LAZK00ESP 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) : ARANZADI (geodesia@aranzadi.eus) Date Prepared : 2023-10-31 Report Type : UPDATE If Update: Previous Site Log : lazk00esp_20220408.log Modified/Added Sections : 3.29, 3.30, 11, 12, 13 1. Site Identification of the GNSS Monument Site Name : Lazkao Four Character ID : LAZK Monument Inscription : IERS DOMES Number : 19354S001 CDP Number : (A4) Monument Description : STEEL MAST Height of the Monument : 1.4 m Monument Foundation : MAST SCREW ANCHORED TO BUILDING WALL Foundation Depth : (m) Marker Description : (CHISELLED CROSS/DIVOT/BRASS NAIL/etc) Date Installed : 2005-05-16 Geologic Characteristic : (BEDROCK/CLAY/CONGLOMERATE/GRAVEL/SAND/etc) Bedrock Type : SEDIMENTARY Bedrock Condition : (FRESH/JOINTED/WEATHERED) Fracture Spacing : (0 cm/1-10 cm/11-50 cm/51-200 cm/over 200 cm) Fault zones nearby : NO Distance/activity : (multiple lines) Additional Information : The monument is on the roof of the : Lazkao Town Hall : built during the 17th century : Antenna is approximately 13m above ground level 2. Site Location Information City or Town : Lazkao State or Province : Gipuzkoa Country : Spain Tectonic Plate : EURASIAN Approximate Position (ITRF) X coordinate (m) : 4666098.625 Y coordinate (m) : -178186.374 Z coordinate (m) : 4330463.280 Latitude (N is +) : +430204.41 Longitude (E is +) : -0021112.90 Elevation (m,ellips.) : 226.4 Additional Information : (multiple lines) 3. GNSS Receiver Information 3.1 Receiver Type : LEICA GRX1200PRO Satellite System : GPS Serial Number : 456005 Firmware Version : 1.52/2.120 Elevation Cutoff Setting : 0 deg Date Installed : 2005-05-17 Date Removed : 2005-06-23 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.2 Receiver Type : LEICA GRX1200PRO Satellite System : GPS Serial Number : 456005 Firmware Version : 2.12/2.121 Elevation Cutoff Setting : 0 deg Date Installed : 2005-06-23 Date Removed : 2006-06-19 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.3 Receiver Type : LEICA GRX1200PRO Satellite System : GPS Serial Number : 456005 Firmware Version : 4.03/2.122 Elevation Cutoff Setting : 0 deg Date Installed : 2006-06-19 Date Removed : 2007-09-05 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.4 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS Serial Number : 350102 Firmware Version : 5.50/3.014 Elevation Cutoff Setting : 0 deg Date Installed : 2007-09-05 Date Removed : 2007-11-20 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.5 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 466005 Firmware Version : 5.50/3.014 Elevation Cutoff Setting : 0 deg Date Installed : 2007-11-20 Date Removed : 2008-11-17 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.6 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 466005 Firmware Version : 6.02/3.014 Elevation Cutoff Setting : 0 deg Date Installed : 2008-11-17 Date Removed : 2009-03-26 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.7 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 466005 Firmware Version : 7.02/3.016 Elevation Cutoff Setting : 0 deg Date Installed : 2009-03-26 Date Removed : 2009-06-10 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.8 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 466005 Firmware Version : 7.02/3.017 Elevation Cutoff Setting : 0 deg Date Installed : 2009-06-10 Date Removed : 2010-03-11 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.9 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 466005 Firmware Version : 7.80/3.018 Elevation Cutoff Setting : 0 deg Date Installed : 2010-03-11 Date Removed : 2010-05-03 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.10 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 466005 