DIEP00DEU Site Information Form (site log v2.0)
International GNSS Service
See Instructions at:
https://files.igs.org/pub/station/general/sitelog_instr_v2.0.txt
0. Form
Prepared by (full name) : GREF Operator ([email protected])
Date Prepared : 2023-04-19
Report Type : UPDATE
If Update:
Previous Site Log : diep00deu_20230208.log
Modified/Added Sections : 11
1. Site Identification of the GNSS Monument
Site Name : Diepholz
Nine Character ID : DIEP00DEU
Monument Inscription :
IERS DOMES Number : 14287M001
CDP Number : (A4)
Monument Description : Steelpipe with concrete
Height of the Monument : 1.3 m
Monument Foundation : 2004
Foundation Depth : 9 m
Marker Description : SURVEY MARKER BOLT ON THE PILLAR
Date Installed : 2004-12-15T10:00Z
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 : Survey Marker Bolt on a pillar.
: Antenna mounted with a special screw
: adapter on a rivet thread of a circular
: tube of steel filled with concrete,
: 10.5 m length,
: at the military airport of Diepholz.
2. Site Location Information
City or Town : Diepholz
State or Province : Niedersachsen
Country or Region : DEU
Tectonic Plate : EURASIAN
Approximate Position (ITRF)
X coordinate (m) : 3842152.800
Y coordinate (m) : 563402.100
Z coordinate (m) : 5042888.600
Latitude (N is +) : +523517.00
Longitude (E is +) : +0082032.04
Elevation (m,ellips.) : 81.7
Additional Information : (multiple lines)
3. GNSS Receiver Information
3.1 Receiver Type : JPS LEGACY
Satellite System : GPS+GLO
Serial Number : AF3ONH2BTHC
Firmware Version : E_GGD_2/2.3p4
Elevation Cutoff Setting : 5 deg
Date Installed : 2004-12-15T10:00Z
Date Removed : 2007-06-08T10:00Z
Temperature Stabiliz. : none
Additional Information : Additional Number
: LE5569 on the
: type level
3.2 Receiver Type : JPS LEGACY
Satellite System : GPS+GLO
Serial Number : AF3ONH2BTHC
Firmware Version : 2.6.0 APR,18,2007
Elevation Cutoff Setting : 0 deg
Date Installed : 2007-06-08T10:00Z
Date Removed : 2008-01-29T11:30Z
Temperature Stabiliz. : none
Additional Information : Additional Number
: LE5569 on the
: type level
3.3 Receiver Type : JPS LEGACY
Satellite System : GPS+GLO
Serial Number : AF3ONH2BTHC
Firmware Version : 2.6.1 JAN,10,2008
Elevation Cutoff Setting : 0 deg
Date Installed : 2008-01-29T11:30Z
Date Removed : 2014-09-24T10:15Z
Temperature Stabiliz. : none
Additional Information : Additional Number
: LE5569 on the
: type level
3.4 Receiver Type : LEICA GR25
Satellite System : GPS+GLO+GAL+SBAS
Serial Number : 1831037
Firmware Version : 3.03/6.214
Elevation Cutoff Setting : 0 deg
Date Installed : 2014-09-24T14:00Z
Date Removed : 2015-01-26T09:20Z
Temperature Stabiliz. : none
Additional Information : ME serial number BDU13430033
3.5 Receiver Type : LEICA GR25
Satellite System : GPS+GLO+GAL+SBAS
Serial Number : 1831037
Firmware Version : 3.11.1639
Elevation Cutoff Setting : 0 deg
Date Installed : 2015-01-26T09:40Z
Date Removed : 2016-05-04T14:30Z
Temperature Stabiliz. : none
Additional Information : ME serial number BDU13430033
3.6 Receiver Type : LEICA GR25
Satellite System : GPS+GLO+GAL+SBAS
Serial Number : 1831037
Firmware Version : 3.22.1818
Elevation Cutoff Setting : 0 deg
Date Installed : 2016-05-04T14:30Z
Date Removed : 2016-07-13T11:00Z
Temperature Stabiliz. : none
Additional Information : ME serial number BDU13430033
