NLIB00USA 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) : Tatevik Shakhbandaryan Date Prepared : 2023-03-14 Report Type : UPDATE If Update: Previous Site Log : nlib_20210505.log Modified/Added Sections : 3.12,3.13 1. Site Identification of the GNSS Monument Site Name : North Liberty VLBA site Four Character ID : NLIB Monument Inscription : 4007-S North Liberty-VLBA GPS Station Mark-JPL IERS DOMES Number : 40465M001 CDP Number : Monument Description : Concrete pillar Height of the Monument : 0.465 m Monument Foundation : CONCRETE BLOCK Foundation Depth : Marker Description : Stainless steel plate Date Installed : 1993-03-05T00:00Z Geologic Characteristic : Bedrock Type : Bedrock Condition : Fracture Spacing : Fault zones nearby : Distance/activity : Additional Information : (multiple lines) : Type of Monument: 0.455 m diameter stainless : steel plate set flush in the center of a 0.610 : meter diameter concrete monolith that projects : 0.465 meters above the ground. : Monument information from "NASA Space Geodesy : Program: Catalogue of Site Information", : Technical Memorandum 4482, March 1993, p385. 2. Site Location Information City or Town : North Liberty State or Province : Iowa Country : United States Tectonic Plate : NORTH AMERICAN Approximate Position (ITRF) X coordinate (m) : -130934.4493 Y coordinate (m) : -4762291.7386 Z coordinate (m) : 4226854.6638 Latitude (N is +) : +414617.73 Longitude (E is +) : -0913429.61 Elevation (m,ellips.) : 207.0648 Additional Information : Latitude, Longitude and Elevation derived from : "IERS Technical Note 20, Results and Analysis : of the ITRF94" March 1996; Table 6 "ITRF94 : Class B Station Coordinates at Epoch 1993.0", : pT67. : NRAO VLBA station is located in east central : Iowa approximately 3 miles north of the town of : North Liberty, and 20 miles south of Cedar : Rapids. To reach the station from the North : Liberty Post Office,located at the intersection : of North Front Street and Dubuque Street, : proceed north on North Front Street 0.20 miles : to the "T" intersection on the left (west) with : Penn Street. Continue straight onto State Route : F-28 and proceed 2.0 miles to the "T" : intersection on the left (west) with County Rd : 47, a dirt road and a locked gate (obtain prior : approval from NRAO). Turn left (west) onto : County Road 47, passing through the gate and : proceed 0.2 miles to the NRAO site gate and : station. The site is enclosed by an 8 foot : chain link fence. : Site information from "NASA Space Geodesy : Program: Catalogue of Site Information", : Technical Memorandum 4482, March 1993, p383. 3. GNSS Receiver Information 3.1 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : T102 Firmware Version : 2.6-93/01/08 Elevation Cutoff Setting : 4 deg Date Installed : 1993-03-05T00:00Z Date Removed : 1993-06-15T00:00Z Temperature Stabiliz. : none Additional Information : 3.2 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : T102 Firmware Version : 2.8-93/06/08 Elevation Cutoff Setting : 4 deg Date Installed : 1993-06-15T00:00Z Date Removed : 1994-10-24T00:00Z Temperature Stabiliz. : none Additional Information : 3.3 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : T102 Firmware Version : 94/10/10-17:01:54 Elevation Cutoff Setting : 4 deg Date Installed : 1994-10-24T00:00Z Date Removed : 1999-07-09T15:00Z Temperature Stabiliz. : none Additional Information : 3.4 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : T102 Firmware Version : 3.2.32.8 Elevation Cutoff Setting : 4 deg Date Installed : 1999-07-09T15:00Z Date Removed : 1999-08-31T00:00Z Temperature Stabiliz. : none Additional Information : Firmware upgrade 3.5 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : T102 Firmware Version : 0.5 Elevation Cutoff Setting : 4 deg Date Installed : 1999-08-31T00:00Z Date Removed : 2005-03-27T23:59Z Temperature Stabiliz. : none Additional Information : Firmware update 3.6 Receiver Type : AOA SNR-12 ACT Satellite System : GPS Serial Number : R253-U Firmware Version : 3.3.32.5 Elevation Cutoff Setting : 4 deg Date Installed : 2005-04-15T00:00Z Date Removed : 2009-09-21T17:00Z Temperature