HMLK00USA Site Information Form MIDT Continuously Operating Reference Station See Instructions at: https://files.igs.org/pub/station/general/sitelog_instr.txt 0. Form Prepared by (full name) : Don Haw Date Prepared : 2024-03-21 Report Type : UPDATE If Update: Previous Site Log : hmlk_20231020.log Modified/Added Sections : 3.12 1. Site Identification of the GNSS Monument Site Name : Hemlock Four Character ID : HMLK Monument Inscription : NONE IERS DOMES Number : (A9) CDP Number : (A4) Monument Description : PILLAR Height of the Monument : 1.52 m Monument Foundation : POURED CONCRETE CYLINDER Foundation Depth : 3.66 m Marker Description : ALUMINUM MONUMENT CAP Date Installed : 2004-03-15T00:00Z Geologic Characteristic : (BEDROCK/CLAY/CONGLOMERATE/GRAVEL/SAND/etc) Bedrock Type : (IGNEOUS/METAMORPHIC/SEDIMENTARY) Bedrock Condition : (FRESH/JOINTED/WEATHERED) Fracture Spacing : (1-10 cm/11-50 cm/51-200 cm/over 200 cm) Fault zones nearby : NO Distance/activity : (multiple lines) Additional Information : The base of the monument is a 2-ft diameter by : 12-ft deep concrete cylinder and extending : 5-ft above the ground surface, internally a : steel rebar cage re-inforced from top to : bottom. 2. Site Location Information City or Town : Hemlock State or Province : Michigan Country : UNITED STATES Tectonic Plate : North American Approximate Position (ITRF) X coordinate (m) : 465969.595 Y coordinate (m) : -4617332.213 Z coordinate (m) : 4360934.963 Latitude (N is +) : +432441.11 Longitude (E is +) : -0841414.51 Elevation (m,ellips.) : 170.4 Additional Information : ARP IGS08 POSITION (EPOCH 2005.00) : Computed in Aug 2011 using data through gpswk : 1631. 3. GNSS Receiver Information 3.1 Receiver Type : LEICA RS500 Satellite System : GPS Serial Number : 12211 Firmware Version : 4.20 Elevation Cutoff Setting : (deg) Date Installed : 2004-05-07 Date Removed : 2005-09-21T17:00Z Temperature Stabiliz. : 20 C Additional Information : (multiple lines) 3.2 Receiver Type : LEICA GRX1200PRO Satellite System : GPS Serial Number : 453654 Firmware Version : 2.14 Elevation Cutoff Setting : 10 deg Date Installed : 2005-09-21T17:00Z Date Removed : 2007-09-11T04:00Z Temperature Stabiliz. : 20 C Additional Information : Receiver upgrade : edited serial number 3.3 Receiver Type : LEICA GRX1200PRO Satellite System : GPS Serial Number : 458984 Firmware Version : 5.00/2.125 Elevation Cutoff Setting : 10 deg Date Installed : 2007-09-11T04:00Z Date Removed : 2008-10-30T18:39Z Temperature Stabiliz. : 20 C Additional Information : firmware updated 3.4 Receiver Type : LEICA GRX1200PRO Satellite System : GPS Serial Number : 458984 Firmware Version : 5.00/2.125 Elevation Cutoff Setting : 0 deg Date Installed : 2008-10-30T18:39Z Date Removed : 2009-05-09T04:00Z Temperature Stabiliz. : 20 C Additional Information : 0� cutoff changed 3.5 Receiver Type : LEICA GRX1200PRO Satellite System : GPS Serial Number : 458984 Firmware Version : 7.50/2.125 Elevation Cutoff Setting : 0 deg Date Installed : 2009-05-09T04:00Z Date Removed : 2012-12-14T04:00Z Temperature Stabiliz. : 20 C Additional Information : firmware updated 3.6 Receiver Type : LEICA GRX1200PRO Satellite System : GPS Serial Number : 458984 Firmware Version : 7.50/2.127 Elevation Cutoff Setting : 0 deg Date Installed : 2012-12-14T04:00Z Date Removed : 2014-08-25T15:07Z Temperature Stabiliz. : 20 C Additional Information : firmware updated : Receiver ended and was upgraded and : went to FRTG. 3.7 Receiver Type : LEICA GRX1200+GNSS Satellite System : GPS+GLO Serial Number : 458980 Firmware Version : 8.71/6.212 Elevation Cutoff Setting : 0 deg Date Installed : 2014-08-25T15:08Z Date Removed : 2017-07-07T11:32Z Temperature Stabiliz. : 20 C Additional Information : Receiver changed. Upgraded to GNSS. : 07-JUL-2017 firmware update, GAL included 3.8 Receiver Type : LEICA GRX1200+GNSS Satellite System : GPS+GLO+GAL Serial Number : 458980 Firmware Version : 9.20/6.405 Elevation Cutoff Setting : 0 deg Date Installed : 2017-07-07T12:22Z Date Removed : 2020-11-16T17:49Z Temperature Stabiliz. : 20 C Additional Information : (multiple lines) 3.9 Receiver Type : LEICA GRX1200+GNSS Satellite System : GPS+GLO+GAL+BDS Serial Number : 458980 Firmware Version : 9.20/6.407 Elevation Cutoff Setting : 0 deg Date Installed : 2020-11-16T18:08Z Date Removed : 2022-12-01T15:28Z Temperature Stabiliz. : 20 C Additional Information : Updated firmware. Add BDS. 3.10 Receiver Type : LEICA GR50 Satellite System : GPS+GLO+GAL+BDS Serial Number : 1870978 Firmware Version : 4.60/7.811 Elevation Cutoff Setting : 0 deg Date Installed : 2022-12-01T15:28Z Date Removed : 2023-10-19T14:21Z Temperature Stabiliz. : 20 C Additional Information : new receiver 3.11 Receiver Type : LEICA GR50 Satellite System : GPS+GLO+GAL+BDS Serial Number : 1830229 Firmware Version : 4.70/7.813 Elevation Cutoff Setting : 0 deg Date Installed : 2023-10-19T14:21Z Date Removed : 