HOLB Site Information Form International GNSS Service See Instructions at: ftp://igscb.jpl.nasa.gov/pub/station/general/sitelog_instr.txt 0. Form Prepared by (full name) : Lisa Nykolaishen Date Prepared : 2009-03-06 Report Type : UPDATE If Update: Previous Site Log : holb_20081126.log Modified/Added Sections : 2006-03-01: - 1.0, 4.1-4.6, 13.0, : - Antenna Diagram D : 2007-01-11: - added 3.14; 4.7 : 2008-06-25: - 3.11 - corrected f/w date : - added 3.15 - new receiver : installed 2007-03-06; : - added current section 6.2 as : information was lost during : format change - renamed subsequent : sections : - 3.x - selected Satellite System; : added comments; : - 3.7-3.10 - inserted Elevation Cutoff : setting; : - 3.8 - corrected firmware link date; : - 3.10,3.12,4.5,4.6 - corrected : installation/removal times; : - 4.6,4.7 - relocated radome serial : number from antenna serial number : line to appropriate location; : - 7.2 - inserted effective start : date of repeat abs. grav. observations; : 2008-11-26: - added 4.8; : 2009-03-06: - added 3.16, receiver replaced; 1. Site Identification of the GNSS Monument Site Name : Holberg Four Character ID : HOLB Monument Inscription : 927005 IERS DOMES Number : 40130M001 CDP Number : (A4) Monument Description : CONCRETE PIER, 60cm DIAMETER Height of the Monument : 1M Monument Foundation : RE-ENFORCED STEEL IN BEDROCK Foundation Depth : 0.5m Marker Description : BRASS PLATE; FORCED CENTER STAINLESS STEEL : BOLT Date Installed : 1992-07-24 Geologic Characteristic : BEDROCK Bedrock Type : IGNEOUS/METAMORPHIC Bedrock Condition : WEATHERED Fracture Spacing : over 200 cm Fault zones nearby : Cascadia Subduction Zone, Nootka Fault Distance/activity : Additional Information : This station is part of the Western Canada : Deformation Array (WCDA) as well as the : Canadian Active Control System (CACS). : ******************************************** : The GPS reference mark consists of a brass : plate with a forced centered stainless steel : bolt. : The brass plate is embedded on top of a 1.0 : metre high concrete pier, 60 cm in diameter. : The concrete pier is anchored to exposed : bedrock using steel re-enforcement bars to a : depth of 0.5 m. The antenna is attached to : the brass forced centered plate via a 10 cm : high anodized aluminum base. : This base provides a constant height : above the brass plate and also permits : the antenna to be referenced to north. : **file audited as of 2008-06-25 2. Site Location Information City or Town : Holberg State or Province : B.C. Country : Canada Tectonic Plate : North America Approximate Position (ITRF) X coordinate (m) : -2503040.4240 Y coordinate (m) : -3188233.3250 Z coordinate (m) : 4908701.5430 Latitude (N is +) : +503825.44 Longitude (E is +) : -1280806.00 Elevation (m,ellips.) : +560.0 Additional Information : ~40km west of Port Hardy, at the northern : tip of Vancouver Is. 3. GNSS Receiver Information 3.1 Receiver Type : ROGUE SNR-8C Satellite System : GPS Serial Number : 313 Firmware Version : Meenix (SNR-8C) Elevation Cutoff Setting : (deg) Date Installed : 1992-07-24T20:40Z Date Removed : 1992-09-07T22:00Z Temperature Stabiliz. : none Additional Information : Hardware failure 3.2 Receiver Type : ROGUE SNR-800 Satellite System : GPS Serial Number : 203 Firmware Version : Meenix (SNR-800) Elevation Cutoff Setting : (deg) Date Installed : 1992-09-07T22:00Z Date Removed : 1993-02-02T03:00Z Temperature Stabiliz. : none Additional Information : New Receiver 3.3 Receiver Type : ROGUE SNR-800 Satellite System : GPS Serial Number : 203 