SOFI00BGR 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) : GOW Operator (gnss_wtz@bkg.bund.de)
Date Prepared : 2023-06-08
Report Type : UPDATE
If Update:
Previous Site Log : sofi00bgr_20230209.log
Modified/Added Sections : 11, 12, 13
1. Site Identification of the GNSS Monument
Site Name : Sofia / Bulgaria
Four Character ID : SOFI
Monument Inscription :
IERS DOMES Number : 11101M002
CDP Number : (A4)
Monument Description : CONCRETE PILLAR ON THE ROOF
Height of the Monument : 0.9 m
Monument Foundation : CONCRETE PILLAR ANCHORED ON THE ROOF
Foundation Depth : (m)
Marker Description : SURVEY MARKER BOLT
Date Installed : 1997-05-19T10:00Z
Geologic Characteristic : (BEDROCK/CLAY/CONGLOMERATE/GRAVEL/SAND/etc)
Bedrock Type : (IGNEOUS/METAMORPHIC/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 concrete GPS pillar is anchored on the roof
: on the building of the Military Geographic
: Service Observatory. The top of the pillar is
: 6.9 m above the ground.
: Non-consolidated continental sediments for the
: bedrock.
2. Site Location Information
City or Town : Sofia
State or Province : N/A
Country : Bulgaria
Tectonic Plate : EURASIAN
Approximate Position (ITRF)
X coordinate (m) : 4319372.390
Y coordinate (m) : 1868687.570
Z coordinate (m) : 4292063.800
Latitude (N is +) : +423321.93
Longitude (E is +) : +0232341.02
Elevation (m,ellips.) : 1119.6
Additional Information : (multiple lines)
3. GNSS Receiver Information
3.1 Receiver Type : ROGUE SNR-8000
Satellite System : GPS
Serial Number : T344
Firmware Version : 3.2.32.4
Elevation Cutoff Setting : 0 deg
Date Installed : 1997-05-19T10:00Z
Date Removed : 1999-07-11T11:00Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : (multiple lines)
3.2 Receiver Type : ROGUE SNR-8000
Satellite System : GPS
Serial Number : T344
Firmware Version : 3.2.32.9
Elevation Cutoff Setting : 0 deg
Date Installed : 1999-07-11T11:00Z
Date Removed : 2000-11-25T23:59Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : (multiple lines)
3.3 Receiver Type : AOA SNR-8000 ACT
Satellite System : GPS
Serial Number : T-344U
Firmware Version : 3.3.32.2
Elevation Cutoff Setting : 0 deg
Date Installed : 2001-03-09T10:00Z
Date Removed : 2005-06-06T12:00Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : (multiple lines)
3.4 Receiver Type : TPS E_GGD
Satellite System : GPS+GLO
Serial Number : AFUY1RUPO1S
Firmware Version : 2.3 Apr,28,2004 p4
Elevation Cutoff Setting : 0 deg
Date Installed : 2005-06-06T12:00Z
Date Removed : 2005-07-20T11:00Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : Additional number LE 2130
: on the type level.
3.5 Receiver Type : TPS E_GGD
Satellite System : GPS+GLO
Serial Number : AFUY1RUPO1S
Firmware Version : 2.3 APR,28,2004 P4
Elevation Cutoff Setting : 0 deg
Date Installed : 2005-07-20T11:00Z
Date Removed : 2007-11-09T08:00Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : Additional number LE 2130
: on the Type level.
: No actual change took
: place.
: /par/lock/notvis switched
: to 'on' for 'all in view'.
3.6 Receiver Type : TPS E_GGD
Satellite System : GPS+GLO
Serial Number : AFLQXTM48W0
Firmware Version : 2.6.0 APR,18,2007
Elevation Cutoff Setting : 0 deg
Date Installed : 2007-11-09T08:40Z
Date Removed : 2008-01-17T16:14Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : Additional number LE4567
: on the Type level.
: /par/lock/notvis switched
: to 'on' for 'all in view'.
3.7 Receiver Type : TPS E_GGD
Satellite System : GPS+GLO
Serial Number : AFLQXTM48W0
Firmware Version : 2.6.1 JAN,10,2008
Elevation Cutoff Setting : 0 deg
Date Installed : 2008-01-17T16:15Z
Date Removed : 2010-03-26T09:39Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : Additional number LE4567
: /par/lock/notvis switched
: to 'on' for 'all in view'.