Stabiliz. : none Additional Information : 3.7 Receiver Type : ASHTECH UZ-12 Satellite System : GPS Serial Number : IR2200716008 Firmware Version : CQ00 Elevation Cutoff Setting : 4 deg Date Installed : 2009-09-22T00:00Z Date Removed : 2018-06-14T14:00Z Temperature Stabiliz. : none Additional Information : 3.8 Receiver Type : SEPT POLARX5TR Satellite System : GPS+GLO+GAL+BDS Serial Number : 3013995 Firmware Version : 5.2.0 Elevation Cutoff Setting : 0 deg Date Installed : 2018-06-14T15:00Z Date Removed : 2019-09-11T18:20Z Temperature Stabiliz. : Additional Information : System is receiving 1pps and 10Mhz signal inputs 3.9 Receiver Type : SEPT POLARX5TR Satellite System : GPS+GLO+GAL+BDS Serial Number : 3013995 Firmware Version : 0.0.0-181002 Elevation Cutoff Setting : 0 deg Date Installed : 2019-09-11T18:20Z Date Removed : 2019-12-27T05:33Z Temperature Stabiliz. : Additional Information : System is receiving 1pps and 10Mhz signal inputs 3.10 Receiver Type : SEPT POLARX5TR Satellite System : GPS+GLO+GAL+BDS Serial Number : 3013995 Firmware Version : 5.3.0 Elevation Cutoff Setting : 0 deg Date Installed : 2019-12-27T05:33Z Date Removed : 2020-01-31T00:27Z Temperature Stabiliz. : Additional Information : System is receiving 1pps and 10Mhz signal inputs 3.11 Receiver Type : SEPT POLARX5TR Satellite System : GPS+GLO+GAL+BDS Serial Number : 3013995 Firmware Version : 5.3.2 Elevation Cutoff Setting : 0 deg Date Installed : 2020-01-31T00:27Z Date Removed : 2021-02-02T18:51Z Temperature Stabiliz. : Additional Information : System is receiving 1pps and 10Mhz signal inputs 3.12 Receiver Type : SEPT POLARX5TR Satellite System : GPS+GLO+GAL+BDS Serial Number : 3013995 Firmware Version : 5.4.0 Elevation Cutoff Setting : 0 deg Date Installed : 2021-02-02T18:51Z Date Removed : 2023-03-10T01:44Z Temperature Stabiliz. : Additional Information : System is receiving 1pps and 10Mhz signal inputs 3.13 Receiver Type : SEPT POLARX5TR Satellite System : GPS+GLO+GAL+BDS Serial Number : 3013995 Firmware Version : 5.5.0 Elevation Cutoff Setting : 0 deg Date Installed : 2023-03-10T01:44Z Date Removed : CCYY-MM-DDThh:mmZ Temperature Stabiliz. : Additional Information : System is receiving 1pps and 10Mhz signal inputs 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 : AOAD/M_T JPLA Serial Number : 102 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.061 Marker->ARP North Ecc(m) : 0.000 Marker->ARP East Ecc(m) : 0.000 Alignment from True N : Antenna Radome Type : JPLA Radome Serial Number : Antenna Cable Type : Antenna Cable Length : Date Installed : 1993-03-05T00:00Z Date Removed : 2009-11-16T15:00Z Additional Information : 4.2 Antenna Type : TPSCR.G3 SCIS Serial Number : 383-0154 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.2698 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.000 Alignment from True N : 0 deg Antenna Radome Type : SCIS Radome Serial Number : 1135 Antenna Cable Type : LMR 600 Antenna Cable Length : 122 m Date Installed : 2009-11-19T00:00Z Date Removed : 2010-12-14T22:00Z Additional Information : New antenna mounting hardware was added : to the monument that included a stainless : steel plate set in place of the old antenna. : A steel pipe was welded vertically : to the plate and centered over the mark. : A SCIGN antenna adapter was attached to the : pipe. : New mount installed in order to accommodate : calibrated antenna/dome combination : Horizontal offset is 2 mm due South of mark. 4.3 Antenna Type : TPSCR.G3 NONE Serial Number : 383-0154 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.6127 Marker->ARP North Ecc(m) : 0.000 Marker->ARP East Ecc(m) : 0.000 Alignment from True N : 70 deg Antenna Radome Type : NONE Radome Serial Number : N/A Antenna Cable Type : LMR 600 Antenna Cable Length : 122 m Date Installed : 2010-12-15T03:45Z Date Removed : 2010-12-15T17:51Z Additional Information : A new set of antenna mounting hardware was : installed over the mark to eliminate any : horizontal : offset. The design includes an aluminum plate : set : in place of the old antenna, a steel pipe : secured : precisely and vertically in the center of the : plate, : and a SCIGN antenna