Firmware Version : Meenix 7.3 Elevation Cutoff Setting : (deg) Date Installed : 1993-02-02T03:00Z Date Removed : 1993-06-24T21:09Z Temperature Stabiliz. : none Additional Information : Firmware upgrade 3.4 Receiver Type : ROGUE SNR-800 Satellite System : GPS Serial Number : 203 Firmware Version : Meenix 7.4 Elevation Cutoff Setting : (deg) Date Installed : 1993-06-24T21:09Z Date Removed : 1993-10-27T05:29Z Temperature Stabiliz. : none Additional Information : Firmware upgrade 3.5 Receiver Type : ROGUE SNR-8C Satellite System : GPS Serial Number : 312 Firmware Version : Meenix 7.3 AOA fix Elevation Cutoff Setting : (deg) Date Installed : 1993-10-27T05:29Z Date Removed : 1994-05-03T20:18Z Temperature Stabiliz. : none Additional Information : Switch back to MiniRogue 3.6 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : 309 Firmware Version : 2.8.32.1 lk 93/08/27 Elevation Cutoff Setting : (deg) Date Installed : 1994-05-03T20:18Z Date Removed : 1996-03-29T01:40Z Temperature Stabiliz. : none Additional Information : New Receiver + firmware 3.7 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : 332 Firmware Version : 3.2 lk 95/03/09 Elevation Cutoff Setting : 10 Date Installed : 1996-03-29T01:40Z Date Removed : 1999-01-06T18:03Z Temperature Stabiliz. : none Additional Information : New Receiver + firmware 3.8 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : 292 Firmware Version : 3.2 lk 95/03/09 Elevation Cutoff Setting : 10 Date Installed : 1999-01-07T00:40Z Date Removed : 1999-01-29T22:45Z Temperature Stabiliz. : none Additional Information : New Receiver 3.9 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : 332 Firmware Version : 3.2 lk 95/03/09 Elevation Cutoff Setting : 10 Date Installed : 1999-02-11T00:00Z Date Removed : 1999-05-18T21:50Z Temperature Stabiliz. : none Additional Information : New Receiver : Receiver removed : receiver malfunctioned 09-MAR-1999 3.10 Receiver Type : AOA SNR-8000 ACT Satellite System : GPS Serial Number : T292-U Firmware Version : 3.3.32.2 lk 99/02/01 Elevation Cutoff Setting : 10 Date Installed : 1999-05-19T21:35Z Date Removed : 2001-03-21T17:30Z Temperature Stabiliz. : none Additional Information : New Receiver : Rcvr T292-U is the upgraded 292 : RF surge suppressor installed at receiver 3.11 Receiver Type : AOA SNR-8000 ACT Satellite System : GPS Serial Number : T292-U Firmware Version : 3.3.32.4x lk 00/03/08 Elevation Cutoff Setting : (deg) Date Installed : 2001-03-21T17:45Z Date Removed : 2002-01-02T17:30Z Temperature Stabiliz. : none Additional Information : Firmware upgrade 3.12 Receiver Type : LEICA CRS1000 Satellite System : GPS Serial Number : 30174 Firmware Version : 80.05 4.42 1.26 1.20 Elevation Cutoff Setting : (deg) Date Installed : 2002-01-23T02:16Z Date Removed : 2002-05-15T15:13Z Temperature Stabiliz. : none Additional Information : New RF antenna cable installed 3.13 Receiver Type : LEICA CRS1000 Satellite System : GPS Serial Number : 30199 Firmware Version : 9.00 4.42 1.26 1.20 Elevation Cutoff Setting : (deg) Date Installed : 2002-05-15T15:27Z Date Removed : 2006-11-20T02:00Z Temperature Stabiliz. : none Additional Information : New Receiver + Firmware 3.14 Receiver Type : LEICA CRS1000 Satellite System : GPS Serial Number : 23163 Firmware Version : 9.00 4.42 1.26 1.20 Elevation Cutoff Setting : 5 Date Installed : 2007-01-11T20:00Z Date Removed : 2007-03-06T17:34Z Temperature Stabiliz. : none Additional Information : New Receiver 3.15 Receiver Type : LEICA CRS1000 Satellite System : GPS Serial Number : 30035 Firmware Version : 9.00 4.42 1.26 