Firmware Version : 7.80/3.019 Elevation Cutoff Setting : 0 deg Date Installed : 2010-05-03 Date Removed : 2010-07-07 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.11 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 466005 Firmware Version : 8.00/3.019 Elevation Cutoff Setting : 0 deg Date Installed : 2010-07-07 Date Removed : 2011-05-18 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.12 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 466005 Firmware Version : 8.20/3.019 Elevation Cutoff Setting : 0 deg Date Installed : 2011-05-18 Date Removed : 2012-03-26 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.13 Receiver Type : LEICA GR10 Satellite System : GPS+GLO Serial Number : 1701066 Firmware Version : 2.0/4.007 Elevation Cutoff Setting : 0 deg Date Installed : 2012-03-26 Date Removed : 2012-05-08 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.14 Receiver Type : LEICA GR10 Satellite System : GPS+GLO Serial Number : 1701066 Firmware Version : 2.5/6.110 Elevation Cutoff Setting : 0 deg Date Installed : 2012-05-08 Date Removed : 2012-08-27 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.15 Receiver Type : LEICA GR10 Satellite System : GPS+GLO Serial Number : 1701066 Firmware Version : 2.62/6.112 Elevation Cutoff Setting : 0 deg Date Installed : 2012-08-27 Date Removed : 2013-04-25 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.16 Receiver Type : LEICA GR10 Satellite System : GPS+GLO Serial Number : 1701066 Firmware Version : 3.00/6.113 Elevation Cutoff Setting : 0 deg Date Installed : 2013-04-25 Date Removed : 2014-02-12 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.17 Receiver Type : LEICA GR10 Satellite System : GPS+GLO Serial Number : 1701066 Firmware Version : 3.03/6.214 Elevation Cutoff Setting : 0 deg Date Installed : 2014-02-12 Date Removed : 2015-03-06 Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.18 Receiver Type : LEICA GR10 Satellite System : GPS+GLO Serial Number : 1701066 Firmware Version : 3.11/6.403 Elevation Cutoff Setting : 0 deg Date Installed : 2015-03-06 Date Removed : 2015-09-04T12:00Z Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.19 Receiver Type : LEICA GR10 Satellite System : GPS+GLO Serial Number : 1701066 Firmware Version : 3.21/6.403 Elevation Cutoff Setting : 0 deg Date Installed : 2015-09-04T14:00Z Date Removed : 2015-11-03T11:00Z Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : Firmware updated 3.20 Receiver Type : LEICA GR10 Satellite System : GPS+GLO+GAL+BDS+SBAS Serial Number : 1701066 Firmware Version : 3.22/6.521 Elevation Cutoff Setting : 0 deg Date Installed : 2015-11-03T11:00Z Date Removed : 2016-04-07T00:00Z Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : Firmware updated 3.21 Receiver Type : LEICA GR10 Satellite System : GPS+GLO+GAL+BDS+SBAS Serial Number : 1701066 Firmware Version : 3.22/6.522 Elevation Cutoff Setting : 0 deg Date Installed : 2016-04-07T00:00Z Date Removed : 2016-06-06T10:00Z Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : Firmware updated 3.22 Receiver Type : LEICA GR10 Satellite System : GPS+GLO+GAL+BDS+SBAS Serial Number : 1701066 Firmware Version : 4.00/6.522 Elevation Cutoff Setting : 0 deg Date Installed : 2016-06-06T10:00Z Date Removed : 2016-11-21T12:00Z Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.23 Receiver Type : LEICA GR10 Satellite System : GPS+GLO+GAL+BDS+SBAS Serial Number : 1701066 Firmware Version : 4.02/6.522 Elevation Cutoff Setting : 0 deg Date Installed : 2016-11-21T12:00Z Date Removed : 2017-02-27T08:08Z Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : Firmware updated 3.24 Receiver Type : LEICA GR10 Satellite System : GPS+GLO+GAL+BDS+SBAS Serial Number : 1701066 Firmware Version : 4.11/6.523 