2024-03-12T16:30Z Temperature Stabiliz. : 20 C Additional Information : new receiver and firmware 3.12 Receiver Type : LEICA GR50 Satellite System : GPS+GLO+GAL+BDS Serial Number : 1830229 Firmware Version : 4.80/7.900 Elevation Cutoff Setting : 0 deg Date Installed : 2024-03-12T16:30Z Date Removed : (CCYY-MM-DDThh:mmZ) Temperature Stabiliz. : 20 C Additional Information : new firmware 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 : LEIAT504 LEIS Serial Number : 102048 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 Antenna Radome Type : LEIS Radome Serial Number : NONE Antenna Cable Type : MICROWAVE SYSTEMS LMR-400-DB Antenna Cable Length : (m) Date Installed : 2004-05-07 Date Removed : 2005-08-05 Additional Information : The antenna is designed after the Dorne-Margolin : type. The antenna is atop an 16-ft high spun : aluminum 6-in diameter pole with vertical : support braces titled an "Earlconic". 4.2 Antenna Type : LEIAT504 LEIS Serial Number : 102370 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 Antenna Radome Type : LEIS Radome Serial Number : NONE Antenna Cable Type : MICROWAVE SYSTEMS LMR-400-DB Antenna Cable Length : (m) Date Installed : 2005-08-05 Date Removed : 2014-08-25T15:07Z Additional Information : Replacement was perfomed by : Richard R. Sauve II, PhD., BS : (Leica Geosystems, Inc) on 15 August 05. : Original Phase center positioning of the : antenna was performed and varified : with two methods: : 1.) Disto Observation from top of concrete : (base of 16 ft) monument to definable point : on the bottom of the AT504 to be replaced. : 2.) DNA10 Observation before and after : (DNA10 was positioned on a gravel pile situated : approximately 70 feet away from the mark and : enabled a digital level observation difference : to be measured from the base of the 16' pole : and the bottom of the AT504 (with rod inverted) : both before the original antenna was removed and : after the new antenna was replaced. : Differences indicated below: : 1.) Before antenna was removed: -3.6521 m : 2.) After antenna was replaced: -3.6530 m : The vertical component of the replacement : antenna is within 1mm of the original : (The least reading of the DNA10). 4.3 Antenna Type : LEIAT504 LEIS Serial Number : 102370 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 Antenna Radome Type : LEIS Radome Serial Number : NONE Antenna Cable Type : MICROWAVE SYSTEMS LMR-400-DB Antenna Cable Length : (m) Date Installed : 2014-08-25T15:08Z Date Removed : 2018-11-28T17:00Z Additional Information : In-situ preamp upgrade to LEIAT504GG for GNSS : capability. No physical changes in chokering - : same serial number. No noticeable positional : jump was detected using LEIAT504 pattern thus : antenna name stays the same until further notice : 2018-NOV-28 antenna cable replaced 4.4 Antenna Type : LEIAT504 LEIS Serial Number : 102370 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 Antenna Radome Type : LEIS Radome Serial Number : NONE Antenna Cable Type : MICROWAVE SYSTEMS LMR-400-DB Antenna Cable Length : 121.92 m Date Installed : 2018-11-28T17:55Z Date Removed : 2020-08-04T16:08Z Additional Information : (multiple lines) 4.5 Antenna Type : LEIAR20 LEIM Serial Number : 19067005 Antenna Reference Point : BAM 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 Antenna Radome Type : LEIM Radome Serial Number : NONE Antenna Cable Type : MICROWAVE SYSTEMS LMR-400-DB Antenna Cable Length : 121.92 m Date Installed : 2020-08-04T16:22Z Date Removed : (CCYY-MM-DDThh:mmZ) Additional Information : Upgraded Antenna. 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 : (if external) Effective Dates : 2004-05-07/CCYY-MM-DD Notes : (multiple lines) 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.x Other Instrumentation : (multiple lines) 9. Local Ongoing Conditions Possibly Affecting Computed Position 9.1.x Radio Interference : (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/BUILDLINGS/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 : Michigan DOT Preferred Abbreviation : MIDOT Mailing Address : 425 West Ottawa : P.O. Box 30050 : Lansing, MI 48909 Primary Contact Contact Name : Shawn E. Roy P.S. Telephone (primary) : 517-335-6299 Telephone (secondary) : Fax : 517-335-2731 E-mail : roys@michigan.gov Secondary Contact Contact Name : Joel Bigelow Telephone (primary) : 517-335-4353 Telephone (secondary) : Fax : E-mail : BigelowJ2@michigan.gov Additional Information : (multiple lines) 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 : https://geodesy.noaa.gov/corsdata/ Secondary Data Center : URL for More Information : https://geodesy.noaa.gov/CORS Hardcopy on File Site Map : (Y or URL) Site Diagram : (Y or URL) Horizon Mask : (Y or URL) Monument Description : (Y or URL) Site Pictures : (Y or URL) Additional Information : (multiple lines) Antenna Graphics with Dimensions https://files.igs.org/pub/station/general/antenna.gra