ALRT Monument Inscription : M029001 IERS DOMES Number : 40162M001 CDP Number : Monument Description : Galvanized steel pipe Height of the Monument : 2.0 m Monument Foundation : Permafrost and shale Foundation Depth : 6.0 m Marker Description : Brass plate with steel centering bolt Date Installed : 2002-07-15T00:00Z Geologic Characteristic : Bedrock Type : SHALE Bedrock Condition : Fracture Spacing : Fault zones nearby : No Distance/activity : Additional Information : The GPS reference mark consists of a brass : plate with a forced centering stainless steel : bolt cemented on top of a 12.7cm diameter, 8m : long galvanized steel pipe, set in shale and : permafrost to a depth of 6m. A slurry was : poured into the pipe to ground level and : insulation added to a 0.3m from the top. : Cement was used to top off the remaining part : for setting the brass plate. A 25cm diameter : culvert was placed around the pipe and filed : with sand, and a 0.8m high, 3m square berme : built around it. 2. Site Location Information City or Town : Alert (Ellesmere Island) State or Province : Nunavut Country : Canada Tectonic Plate : NORTH AMERICAN Approximate Position (ITRF) X coordinate (m) : 388042.7500 Y coordinate (m) : -740382.4000 Z coordinate (m) : 6302001.8500 Latitude (N is +) : +822939.46 Longitude (E is +) : -0622025.66 Elevation (m,ellips.) : 78.1 Additional Information : Located at Canada Forces Station Alert. : Receiver is located in the Canadian : Hydrographic Service tide gauge building. 3. GNSS Receiver Information 3.1 Receiver Type : ASHTECH UZ-12 Satellite System : GPS Serial Number : ZR520021002 Firmware Version : CJ00 Elevation Cutoff Setting : 0 deg Date Installed : 2002-07-16T00:00Z Date Removed : 2005-08-12T00:00Z Temperature Stabiliz. : none Additional Information : 3.2 Receiver Type : ASHTECH UZ-12 Satellite System : GPS Serial Number : ZR520021002 Firmware Version : CK00 Elevation Cutoff Setting : 0 deg Date Installed : 2005-08-12T02:02Z Date Removed : 2009-07-28T19:33Z Temperature Stabiliz. : none Additional Information : Power supply failed 2009-07-28 3.3 Receiver Type : ASHTECH UZ-12 Satellite System : GPS Serial Number : ZR520021005 Firmware Version : CK00 Elevation Cutoff Setting : 0 deg Date Installed : 2009-08-20T18:24Z Date Removed : 2009-09-09T20:28Z Temperature Stabiliz. : none Additional Information : Temporary replacement 3.4 Receiver Type : ASHTECH UZ-12 Satellite System : GPS Serial Number : ZR520021002 Firmware Version : CK00 Elevation Cutoff Setting : 0 deg Date Installed : 2009-09-09T20:55Z Date Removed : 2011-05-20T15:45Z Temperature Stabiliz. : none Additional Information : Original receiver with new power supply. : Tracking less than 50% of available satellites : began 2010 D361. Tracking problems initially : appeared October 2010. 3.5 Receiver Type : ASHTECH UZ-12 Satellite System : GPS Serial Number : UC2200511006 Firmware Version : CQ00 Elevation Cutoff Setting : 0 deg Date Installed : 2011-05-20T15:51Z Date Removed : 2019-08-09T13:37Z Temperature Stabiliz. : none Additional Information : 3.6 Receiver Type : SEPT POLARX5 Satellite System : GPS+GLO+GAL Serial Number : 3022749 Firmware Version : 5.2.0 Elevation Cutoff Setting : 0 deg Date Installed : 2019-08-09T13:37Z Date Removed : (CCYY-MM-DDThh:mmZ) Temperature Stabiliz. : Additional Information : 2024-01-08: Corrected FW version to 5.2.0 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 : ASH701945D_M NONE Serial Number : CR520020903 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.1000 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : LMR-240 coaxial cable, Times Microwave System Antenna Cable Length : 30 m Date Installed : 2002-07-16T00:00Z Date Removed : (CCYY-MM-DDThh:mmZ) Additional Information : 2012-06-26: Corrected antenna type from : ASH701945C_M to ASH701945D_M. 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 : INTERNAL Input Frequency : Effective Dates : 2002-07-16/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.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.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.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.