: on the Type level.
3.8 Receiver Type : TPS E_GGD
Satellite System : GPS+GLO
Serial Number : AFLQXTM48W0
Firmware Version : 3.4 DEC,12,2009 P2
Elevation Cutoff Setting : 0 deg
Date Installed : 2010-03-26T09:40Z
Date Removed : 2010-03-30T14:29Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : Additional number LE4567
: /par/lock/notvis switched
: to 'on' for 'all in view'.
: on the Type level.
3.9 Receiver Type : TPS E_GGD
Satellite System : GPS+GLO
Serial Number : AFLQXTM48W0
Firmware Version : 2.6.1 JAN,10,2008
Elevation Cutoff Setting : 0 deg
Date Installed : 2010-03-30T14:30Z
Date Removed : 2010-04-29T12:59Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : Additional number LE4567
: /par/lock/notvis switched
: to 'on' for 'all in view'.
: on the Type level.
3.10 Receiver Type : LEICA GRX1200GGPRO
Satellite System : GPS+GLO
Serial Number : 356544
Firmware Version : 7.80/3.018
Elevation Cutoff Setting : 0 deg
Date Installed : 2010-04-29T13:00Z
Date Removed : 2010-05-02T15:59Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : (multiple lines)
3.11 Receiver Type : LEICA GRX1200GGPRO
Satellite System : GPS+GLO
Serial Number : 356544
Firmware Version : 7.80/3.019
Elevation Cutoff Setting : 0 deg
Date Installed : 2010-05-02T16:00Z
Date Removed : 2014-06-12T13:29Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : (multiple lines)
3.12 Receiver Type : LEICA GRX1200GGPRO
Satellite System : GPS+GLO
Serial Number : 356544
Firmware Version : 7.80/3.054
Elevation Cutoff Setting : 0 deg
Date Installed : 2014-06-12T13:30Z
Date Removed : 2014-06-17T12:34Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : (multiple lines)
3.13 Receiver Type : LEICA GRX1200GGPRO
Satellite System : GPS+GLO
Serial Number : 356544
Firmware Version : 8.71/3.822
Elevation Cutoff Setting : 0 deg
Date Installed : 2014-06-17T12:35Z
Date Removed : 2014-07-21T13:54Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : (multiple lines)
3.14 Receiver Type : LEICA GRX1200GGPRO
Satellite System : GPS+GLO
Serial Number : 356544
Firmware Version : 8.71/3.823
Elevation Cutoff Setting : 0 deg
Date Installed : 2014-07-21T13:55Z
Date Removed : 2021-02-08T12:00Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : (multiple lines)
3.15 Receiver Type : LEICA GR50
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 1831025
Firmware Version : 4.31/7.403
Elevation Cutoff Setting : 0 deg
Date Installed : 2021-02-10T09:00Z
Date Removed : 2021-05-26T09:00Z
Temperature Stabiliz. : none
Additional Information : (multiple lines)
3.16 Receiver Type : LEICA GR50
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 1831025
Firmware Version : 4.50/7.710
Elevation Cutoff Setting : 0 deg
Date Installed : 2021-05-26T09:25Z
Date Removed : CCYY-MM-DDThh:mmZ
Temperature Stabiliz. : none
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 : AOAD/M_T NONE
Serial Number : 287
Antenna Reference Point : BPA
Marker->ARP Up Ecc. (m) : 0.2200
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 : RG 214
Antenna Cable Length : 30 m
Date Installed : 1997-05-19T10:00Z
Date Removed : 2000-10-13T00:00Z
Additional Information : (multiple lines)
4.2 Antenna Type : AOAD/M_T NONE
Serial Number : 287
Antenna Reference Point : BPA
Marker->ARP Up Ecc. (m) : 0.2203
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 : RG 214
Antenna Cable Length : 30 m
Date Installed : 2000-10-13T00:00Z
Date Removed : 2001-03-10T00:00Z
Additional Information : (multiple lines)
4.3 Antenna Type : AOAD/M_T NONE
Serial Number : 287
Antenna Reference Point : BPA
Marker->ARP Up Ecc. (m) : 0.2200
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 : RG 214
Antenna Cable Length : 30 m
Date Installed : 2001-03-10T00:00Z
Date Removed : 2010-04-29T12:59Z
Additional Information : (multiple lines)
4.4 Antenna Type : LEIAR25.R3 LEIT
Serial Number : 09160008
Antenna Reference Point : BPA
Marker->ARP Up Ecc. (m) : 0.2200
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 :
Antenna Cable Type : RG 214
Antenna Cable Length : 30 m
Date Installed : 2010-04-29T13:00Z
Date Removed : CCYY-MM-DDThh:mmZ
Additional Information : Antenna calibrated absolute
: by Geo++ Garbsen, 2010-04-01.
