GOP600CZE 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) : GOP operation center (gop_oc@pecny.cz)
Date Prepared : 2023-09-25
Report Type : UPDATE
If Update:
Previous Site Log : gop600cze_20210901.log
Modified/Added Sections : 3.10, 3.11, 7.1, 7.2, 7.3, 8.5.4, 8.5.1, 8.5.2,
: 11, 13
1. Site Identification of the GNSS Monument
Site Name : Pecny, Ondrejov / CZ
Four Character ID : GOP6
Monument Inscription :
IERS DOMES Number : 11502M006
CDP Number : (A4)
Monument Description : CONCRETE PILLAR ON THE ROOF
Height of the Monument : 11.6 m
Monument Foundation : ROOF OF BUILDING
Foundation Depth : 3.6 m
Marker Description : CENTER OF HOLE OF STEEL FORCED CENTERING
Date Installed : 2006-07-04
Geologic Characteristic : BEDROCK
Bedrock Type : METAMORPHIC
Bedrock Condition : WEATHERED
Fracture Spacing : 51-200 cm
Fault zones nearby : NO
Distance/activity : (multiple lines)
Additional Information : Height of pillar above roof is 4.4
: Height of point above groud is 11.6
2. Site Location Information
City or Town : Ondrejov
State or Province : Bohemia
Country : Czechia
Tectonic Plate : EURASIAN
Approximate Position (ITRF)
X coordinate (m) : 3979319.620
Y coordinate (m) : 1050311.940
Z coordinate (m) : 4857064.380
Latitude (N is +) : +495449.20
Longitude (E is +) : +0144708.17
Elevation (m,ellips.) : 592.6
Additional Information : ETRF89
3. GNSS Receiver Information
3.1 Receiver Type : LEICA GRX1200+GNSS
Satellite System : GPS+GLO+GAL+SBAS
Serial Number : 496604
Firmware Version : 8.50/6.110
Elevation Cutoff Setting : 0 deg
Date Installed : 2011-12-21
Date Removed : 2012-02-27T21:30Z
Temperature Stabiliz. : 21.0 +/- 1.0
Additional Information : air conditioning
3.2 Receiver Type : LEICA GRX1200+GNSS
Satellite System : GPS+GLO+GAL+SBAS
Serial Number : 496604
Firmware Version : 8.51/6.110
Elevation Cutoff Setting : 0 deg
Date Installed : 2012-02-27T22:17Z
Date Removed : 2012-08-07T11:51Z
Temperature Stabiliz. : 21.0 +/- 1.0
Additional Information : air conditioning
3.3 Receiver Type : LEICA GRX1200+GNSS
Satellite System : GPS+GLO+GAL+SBAS
Serial Number : 496604
Firmware Version : 8.51/6.111
Elevation Cutoff Setting : 0 deg
Date Installed : 2012-08-07T11:55Z
Date Removed : 2013-06-24T20:40Z
Temperature Stabiliz. : 21.0 +/- 1.0
Additional Information : air conditioning
3.4 Receiver Type : LEICA GRX1200+GNSS
Satellite System : GPS+GLO+GAL+SBAS
Serial Number : 496604
Firmware Version : 8.71/6.112
Elevation Cutoff Setting : 0 deg
Date Installed : 2013-06-24T21:00Z
Date Removed : 2015-07-28T22:27Z
Temperature Stabiliz. : 21.0 +/- 1.0
Additional Information : air conditioning
3.5 Receiver Type : LEICA GRX1200+GNSS
Satellite System : GPS+GLO+GAL+SBAS
Serial Number : 496604
Firmware Version : 9.20/6.404
Elevation Cutoff Setting : 0 deg
Date Installed : 2015-07-28T23:02Z
Date Removed : 2017-01-02T23:59Z
Temperature Stabiliz. : 21.0 +/- 1.0
Additional Information : air conditioning
3.6 Receiver Type : LEICA GRX1200+GNSS
Satellite System : GPS+GLO+GAL
Serial Number : 496604
Firmware Version : 9.20/6.405
Elevation Cutoff Setting : 0 deg
Date Installed : 2017-01-03T00:00Z
Date Removed : 2018-07-30T20:25Z
Temperature Stabiliz. : 21.0 +/- 1.0
Additional Information : air conditioning
3.7 Receiver Type : SEPT POLARX5
Satellite System : GPS+GLO+GAL+BDS+QZSS+IRNSS+SBAS
Serial Number : 3023088
Firmware Version : 5.2.0
Elevation Cutoff Setting : 0 deg
Date Installed : 2018-07-30T20:40Z
Date Removed : 2019-10-02T15:24Z
Temperature Stabiliz. : 21.0 +/- 1.0
Additional Information : air conditioning