3.7 Receiver Type : LEICA GR25
Satellite System : GPS+GLO+GAL+SBAS
Serial Number : 1831037
Firmware Version : 4.00.335
Elevation Cutoff Setting : 0 deg
Date Installed : 2016-07-13T11:00Z
Date Removed : 2016-12-27T11:40Z
Temperature Stabiliz. : none
Additional Information : ME serial number BDU13430033
3.8 Receiver Type : LEICA GR25
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 1831037
Firmware Version : 4.02.386
Elevation Cutoff Setting : 0 deg
Date Installed : 2016-12-27T11:40Z
Date Removed : 2017-04-10T11:15Z
Temperature Stabiliz. : none
Additional Information : ME serial number BDU13430033
3.9 Receiver Type : LEICA GR25
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 1831037
Firmware Version : 4.11.606
Elevation Cutoff Setting : 0 deg
Date Installed : 2017-04-10T11:15Z
Date Removed : 2018-08-09T00:00Z
Temperature Stabiliz. : none
Additional Information : ME serial number BDU13430033
3.10 Receiver Type : LEICA GR25
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 1831037
Firmware Version : 4.11/6.523
Elevation Cutoff Setting : 0 deg
Date Installed : 2018-08-09T00:00Z
Date Removed : 2018-08-23T08:00Z
Temperature Stabiliz. : none
Additional Information : ME serial number BDU13430033
3.11 Receiver Type : LEICA GR25
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 1831037
Firmware Version : 4.30.063
Elevation Cutoff Setting : 0 deg
Date Installed : 2018-08-23T08:00Z
Date Removed : 2019-01-16T12:00Z
Temperature Stabiliz. : none
Additional Information : ME serial number BDU13430033
3.12 Receiver Type : JAVAD TRE_3 DELTA
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 02813
Firmware Version : 3.7.5 DEC,06,2018
Elevation Cutoff Setting : 0 deg
Date Installed : 2019-01-16T12:00Z
Date Removed : 2019-01-30T06:00Z
Temperature Stabiliz. : none
Additional Information : Board Id: 0S4DTIK6B2DYP0QDSPVJA2QGHS
:
3.13 Receiver Type : JAVAD TRE_3 DELTA
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 02813
Firmware Version : 3.7.5P1 JAN,23,2019
Elevation Cutoff Setting : 0 deg
Date Installed : 2019-01-30T06:00Z
Date Removed : 2019-05-17T09:25Z
Temperature Stabiliz. : none
Additional Information : Board Id: 0S4DTIK6B2DYP0QDSPVJA2QGHS
3.14 Receiver Type : JAVAD TRE_3 DELTA
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 02813
Firmware Version : 3.7.6 APR,08,2019
Elevation Cutoff Setting : 0 deg
Date Installed : 2019-05-17T09:30Z
Date Removed : 2020-03-12T10:20Z
Temperature Stabiliz. : none
Additional Information : Board Id: 0S4DTIK6B2DYP0QDSPVJA2QGHS
:
3.15 Receiver Type : JAVAD TRE_3 DELTA
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 02813
Firmware Version : 3.7.9 DEC,30,2019
Elevation Cutoff Setting : 0 deg
Date Installed : 2020-03-12T10:30Z
Date Removed : 2020-11-05T09:20Z
Temperature Stabiliz. : none
Additional Information : Board Id
: 0S4DTIK6B2DYP0QDSPVJA2QGHS
3.16 Receiver Type : JAVAD TRE_3 DELTA
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 02813
Firmware Version : 3.7.10 Oct,22,2020
Elevation Cutoff Setting : 0 deg
Date Installed : 2020-11-05T09:20Z
Date Removed : 2021-08-02T07:00Z
Temperature Stabiliz. : none
Additional Information : Board Id
: 0S4DTIK6B2DYP0QDSPVJA2QGHS
3.17 Receiver Type : JAVAD TRE_3L DELTA
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 04321