1.20 Elevation Cutoff Setting : 5 Date Installed : 2007-03-06T17:46Z Date Removed : 2009-03-06T19:49Z Temperature Stabiliz. : none Additional Information : New Receiver 3.16 Receiver Type : LEICA GRX1200PRO Satellite System : GPS Serial Number : 459347 Firmware Version : 6.0 Elevation Cutoff Setting : 5 Date Installed : 2009-03-06T20:01Z Date Removed : (CCYY-MM-DDThh:mmZ) Temperature Stabiliz. : none Additional Information : New Receiver 3.x Receiver Type : (A20, from rcvr_ant.tab; see instructions) Satellite System : (GPS/GLONASS/GPS+GLONASS) Serial Number : (A5) 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_B EMRA Serial Number : 91120 Antenna Reference Point : BCR Marker->ARP Up Ecc. (m) : 0.129 Marker->ARP North Ecc(m) : (F8.4) Marker->ARP East Ecc(m) : (F8.4) Alignment from True N : 0 Antenna Radome Type : EMRA Radome Serial Number : Antenna Cable Type : Andrew FSJ4-50B Antenna Cable Length : 120m Date Installed : 1992-07-24T20:40Z Date Removed : 1994-05-03T20:18Z Additional Information : ref. Antenna Diagram 'A' below : The dome is installed using an aluminum : flange ring attached to the choke ring. : The flange ring extends the radius of the : ground plane by 2.5 cm. 4.2 Antenna Type : AOAD/M_T EMRA Serial Number : 94383 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0055 Marker->ARP North Ecc(m) : (F8.4) Marker->ARP East Ecc(m) : (F8.4) Alignment from True N : 0 Antenna Radome Type : EMRA Radome Serial Number : Antenna Cable Type : Andrew FSJ4-50B Antenna Cable Length : 120m Date Installed : 1994-05-03T20:18Z Date Removed : 1996-03-29T01:40Z Additional Information : ref. Antenna Diagram 'B' below : Antenna p/n 7490400-4 : The dome is installed using an aluminum : flange ring attached to the choke ring. : The flange ring extends the radius of the : ground plane by 2.5 cm. 4.3 Antenna Type : AOAD/M_T EMRA Serial Number : 95160 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.100 Marker->ARP North Ecc(m) : (F8.4) Marker->ARP East Ecc(m) : (F8.4) Alignment from True N : 0 Antenna Radome Type : EMRA Radome Serial Number : Antenna Cable Type : Andrew FSJ4-50B Antenna Cable Length : 120m Date Installed : 1996-03-29T01:40Z Date Removed : 1999-01-06T18:03Z Additional Information : ref. Antenna Diagram 'C' below; : Antenna p/n 7490582-1 : The dome is installed using an aluminum : flange ring attached to the choke ring. : The flange ring extends the radius of the : ground plane by 2.5 cm. : Note addition of "RF" screening skirt. : 10cm spacer installed. 4.4 Antenna Type : AOAD/M_T EMRA Serial Number : 98381 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.100 Marker->ARP North Ecc(m) : (F8.4) Marker->ARP East Ecc(m) : (F8.4) Alignment from True N : 0 Antenna Radome Type : EMRA Radome Serial Number : Antenna Cable Type : Andrew FSJ4-50B Antenna Cable Length : 120m Date Installed : 1999-01-07T00:40Z Date Removed : 1999-05-19T21:35Z Additional Information : ref. Antenna Diagram 'C' below; : Antenna p/n 7490582-2 : The dome is installed using an aluminum : flange ring attached to the choke ring. : The flange ring extends the radius of the : ground plane by 2.5 cm. 4.5 Antenna Type : AOAD/M_T EMRA Serial Number : 92168 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.100 Marker->ARP North Ecc(m) : (F8.4) Marker->ARP East Ecc(m) : (F8.4) Alignment from True N : 0 Antenna Radome Type : EMRA Radome Serial Number : Antenna Cable Type : Andrew FSJ4-50B Antenna Cable Length : 120m Date Installed : 1999-05-19T21:35Z Date Removed : 2002-01-23T00:30Z Additional Information : ref. Antenna Diagram 