3.8 Receiver Type : SEPT POLARX5
Satellite System : GPS+GLO+GAL+BDS+QZSS+IRNSS+SBAS
Serial Number : 3023088
Firmware Version : 5.3.0
Elevation Cutoff Setting : 0 deg
Date Installed : 2019-10-02T15:27Z
Date Removed : 2020-02-19T13:28Z
Temperature Stabiliz. : 21.0 +/- 1.0
Additional Information : air conditioning
3.9 Receiver Type : SEPT POLARX5
Satellite System : GPS+GLO+GAL+BDS+QZSS+IRNSS+SBAS
Serial Number : 3023088
Firmware Version : 5.3.2
Elevation Cutoff Setting : 0 deg
Date Installed : 2020-02-19T13:31Z
Date Removed : 2021-02-08T13:39Z
Temperature Stabiliz. : 21.0 +/- 1.0
Additional Information : air conditioning
3.10 Receiver Type : SEPT POLARX5
Satellite System : GPS+GLO+GAL+BDS+QZSS+IRNSS+SBAS
Serial Number : 3023088
Firmware Version : 5.4.0
Elevation Cutoff Setting : 0 deg
Date Installed : 2021-02-08T13:42Z
Date Removed : 2023-09-25T19:50Z
Temperature Stabiliz. : 21.0 +/- 1.0
Additional Information : air conditioning
3.11 Receiver Type : SEPT POLARX5
Satellite System : GPS+GLO+GAL+BDS+QZSS+IRNSS+SBAS
Serial Number : 3023088
Firmware Version : 5.5.0
Elevation Cutoff Setting : 0 deg
Date Installed : 2023-09-25T19:54Z
Date Removed : CCYY-MM-DDThh:mmZ
Temperature Stabiliz. : 21.0 +/- 1.0
Additional Information : air conditioning
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 : LEIAR25.R4 LEIT
Serial Number : 725071
Antenna Reference Point : BPA
Marker->ARP Up Ecc. (m) : 0.0653
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 : 725071
Antenna Cable Type : SEMIRIGID RG218
Antenna Cable Length : 30 m
Date Installed : 2011-12-21
Date Removed : 2012-04-10T14:30Z
Additional Information : antenna is absolute calibrated by Geo++ GmbH
: on June,06 2011
4.2 Antenna Type : LEIAR25.R4 LEIT
Serial Number : 725071
Antenna Reference Point : BPA
Marker->ARP Up Ecc. (m) : 0.0653
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 : 725071
Antenna Cable Type : SEMIRIGID RG218 + ARRESTOR + SPLITTER + RG58
Antenna Cable Length : 31.5 m
Date Installed : 2012-04-10T14:30Z
Date Removed : 2019-04-09T07:00Z
Additional Information : between the antenna and the receiver
: installed:
: -the surge arrestor Brok PN:
: USPKO-N-50-3,2G-B/F-M
: -the active antenna signal splitter
: GPS NETWORKING PN: NALDCBS1X4-N/7.5/220
: it powers the antenna pre-amplifier
4.3 Antenna Type : SEPCHOKE_B3E6 SPKE
Serial Number : 5287
Antenna Reference Point : BPA
Marker->ARP Up Ecc. (m) : 0.0653
Marker->ARP North Ecc(m) : 0.0000
Marker->ARP East Ecc(m) : 0.0000
Alignment from True N : 0 deg
Antenna Radome Type : SPKE
Radome Serial Number : 5287
Antenna Cable Type : SEMIRIGID RG218 + ARRESTOR + SPLITTER + RG58
Antenna Cable Length : 31.5 m
Date Installed : 2019-04-09T07:10Z
Date Removed : CCYY-MM-DDThh:mmZ
Additional Information : between the antenna and the receiver
: installed:
: -the surge arrestor Brok PN:
: USPKO-N-50-3,2G-B/F-M
: -the active antenna signal splitter
: GPS NETWORKING PN: NALDCBS1X4-N/7.5/220
: it powers the antenna pre-amplifier
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 : EUREF 0209
Tied Marker Usage : TRIANGULATION STATION
Tied Marker CDP Number : (A4)
Tied Marker DOMES Number : 11502M001
Differential Components from GNSS Marker to the tied monument (ITRS)
dx (m) : -69.182 m
dy (m) : 84.992 m
dz (m) : 35.713 m
Accuracy (mm) : 1 mm
Survey method : GPS CAMPAIGN
Date Measured : 1994-04-01T00:00Z
Additional Information : The vector is referred to the reference point
: of GOP6 (mark on the top of the concrete
: pillar) i.e. dx = x (0209) - x (GOP6).