Firmware Version : 4.1.02-210628
Elevation Cutoff Setting : 0 deg
Date Installed : 2021-08-02T08:00Z
Date Removed : 2021-08-31T08:25Z
Temperature Stabiliz. : none
Additional Information : Board Id
: E3B331CBC695263E9CC46F13E5
3.18 Receiver Type : JAVAD TRE_3L DELTA
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 04321
Firmware Version : 4.1.03-210713
Elevation Cutoff Setting : 0 deg
Date Installed : 2021-08-31T08:25Z
Date Removed : 2022-03-03T06:03Z
Temperature Stabiliz. : none
Additional Information : Board Id
: E3B331CBC695263E9CC46F13E5
3.19 Receiver Type : JAVAD TRE_3L DELTA
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 04321
Firmware Version : 4.1.04-211206
Elevation Cutoff Setting : 0 deg
Date Installed : 2022-03-03T06:03Z
Date Removed : 2023-02-08T10:22Z
Temperature Stabiliz. : none
Additional Information : Board Id
: E3B331CBC695263E9CC46F13E5
3.20 Receiver Type : JAVAD TRE_3L DELTA
Satellite System : GPS+GLO+GAL+BDS+SBAS
Serial Number : 04321
Firmware Version : 4.1.06-221128
Elevation Cutoff Setting : 0 deg
Date Installed : 2023-02-08T10:22Z
Date Removed : CCYY-MM-DDThh:mmZ
Temperature Stabiliz. : none
Additional Information : Board Id
: E3B331CBC695263E9CC46F13E5
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 : TPSCR3_GGD CONE
Serial Number : 217-0247
Antenna Reference Point : BPA
Marker->ARP Up Ecc. (m) : 0.0450
Marker->ARP North Ecc(m) : 0.0000
Marker->ARP East Ecc(m) : 0.0000
Alignment from True N : 0 deg
Antenna Radome Type : CONE
Radome Serial Number :
Antenna Cable Type : Ecoflex15
Antenna Cable Length : 95 m
Date Installed : 2004-12-15T10:00Z
Date Removed : 2013-04-03T14:20Z
Additional Information : (multiple lines)
4.2 Antenna Type : LEIAR25.R4 LEIT
Serial Number : 725268
Antenna Reference Point : BPA
Marker->ARP Up Ecc. (m) : 0.0450
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 : Ecoflex 15
Antenna Cable Length : 95 m
Date Installed : 2013-04-03T15:00Z
Date Removed : 2019-01-16T12:00Z
Additional Information : Antenna individual calibrated
: absolute by GEO++
4.3 Antenna Type : LEIAR25.R4 LEIT
Serial Number : 725557
Antenna Reference Point : BPA
Marker->ARP Up Ecc. (m) : 0.0450
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 : Ecoflex 15
Antenna Cable Length : 95 m
Date Installed : 2019-01-16T12:00Z
Date Removed : 2021-07-28T06:30Z
Additional Information : Antenna individual calibrated absolutely by
: : GEO++ - ROBOT 2013-01-15
: : UNI BONN - CHAMBER 2013-03-12
: : UNI BONN - CHAMBER 2018-08-23
4.4 Antenna Type : LEIAR25.R4 LEIT
Serial Number : 725267
Antenna Reference Point : BPA
Marker->ARP Up Ecc. (m) : 0.0455
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 : Ecoflex 15
Antenna Cable Length : 95 m
Date Installed : 2021-07-28T07:30Z
Date Removed : CCYY-MM-DDThh:mmZ
Additional Information : Antenna individual calibrated absolutely by
: : GEO++ - ROBOT 2012-09-25
: : GEO++ - ROBOT 2021-04-10
: : UNI BONN - CHAMBER 2013-02-20
: : UNI BONN - CHAMBER 2018-04-25
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 : 2004-12-15/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 : GNSS DIEP01DEU
Status : PERMANENT
Effective Dates : 2021-08-02/CCYY-MM-DD
Notes : Secondary Receiver at the same antenna.
: More information and data available on
: request.