'C' below; : Antenna p/n 7490582-2 : The dome is installed using an aluminum : flange ring attached to the choke ring. : The flange ring extends the radius of the : ground plane by 2.5 cm. : RF surge suppressor installed at antenna 4.6 Antenna Type : LEIAT504 SCIS Serial Number : 00724 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.100 Marker->ARP North Ecc(m) : (F8.4) Marker->ARP East Ecc(m) : (F8.4) Alignment from True N : 0 Antenna Radome Type : SCIS Radome Serial Number : 00023 Antenna Cable Type : Andrew FSJ4-50B Antenna Cable Length : 120m Date Installed : 2002-01-23T02:16Z Date Removed : 2006-11-20T02:00Z Additional Information : ref. Antenna Diagram 'D' below; : Antenna p/n 10839ASY : New RF antenna cable installed 4.7 Antenna Type : LEIAT504 SCIS Serial Number : 00732 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.100 Marker->ARP North Ecc(m) : (F8.4) Marker->ARP East Ecc(m) : (F8.4) Alignment from True N : 0 Antenna Radome Type : SCIS Radome Serial Number : 00023 Antenna Cable Type : Andrew FSJ4-50B Antenna Cable Length : 120m Date Installed : 2007-01-11T20:00Z Date Removed : 2008-08-01T23:00Z Additional Information : ref. Antenna Diagram 'D' below; : Antenna p/n 10839ASY; 4.8 Antenna Type : LEIAT504 SCIS Serial Number : 00732 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.100 Marker->ARP North Ecc(m) : (F8.4) Marker->ARP East Ecc(m) : (F8.4) Alignment from True N : 0 Antenna Radome Type : SCIS Radome Serial Number : 00023 Antenna Cable Type : Andrew FSJ4-50B Antenna Cable Length : 120m Date Installed : 2008-08-01T23:00Z Date Removed : (CCYY-MM-DDThh:mmZ) Additional Information : ref. Antenna Diagram 'D' below; : Antenna p/n 10839ASY; : New RF antenna cable installed; previous : cable damaged, suspect lightning strike; 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) : dy (m) : dz (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 : RUBIDIUM (HP5065A) Input Frequency : 5MHz Effective Dates : (1992-07-24T20:40Z/1993-02-23T21:33Z) Notes : 6.2 Standard Type : RUBIDIUM (AOA/EFRATOM; AOA rackmount-AC power) Input Frequency : 5MHz Effective Dates : (1993-02-23T21:33Z/1998-08-15T01:02Z) Notes : excessive drift (~ + 140 usec/day) prompted : the exchange of this clock 6.3 Standard Type : RUBIDIUM (AOA/EFRATOM; AOA) Input Frequency : 5MHz Effective Dates : (1998-08-15T01:02Z/1999-01-06T18:03Z) Notes : 6.4 Standard Type : RUBIDIUM (EFRATOM FRS-C 1ASG-4C s/n 34618) Input Frequency : 5MHz Effective Dates : (1999-01-07T00:40Z/1999-05-19T21:35Z) Notes : 6.5 Standard Type : RUBIDIUM (EFRATOM FRS-C 1ASG-4C AOA s/n 106) Input Frequency : 5MHz Effective Dates : (1999-05-19T21:35Z/2001-03-21T17:30Z) Notes : 6.6 Standard Type : INTERNAL RECEIVER CLOCK Input Frequency : n/a Effective Dates : 2001-03-21T17:30Z/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 : Seismometer (Vertical) Status : Active (On-line) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : Contact GSC for more information 7.2 Instrumentation Type : Absolute Gravity Site Status : MOBILE Effective Dates : 1995-07-31/CCYY-MM-DD Notes : Contact GSC for more 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 : (hPa) 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 : 9. Local Ongoing Conditions Possibly Affecting Computed Position 9.1.x Radio Interferences : (TV/CELL PHONE ANTENNA/RADAR/etc) Observed Degredations : (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 : Geological Survey of Canada Preferred Abbreviation : GSC Mailing Address : P.O. Box 6000 : 9860 West Saanich Rd. : Sidney, B.C. : Canada V8L 