Elevation Cutoff Setting : 0 deg Date Installed : 2017-02-27T08:08Z Date Removed : 2018-03-13T10:30Z Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : Firmware updated 3.25 Receiver Type : LEICA GR10 Satellite System : GPS+GLO+GAL+BDS+SBAS Serial Number : 1701066 Firmware Version : 4.20/6.524 Elevation Cutoff Setting : 0 deg Date Installed : 2018-03-13T10:30Z Date Removed : 2019-07-17T08:00Z Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : Firmware updated 3.26 Receiver Type : LEICA GR10 Satellite System : GPS+GLO+GAL+BDS+SBAS Serial Number : 1701976 Firmware Version : 4.20/6.524 Elevation Cutoff Setting : 0 deg Date Installed : 2019-07-17T08:00Z Date Removed : 2019-07-24T07:00Z Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : Receiver replaced by another Leica GR10 3.27 Receiver Type : LEICA GR30 Satellite System : GPS+GLO+GAL+BDS+SBAS Serial Number : 1701066 Firmware Version : 4.31/7.300 Elevation Cutoff Setting : 0 deg Date Installed : 2019-07-24T07:00Z Date Removed : 2021-05-21T09:30Z Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : GR10 receiver replaced by GR30 3.28 Receiver Type : LEICA GR30 Satellite System : GPS+GLO+GAL+BDS+SBAS Serial Number : 1701066 Firmware Version : 4.31/7.403 Elevation Cutoff Setting : 0 deg Date Installed : 2021-05-21T09:30Z Date Removed : 2022-02-02T10:20Z Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.29 Receiver Type : LEICA GR30 Satellite System : GPS+GLO+GAL+BDS+SBAS Serial Number : 1701066 Firmware Version : 4.52/7.711 Elevation Cutoff Setting : 0 deg Date Installed : 2022-02-02T10:20Z Date Removed : 2023-10-27T11:00Z Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : FW updated 3.30 Receiver Type : LEICA GR30 Satellite System : GPS+GLO+GAL+BDS+SBAS Serial Number : 1701066 Firmware Version : 4.70/7.813 Elevation Cutoff Setting : (deg) Date Installed : 2023-10-27T11:00Z Date Removed : CCYY-MM-DDThh:mmZ Temperature Stabiliz. : (deg C) +/- (deg C) Additional Information : (multiple lines) 3.x Receiver Type : (A20, from rcvr_ant.tab; see instructions) Satellite System : (GPS+GLO+GAL+BDS+QZSS+IRNSS+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 : 102857 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 deg Antenna Radome Type : LEIS Radome Serial Number : Unknown Antenna Cable Type : Leica Antenna Cable Length : 30 m Date Installed : 2005-05-17 Date Removed : 2007-09-05 Additional Information : (multiple lines) 4.2 Antenna Type : LEIAT504 LEIS Serial Number : n/a 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 deg Antenna Radome Type : LEIS Radome Serial Number : Unknown Antenna Cable Type : Leica Antenna Cable Length : 30 m Date Installed : 2007-09-05 Date Removed : 2007-11-20 Additional Information : (multiple lines) 4.3 Antenna Type : LEIAT504GG LEIS Serial Number : 102857 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 deg Antenna Radome Type : LEIS Radome Serial Number : Unknown Antenna Cable Type : Leica Antenna Cable Length : 30 m Date Installed : 2007-11-20 Date Removed : 2012-03-26 Additional Information : (multiple lines) 4.4 Antenna Type : LEIAR25.R4 LEIT Serial Number : 725365 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 deg Antenna Radome Type : LEIT Radome Serial Number : Unknown Antenna Cable Type : Leica Antenna Cable Length : 30 m Date Installed : 2012-03-26 Date Removed : CCYY-MM-DDThh:mmZ Additional Information : SECO Leveling Mount added 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 : 2005-05-17/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 8.1.1 Humidity Sensor Model : PAROSCIENTIFIC MET3 Manufacturer : PAROSCIENTIFIC Serial Number : DQ 93126 Data Sampling Interval : 600 sec Accuracy (% rel h) : 2 % rel h Aspiration : UNASPIRATED