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 : SLR
Tied Marker Usage : SLR
Tied Marker CDP Number : 7505
Tied Marker DOMES Number : 11101M001
Differential Components from GNSS Marker to the tied monument (ITRS)
dx (m) : 25.284 m
dy (m) : 10.325 m
dz (m) : -39.033 m
Accuracy (mm) : 1 mm
Survey method : TRIANGULATION
Date Measured : 1995-09-21
Additional Information : MTLRS-1
5.2 Tied Marker Name : Pillar 0556A
Tied Marker Usage : GPS
Tied Marker CDP Number : (A4)
Tied Marker DOMES Number : (A9)
Differential Components from GNSS Marker to the tied monument (ITRS)
dx (m) : 8.279 m
dy (m) : -42.383 m
dz (m) : 9.307 m
Accuracy (mm) : 1 mm
Survey method : TRIANGULATION
Date Measured : 1995-09-21
Additional Information : EUREF-BG-1992
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 : 1997-05-19/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
7.1 Instrumentation Type : GPS EUREF-BG-1992
Status : MOBILE
Effective Dates : 1992-10-04/1992-10-08
Notes : Pillar 0556A.
: TEMPORARY.
7.2 Instrumentation Type : SLR MTLRS-1
Status : MOBILE
Effective Dates : 1995-09-01/1995-10-01
Notes : (multiple lines)
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 : MP408A-T4-W4W
Manufacturer : ROTRONIC
Serial Number :
Data Sampling Interval : 900 sec
Accuracy (% rel h) : 1.5 % rel h
Aspiration : CAPACITANCE PROBE
Height Diff to Ant : 2 m
Calibration date : (CCYY-MM-DD)
Effective Dates : 1997-06-01/2005-06-06
Notes : Humidity Sensor is
: 2.0 m below the antenna
8.1.2 Humidity Sensor Model : HD 9008 TR
Manufacturer : Delta Ohm
Serial Number : 04017147
Data Sampling Interval : 900 sec
Accuracy (% rel h) : 1.5 % rel h
Aspiration : CAPACITANCE PROBE
Height Diff to Ant : 2 m
Calibration date : (CCYY-MM-DD)
Effective Dates : 2005-06-06/2021-02-08
Notes : Humidity Sensor is
: 2.0 m below the antenna
8.1.3 Humidity Sensor Model : Vaisala WXT520
Manufacturer : Vaisala
Serial Number : L4310382
Data Sampling Interval : 900 sec
Accuracy (% rel h) : (% rel h)
Aspiration : (UNASPIRATED/NATURAL/FAN/etc)
Height Diff to Ant : 0 m
Calibration date : (CCYY-MM-DD)
Effective Dates : 2021-02-10/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 : APS
Manufacturer : L-TEC LEIBENGUTH
Serial Number :
Data Sampling Interval : 900 sec
Accuracy : 1 hPa
Height Diff to Ant : 2 m
Calibration date : (CCYY-MM-DD)
Effective Dates : 1997-06-01/1999-10-26
Notes : Pressure Sensor is
: 2.0 m below the antenna
8.2.2 Pressure Sensor Model : APS
Manufacturer : L-TEC LEIBENGUTH
Serial Number : 4895A136
Data Sampling Interval : 900 sec
Accuracy : 1 hPa
Height Diff to Ant : 2 m
Calibration date : (CCYY-MM-DD)
Effective Dates : 1999-10-26/2000-02-01
Notes : Pressure Sensor is
: 2.0 m below the antenna
8.2.3 Pressure Sensor Model : APS
Manufacturer : L-TEC LEIBENGUTH
Serial Number : 4895A143
Data Sampling Interval : 900 sec
Accuracy : 1 hPa
Height Diff to Ant : 2 m
Calibration date : (CCYY-MM-DD)
Effective Dates : 2000-02-01/2005-06-06
Notes : Pressure Sensor is
: 2.0 m below the antenna
8.2.4 Pressure Sensor Model : APS
Manufacturer : Roesler + Cie
Serial Number : 11 5A011 95
Data Sampling Interval : 900 sec