4B2 Primary Contact Contact Name : Michael Schmidt Telephone (primary) : 250-363-6760 Telephone (secondary) : 250-363-6500 Fax : 250-363-6565 E-mail : MSchmidt@nrcan.gc.ca Secondary Contact Contact Name : Herb Dragert Telephone (primary) : 250-363-6447 Telephone (secondary) : 250-363-6500 Fax : 250-363-6565 E-mail : HDragert@nrcan.gc.ca 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 : ftp://wcda.pgc.nrcan.gc.ca Secondary Data Center : none URL for More Information : http://gsc.nrcan.gc.ca/geodyn/wcda/index_e.php Hardcopy on File Site Map : (Y or URL) Site Diagram : (Y) Horizon Mask : (Y) Monument Description : (Y) Site Pictures : (Y) Additional Information : Hardcopy Information available from www site : or site contact Antenna Graphics with Dimensions Antenna Diagram A ***************** ROGUE: AOAD/M_B (Allen Osborne Design) (Not to Scale) . . . . . . . .<-- ACRYLIC DOME . ----- . (EMRA) . / + \ . <- 0.096 L2 . | + | .<- 0.078 L1 . +-----------------------------------------------+ <- 0.070 TCR . | | . . | | . . | | . . | | . . | | . ... +-------------------+------X------+------------------+ <- 0.000 ARP |======FLANGE======= | | =======RING=======| | +-------------+ | <-- -0.011 | | | | | |=> antenna mount (4 legs) | | [-----------------------------#-----------------------------] <- TOP OF [ ] CONCRETE [ ] PIER [ ] [ ] Antenna Diagram B ***************** TURBOROGUE: AOAD/M_T (Allen Osborne Design) (Not to Scale) . . . . . . . .<- ACRYLIC DOME . ----- . (EMRA) . / + \ . <- 0.128 L2 . | + | .<- 0.110 L1 . +-----------------------------------------------+ <- 0.102 TCR . | | . . | | . . | | . . | | . . +-+------------------------------------------------+-+ .<-- 0.038 ... +-------------------+-------------+------------------+ <-- 0.035 BCR |======FLANGE======= | | =======RING=======| | | +------X------+ <-- 0.000 ARP [-----------------------------#-----------------------------] <- TOP OF [ ] CONCRETE [ ] PIER [ ] [ ] Antenna Diagram C ***************** TURBOROGUE: AOAD/M_T (Allen Osborne Design) (not to scale) . . . . . . . .<- ACRYLIC DOME . ----- . (EMRA) . / + \ . <- 0.128 L2 . | + | .<- 0.110 L1 . +-----------------------------------------------+ <- 0.102 TCR . | | . . | | . . | | . . | | . . +-+------------------------------------------------+-+ . <- 0.038 ... +-------------------+-------------+------------------+ <- 0.035 BCR |======FLANGE======= | | =======RING=======| | | | | | +------X------+ <------ 0.000 ARP | | * * | | | * * | | | * * | |< metal | * * 10cm | screen | * * | |RF skirt | * * | | [--------------------------------#---------------------------------]<-TOP OF [ ]CONCRETE [ ] PIER [ ] # ... Monument Reference Point X ... Antenna Reference Point (ARP) L1 : L1 Phase Center L2 : L2 Phase Center TCR: Top of Chokering BCR: Bottom of Chokering Antenna Diagram D ***************** LEIAT504 SCIS (not to scale) . . . . . . . . . . . . . . . . <-- DOME (SCIS) . . . . . . . . . . . . +-------+ .<- 0.1393 . / + \ .<- 0.1282 L2 . | + | .<- 0.1093 L1 . +-----------------------------------------------+ .<- 0.1012 TCR . | | . . | | . . | | . . | | . . +-+------------------------------------------------+-+ . . +-------------------+-------------+------------------+ .<- 0.0345 BCR | | | | +------X------+ <----- 0.000 ARP * * | * * | * * | * * 10cm * * | * * | [---------------------*------#------*--------------------]<-TOP OF [ ]CONCRETE [ ] PIER [ ] [ ] # ... Monument Reference Point X ... Antenna Reference Point (ARP) L1 : L1 Phase Center L2 : L2 Phase Center TCR: Top of Chokering BCR: Bottom of Chokering