Height Diff to Ant : -0.3 m Calibration date : 2009-04-23 Effective Dates : 2006-01-04/CCYY-MM-DD Notes : (multiple lines) 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) 8.2.1 Pressure Sensor Model : PAROSCIENTIFIC MET3 Manufacturer : PAROSCIENTIFIC Serial Number : DQ 93126 Data Sampling Interval : 600 sec Accuracy : 0.08 hPa Height Diff to Ant : -0.3 m Calibration date : 2009-04-23 Effective Dates : 2006-01-04/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) 8.3.1 Temp. Sensor Model : PAROSCIENTIFIC MET3 Manufacturer : PAROSCIENTIFIC Serial Number : DQ 93126 Data Sampling Interval : 600 sec Accuracy : 0.5 deg C Aspiration : UNASPIRATED Height Diff to Ant : 0.3 m Calibration date : 2009-04-23 Effective Dates : 2006-01-04/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.x Date : (CCYY-MM-DD/CCYY-MM-DD) Event : (TREE CLEARING/CONSTRUCTION/etc) 11. On-Site, Point of Contact Agency Information Agency : ARANZADI Society of Sciences : Department of Applied Geodesy Preferred Abbreviation : ARA Mailing Address : Zorroagagaina 11 : 20018 SAN SEBASTIÁN : Spain Primary Contact Contact Name : ARANZADI Telephone (primary) : Telephone (secondary) : Fax : E-mail : geodesia@aranzadi.eus Secondary Contact Contact Name : Mr. Aitor Aginaga Telephone (primary) : +34 943 46 61 42 Telephone (secondary) : Fax : E-mail : aitoraguinaga@gmail.com Additional Information : (multiple lines) 12. Responsible Agency (if different from 11.) Agency : Gipuzkoako Foru Aldundia - Diputación Foral de : Gipuzkoa : Department of Mobility and Planning Preferred Abbreviation : GFA Mailing Address : Plaza Julio Caro Baroja 2 : 20.018 Donostia - San Sebastián : Spain Primary Contact Contact Name : GFA GNSS Telephone (primary) : Telephone (secondary) : Fax : E-mail : liz@gipuzkoa.eus Secondary Contact Contact Name : Mikelo Elorza Telephone (primary) : Telephone (secondary) : Fax : E-mail : melorza@gipuzkoa.net Additional Information : (multiple lines) 13. More Information Primary Data Center : GFA-DFG Secondary Data Center : URL for More Information : http://b5m.gipuzkoa.net/web5000/en/geodesy/ 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 LEIAT504 +-------+ <-- 0.1393 / + \ <-- 0.1282 L2 | + | <-- 0.1093 L1 +-----------------+-------------+------------------+ <-- 0.1020 TCR | | | | | | | | +-+--------------------------------------------------+-+ <-- 0.0380 +-------------------+-------------+--------------------+ <-- 0.1020 BCR | | | | +------x------+ <-- 0.0000 BPA=ARP <-- 0.3794 --> LEIAT504GG LEIS L1/L2 choke ring, using DM T style NGS ( 2) 06/11/29 2.2 2.3 85.4 0.0 -0.4 -1.2 -2.6 -4.2 -5.8 -7.4 -8.6 -9.5 -9.7 -9.5 -8.6 -7.2 -5.2 -2.5 0.6 4.7 0.0 0.0 0.1 0.2 115.9 0.0 0.1 -0.2 -0.8 -1.4 -2.3 -3.1 -3.9 -4.6 -5.0 -5.0 -4.6 -3.7 -2.4 -0.8 1.0 3.2 0.0 0.0 LEIAT504GG +-------+ <-- 0.1393 / + \ <-- 0.1282 L2 | + | <-- 0.1093 L1 +-----------------+-------------+------------------+ <-- 0.1012 TCR | | | | | | | | +-+--------------------------------------------------+-+ +-------------------+-------------+--------------------+ <-- 0.0345 BCR | | | | +------x------+ <-- 0.000 BPA=ARP <-- 0.3794 --> LEIAR25.R4 +-------+ <-- 0.1995 / \ +---+-------------+---+ <-- 0.1606 TCR | | |---------------------------| |---------------------------------| |---------------------------------------| +---------------------------------------------+ | | | | +-+---------------------------------------------+-+ +-----------------+-------------+-----------------+ <-- 0.0320 BCR | | | | +------x------+ <-- 0.0000 BPA=ARP (5/8' thread might differ from BPA!) <-- 0.3802 --> ARP: Antenna Reference Point L1 : L1 Phase Center L2 : L2 Phase Center TCR: Top of Chokering BCR: Bottom of Chokering BPA: Bottom of Preamplifier