Accuracy : 1 hPa
Height Diff to Ant : 2 m
Calibration date : (CCYY-MM-DD)
Effective Dates : 2005-06-06/2021-02-08
Notes : Pressure Sensor is
: 2.0 m below the antenna
8.2.5 Pressure Sensor Model : Vaisala WXT520
Manufacturer : Vaisala
Serial Number : L4310382
Data Sampling Interval : 900 sec
Accuracy : (hPa)
Height Diff to Ant : 0 m
Calibration date : (CCYY-MM-DD)
Effective Dates : 2021-02-10/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 : MP408A
Manufacturer : ROTRONIC
Serial Number :
Data Sampling Interval : 900 sec
Accuracy : 0.3 deg C
Aspiration : PLATINUM PROBE
Height Diff to Ant : 2 m
Calibration date : (CCYY-MM-DD)
Effective Dates : 1997-06-01/2005-06-06
Notes : Temperature Sensor is
: 2.0 m below the antenna
8.3.2 Temp. Sensor Model : HD 9008 TR
Manufacturer : Delta Ohm
Serial Number : 04017147
Data Sampling Interval : 900 sec
Accuracy : 0.3 deg C
Aspiration : PLATINUM PROBE
Height Diff to Ant : 2 m
Calibration date : (CCYY-MM-DD)
Effective Dates : 2005-06-06/2021-02-08
Notes : Temperature Sensor is
: 2.0 m below the antenna
8.3.3 Temp. Sensor Model : Vaisala WXT520
Manufacturer : Vaisala
Serial Number : L4310382
Data Sampling Interval : 900 sec
Accuracy : (deg C)
Aspiration : (UNASPIRATED/NATURAL/FAN/etc)
Height Diff to Ant : 0 m
Calibration date : (CCYY-MM-DD)
Effective Dates : 2021-02-10/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 : Bundesamt fuer Kartographie und Geodaesie
: Department of Geodaesie
Preferred Abbreviation : BKG
Mailing Address : Richard-Strauss-Allee 11
: D-60598 Frankfurt a.M.
: Germany
Primary Contact
Contact Name : GOW Operator
Telephone (primary) : +49 9941 6030
Telephone (secondary) : +49 9941 603122
Fax : +49 9941 603222
E-mail : gnss_wtz@bkg.bund.de
Secondary Contact
Contact Name : BKG GNSS Data Center
Telephone (primary) : +49 69 6333274
Telephone (secondary) : +49 69 63331
Fax : +49 69 6333425
E-mail : bkg-gdc@bkg.bund.de
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 : BKG
Secondary Data Center : BEV
URL for More Information : https://www.bkg.bund.de
Hardcopy on File
Site Map : (Y or URL)
Site Diagram : (Y or URL)
Horizon Mask : (Y or URL)
Monument Description : Y
Site Pictures : Y
Additional Information : (multiple lines)
Antenna Graphics with Dimensions
AOAD/M_T
from 1997-05-19
until 2010-04-29
-----
/ + \ <-- 0.128 L2
| + | <-- 0.110 L1
+--------------------------------------------------+ <-- 0.102 TCR
| |
| |
| |
| |
+-+--------------------------------------------------+-+ <-- 0.038
+-------------------+-------------+--------------------+ <-- 0.035 BCR
| |
=| |
+------x------+ <-- 0.0 BPA=ARP
<-- 0.381 -->
LEIAR25.R3
from 2010-04-29
+-------+ <-- 0.1995
/ \
+---+-------------+---+ <-- 0.1606 TCR
| |
|---------------------------|
|---------------------------------|
|---------------------------------------|
+---------------------------------------------+
| |
| |
+-+---------------------------------------------+-+
+-----------------+-------------+-----------------+ <-- 0.0320 BCR
| |
| |
+------x------+ <-- 0.0000 BPA=ARP
<-- 0.3802 -->
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