adapter threaded on to the : top of : the pipe. 4.4 Antenna Type : TPSCR.G3 SCIS Serial Number : 383-0154 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.6127 Marker->ARP North Ecc(m) : 0.000 Marker->ARP East Ecc(m) : 0.000 Alignment from True N : 70 deg Antenna Radome Type : SCIS Radome Serial Number : 1135 Antenna Cable Type : LMR 600 Antenna Cable Length : 122 m Date Installed : 2010-12-15T17:52Z Date Removed : 2010-12-15T19:14Z Additional Information : Dome installed 4.5 Antenna Type : TPSCR.G3 SCIS Serial Number : 383-0154 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.6127 Marker->ARP North Ecc(m) : 0.000 Marker->ARP East Ecc(m) : 0.000 Alignment from True N : 0 deg Antenna Radome Type : SCIS Radome Serial Number : 1135 Antenna Cable Type : LMR 600 Antenna Cable Length : 122 m Date Installed : 2010-12-15T19:15Z Date Removed : 2018-06-14T14:00Z Additional Information : Antenna oriented North 19:15 UTC. 4.6 Antenna Type : JAVRINGANT_DM SCIS Serial Number : 00841 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.6127 Marker->ARP North Ecc(m) : 0.000 Marker->ARP East Ecc(m) : 0.000 Alignment from True N : 0 deg Antenna Radome Type : SCIS Radome Serial Number : 0874 Antenna Cable Type : LMR 600 Antenna Cable Length : 122 m Date Installed : 2018-06-14T15:00Z Date Removed : CCYY-MM-DDThh:mmZ Additional Information : New calibrated antenna installed 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 5.1 Tied Marker Name : NLIB 7612 Tied Marker Usage : Tied Marker CDP Number : 7612 Tied Marker DOMES Number : 40465S001 Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : 62.2278 dy (m) : -25.3872 dz (m) : -3.6259 Accuracy (mm) : Survey method : Date Measured : (CCYY-MM-DDThh:mmZ) Additional Information : VLBA reference point 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 : EXTERNAL H-MASER Input Frequency : 5 MHz Effective Dates : 1993-03-05/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 7.1 Instrumentation Type : VLBI Status : Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : 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 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 : 2007-05-29/2007-05-30 Event : Local RFI experiments performed at site : between ~16-18 UTC on the two days above : causing loss of satellite lock. 10.x Date : (CCYY-MM-DD/CCYY-MM-DD) Event : (TREE CLEARING/CONSTRUCTION/etc) 11. On-Site, Point of Contact Agency Information Agency : National Radio Astronomy Observatory Preferred Abbreviation : NRAO Mailing Address : North Liberty Iowa VLBA Station : P.O. Box 622 : North Liberty, IA 52317 Primary Contact Contact Name : Mike Burgert Telephone (primary) : 319-626-6878 Telephone (secondary) : 319-626-6650 Fax : 319-626-3520 E-mail : mburgert@aoc.nrao.edu Secondary Contact Contact Name : DJ Beard Telephone (primary) : 319-626-6878 Telephone (secondary) : Fax : 319-626-3520 E-mail : dbeard@arana.aoc.nrao.edu Additional Information : 12. Responsible Agency (if different from 11.) Agency : Jet Propulsion Laboratory Preferred Abbreviation : JPL Mailing Address : 4800 Oak Grove Drive : Pasadena, CA : USA 91109 Primary Contact Contact Name : David A. Stowers Telephone (primary) : 818-354-7055 Telephone (secondary) : Fax : 818-393-4965 E-mail : dstowers@jpl.nasa.gov Secondary Contact Contact Name : UNAVCO Network Engineer Telephone (primary) : 303-381-7500 Telephone (secondary) : Fax : 303-381-7451 E-mail : ggn-ops@postal.unavco.org Additional Information : 13. More Information Primary Data Center : JPL Secondary Data Center : CDDIS URL for More Information : Hardcopy on File Site Map : Site Diagram : 12/94 Horizon Mask : 12/94 Monument Description : 12/94 Site Pictures : 12/94 Additional Information : Antenna Graphics with Dimensions TPSCR.G3 +-------+ / \ | | +-----------------+-------------+-----------------+ <-- 0.1015 TCR | | | | | | | | +-+-------------------------------------------------+-+ +-------------------+-------------+-------------------+ <-- 0.0345 BCR | | | | +------x------+ <-- 0.0000 BPA=ARP <-- 0.2380 --> <-- 0.3800 --> 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 All dimensions are in meters.