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 : WXTPTU
Manufacturer : Vaisala
Serial Number : J2420010
Data Sampling Interval : 10 sec
Accuracy (% rel h) : 3 % rel h
Aspiration : NATURAL
Height Diff to Ant : -0.5 m
Calibration date : 2013-06-14
Effective Dates : 2018-08-23/CCYY-MM-DD
Notes : Vaisala WXT520 SN: J2440011
: Humidity Sensor is 0.5 m under the antenna
: capacitive thin film polymer HUMICAP 180 sensor
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 : WXTPTU
Manufacturer : Vaisala
Serial Number : J2420010
Data Sampling Interval : 10 sec
Accuracy : 1 hPa
Height Diff to Ant : -0.5 m
Calibration date : 2013-06-14
Effective Dates : 2018-08-23/CCYY-MM-DD
Notes : Vaisala WXT520 SN: J2440011
: Pressure Sensor is 0.5 m under the antenna
: capacitive silicon BAROCAP sensor
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 : WXTPTU
Manufacturer : Vaisala
Serial Number : J2420010
Data Sampling Interval : 10 sec
Accuracy : 0.3 deg C
Aspiration : NATURAL
Height Diff to Ant : -0.5 m
Calibration date : 2013-06-14
Effective Dates : 2018-08-23/CCYY-MM-DD
Notes : Vaisala WXT520 SN: J2440011
: Temperature Sensor is 0.5 m under the antenna
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)
8.5.1 Other Instrumentation : Wind Azimut
: Wind Sensor Model WXT520 (heated)
: Manufacturer Vaisala
: Serial Number J2440011
: Data Sampling Interval 10 sec
: Accuracy 3 deg
: Height Diff to Ant -0.5 m
: Test date 2013-06-14
: Effective Dates 2018-08-23/CCYY-MM-DD
: Notes Wind Sensor is 0.5 m under the antenna
: Notes ultrasonic WINDCAP sensor
8.5.2 Other Instrumentation : Wind Speed
: Wind Sensor Model WXT520 (heated)
: Manufacturer Vaisala
: Serial Number J2440011
: Data Sampling Interval 10 sec
: Accuracy
: measurement values 0..35 m/s 0.3 m/s or 3%
: measurement values 36..60 m/s 5%
: Height Diff to Ant -0.5 m
: Test date 2013-06-14
: Effective Dates 2018-08-23/CCYY-MM-DD
: Notes Wind Sensor is 0.5 m under the antenna
: Notes ultrasonic WINDCAP sensor
8.5.3 Other Instrumentation : Rain Increment
: Rain Sensor Model WXT520 (heated)
: Manufacturer Vaisala
: Serial Number J2440011
: Data Sampling Interval 10 sec
: Accuracy 5 %
: Height Diff to Ant -0.5 m
: Test date 2013-06-14
: Effective Dates 2018-08-23/CCYY-MM-DD
: Notes Rain Sensor is 0.5 m under the antenna
: Notes piezoelectrical RAINCAP sensor
8.5.4 Other Instrumentation : Hail Indicator
: Hail Sensor Model WXT520 (heated)
: Manufacturer Vaisala
: Serial Number J2440011
: Data Sampling Interval 10 sec
: Accuracy 5 %
: Height Diff to Ant -0.5 m
: Test date 2013-06-14
: Effective Dates 2018-08-23/CCYY-MM-DD
: Notes Hail Sensor is 0.5 m under the antenna
: Notes piezoelectrical RAINCAP sensor
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 : GREF Operator
Telephone (primary) : +49 341 5634410
Telephone (secondary) : +49 341 5634432
Fax : +49 341 5634415
E-mail : [email protected]
Secondary Contact
Contact Name : BKG GNSS Data Center
Telephone (primary) : +49 69 6333274
Telephone (secondary) : +49 69 63331
Fax : +49 69 6333425
E-mail : [email protected]
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 : gref.bkg.bund.de
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
Additional Information : (multiple lines)
Antenna Graphics with Dimensions
TPSCR3_GGD
---------
/ + \ <-- 0.104 = L2
| + | <-- 0.081 = L1
+--------------------------------------------------+ <-- 0.071 = TCR
| |
| |
| |
| |
+-----------------+-------------+------------------+ <-- 0.003 = BCR
+-----x-----+ <-- 0.000 BPA=ARP
<-- 0.326 -->
LEIAR25.R4
+-------+ <-- 0.1995
/ \
+---+-------------+---+ <-- 0.1606 TCR
| |
|---------------------------|
|---------------------------------|
|---------------------------------------|
+---------------------------------------------+
| |
| |
+-+---------------------------------------------+-+
+-----------------+-------------+-----------------+ <-- 0.0320 BCR
| |
| |
+------x------+ <-- 0.0000 BPA
BAM
<-- 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 BOP: Bottom of Pole
All dimensions are in meters.