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) 8.5.1 Other Instrumentation : Tide gauge 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 : 2006-01-06/2006-01-06 Event : Removed hard packed snow from antenna : choke rings 10.2 Date : 2006-01-15/2006-01-15 Event : Removed hard packed snow from antenna : choke rings 10.3 Date : 2006-02-20/2006-02-20 Event : Removed light dry snow from antenna : choke rings 10.4 Date : 2006-03-09/2006-03-09 Event : Removed light dry snow from antenna : choke rings 10.5 Date : 2006-03-22/2006-03-22 Event : Removed light dry snow from antenna : choke rings 10.6 Date : 2006-12-18/2006-12-18 Event : Removed hard packed snow from antenna : choke rings 10.7 Date : 2007-02-02/2007-02-02 Event : Removed hard packed snow from antenna : choke rings 10.8 Date : 2007-04-25/2007-04-25 Event : Removed hard packed snow from antenna : choke rings 10.9 Date : 2007-10-23/2007-10-23 Event : Removed snow from antenna choke rings : (2013-01-17: corrected start time) 10.10 Date : 2008-03-26/CCYY-MM-DD Event : Removed snow from antenna 10.11 Date : 2008-09-22/2008-09-22 Event : Removed snow from antenna 10.12 Date : 2008-09-24/2008-09-24 Event : Removed snow from antenna 10.13 Date : 2008-10-09/2008-10-09 Event : Removed snow from antenna 10.14 Date : 2008-11-07/2008-11-07 Event : Removed 5 cm of snow from antenna choke : rings and 1 cm from antenna dome 10.15 Date : 2008-11-10/2008-11-10 Event : Removed 5 cm of snow from antenna choke : rings and <1 cm from antenna dome 10.16 Date : 2008-11-19/2008-11-19 Event : Removed 4 cm of snow from antenna choke : rings 10.17 Date : 2008-12-05/CCYY-MM-DD Event : Removed small amount of snow from : antenna dome 10.18 Date : 2008-12-17/2008-12-17 Event : Removed 2 cm of snow from antenna choke : rings and 3 mm from antenna dome 10.19 Date : 2009-02-17/CCYY-MM-DD Event : Removed 2 cm snow/frost from antenna choke : rings and 5 mm from antenna dome 10.20 Date : 2009-02-24/CCYY-MM-DD Event : Removed 1.5 cm of snow from antenna choke : rings and light snow from antenna dome 10.21 Date : 2009-10-15/CCYY-MM-DD Event : Removed 1.5 cm of snow from antenna choke : rings and 1 cm of ice from the antenna dome 10.22 Date : 2009-10-18/CCYY-MM-DD Event : Removed 1.5 cm of snow from antenna choke : rings and dome 10.23 Date : 2009-10-28/CCYY-MM-DD Event : Removed 3 cm of snow from antenna choke rings : and 2 mm of snow and frost from dome 10.24 Date : 2010-01-11/CCYY-MM-DD Event : Removed 2 cm of snow and ice from antenna : choke rings and dome 10.25 Date : 2010-01-25/CCYY-MM-DD Event : Removed 2 mm of snow from antenna dome 10.26 Date : 2010-01-28/CCYY-MM-DD Event : Removed 3 mm of snow from antenna choke rings : and 2 mm of snow from center dome 10.27 Date : 2010-02-08/CCYY-MM-DD Event : Removed 4 mm of snow from antenna choke rings : and trace amount from center dome 10.28 Date : 2010-09-06/CCYY-MM-DD Event : Removed 4 cm of snow from antenna choke rings 10.29 Date : 2010-09-15/CCYY-MM-DD Event : Removed 3 cm of snow from antenna choke rings 10.30 Date : 2011-03-16/CCYY-MM-DD Event : Removed 3 cm of snow from antenna choke rings 10.31 Date : 2011-04-28/CCYY-MM-DD Event : Removed 1 cm of snow from antenna choke rings 10.x Date : (CCYY-MM-DD/CCYY-MM-DD) Event : (TREE CLEARING/CONSTRUCTION/etc) 11. On-Site, Point of Contact Agency Information Agency : NRCan/Canadian Geodetic Survey Preferred Abbreviation : NRCan/CGS Mailing Address : 588 Booth Street, Ottawa, Ontario : Canada, K1A 0Y7 Primary Contact Contact Name : CACS Operations Telephone (primary) : +1-613-860-1962 Telephone (secondary) : Fax : E-mail : geodetic.informationservices@nrcan.gc.ca Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : 12. Responsible Agency (if different from 11.) Agency : (multiple lines) Preferred Abbreviation : (A10) 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) 13. More Information Primary Data Center : CDDIS Secondary Data Center : NRCan/CGS URL for More Information : https://webapp.csrs.nrcan.gc.ca/geod/data-donnees/cacs-scca.php Hardcopy on File Site Map : Y Site Diagram : Y Horizon Mask : Y Monument Description : Y Site Pictures : Y Additional Information : Antenna Graphics with Dimensions ASH701945D_M +-------+ / + \ <-- 0.2280 L2 | + | <-- 0.2100 L1 +-----------------+-------------+-----------------+ <-- 0.2006 TCR | | | | | | | | +-+-------------------------------------------------+-+ <-- 0.1376 +-------------------+-------------+-------------------+ <-- 0.1346 BCR <-- | 0.3794 | --> | +-+ | +=====| |=====+ <-- 0.1000 BPA=ARP | | | Aluminium | | Mount | | | | +-+ | +-------------------+=====| |=====+------------------+ <-- 0.0000 BPA=ARP=MRP | | | Concrete pillar | | | ARP: Antenna Reference Point MRP: Monument Reference Point L1 : L1 Phase Center L2 : L2 Phase Center TCR: Top of Chokering BCR: Bottom of Chokering BPA: Bottom of Preamplifier