5.2 Tied Marker Name : GOPE
Tied Marker Usage : MAIN PILLAR
Tied Marker CDP Number : (A4)
Tied Marker DOMES Number : 11502M002
Differential Components from GNSS Marker to the tied monument (ITRS)
dx (m) : -3.200 m
dy (m) : 0.334 m
dz (m) : 2.532 m
Accuracy (mm) : 1 mm
Survey method : GPS CAMPAIGN
Date Measured : 2008-02-24T00:00Z
Additional Information : The vector is referred to the reference point
: of GOP6 (mark on the top of the concrete
: pillar) i.e. dx = x (GOPE) - x (GOP6).
: Date measured is mean epoch - results are
: average form 36 days of measurement.
5.3 Tied Marker Name : GOP3
Tied Marker Usage : EXCENTRIC PILLAR
Tied Marker CDP Number : (A4)
Tied Marker DOMES Number : 11502M003
Differential Components from GNSS Marker to the tied monument (ITRS)
dx (m) : -1.154 m
dy (m) : 2.919 m
dz (m) : 0.332 m
Accuracy (mm) : 1 mm
Survey method : GPS CAMPAIGN
Date Measured : 2008-03-01T00:00Z
Additional Information : The vector is referred to the reference point
: of GOP6 (mark on the top of the concrete
: pillar) i.e. dx = x (GOP3) - x (GOP6).
: Date measured is mean epoch - results are
: average form 24 days of measurement.
5.4 Tied Marker Name : GOP5
Tied Marker Usage : EXCENTRIC PILLAR
Tied Marker CDP Number : (A4)
Tied Marker DOMES Number : 11502M005
Differential Components from GNSS Marker to the tied monument (ITRS)
dx (m) : -0.381 m
dy (m) : 0.958 m
dz (m) : 0.115 m
Accuracy (mm) : 1 mm
Survey method : GPS CAMPAIGN
Date Measured : 2008-03-02T00:00Z
Additional Information : The vector is referred to the reference point
: of GOP6 (mark on the top of the concrete
: pillar) i.e. dx = x (GOP5) - x (GOP6).
: Date measured is mean epoch - results are
: average form 26 days of measurement.
5.5 Tied Marker Name : GOP4
Tied Marker Usage : EXCENTRIC PILLAR for GNSS TIME receiver
Tied Marker CDP Number : (A4)
Tied Marker DOMES Number : 11502M004
Differential Components from GNSS Marker to the tied monument (ITRS)
dx (m) : -0.769 m
dy (m) : 1.951 m
dz (m) : 0.225 m
Accuracy (mm) : 1 mm
Survey method : GPS CAMPAIGN
Date Measured : 2008-03-03T00:00Z
Additional Information : The vector is referred to the reference point
: of GOP6 (mark on the top of the concrete
: pillar) i.e. dx = x (GOP4) - x (GOP6).
: Date measured is mean epoch - results are
: average form 44 days of measurement.
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 CESIUM
Input Frequency : 10 MHz
Effective Dates : 2011-12-27/2019-05-07
Notes : Symmetricom 5071A cesium atomic clock
: Frequency steered to national standard
: TP (Tempus Pragensis) using optical link
: time transfer.
6.2 Standard Type : INTERNAL
Input Frequency : (if external)
Effective Dates : 2019-05-07/2019-05-09
Notes : (multiple lines)
6.3 Standard Type : EXTERNAL PASSIVE HYDROGEN MASER
Input Frequency : 10 MHz
Effective Dates : 2019-05-09/2021-09-01
Notes : OSA 3700
6.4 Standard Type : EXTERNAL CESIUM
Input Frequency : 10 MHz
Effective Dates : 2021-09-01/CCYY-MM-DD
Notes : Symmetricom 5071A cesium atomic clock
: Frequency steered to national standard
: TP (Tempus Pragensis) using optical link
: time transfer.
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
Status : PERMANENT
Effective Dates : 1995-05-13/CCYY-MM-DD
Notes : IGS station GOPE
7.2 Instrumentation Type : CRYOGENIC GRAVIMETER
Status : PERMANENT
Effective Dates : 2007-02-14/CCYY-MM-DD
Notes : GWR OSG-050
: GGP station PE
: 2017: moved to new lab
7.3 Instrumentation Type : SEISMOMETER
Status : PERMANENT
Effective Dates : 2009-05-14/CCYY-MM-DD
Notes : Very-broad-band seismometer Guralp CMG-3TD
: instaled in 60 m depth borehole
: Seismic station GOPC
: now broken and removed from borehole
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 : HG421.65
Manufacturer : COMET SYSTEM, Czech Republic
Serial Number : 02430108
Data Sampling Interval : 60 sec
Accuracy (% rel h) : 3 % rel h
Aspiration : NATURAL
Height Diff to Ant : -0.55 m
Calibration date : 2009-04-17
Effective Dates : 2009-04-15/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 : T7410
Manufacturer : COMET SYSTEM, Czech Republic
Serial Number : 08960984
Data Sampling Interval : 60 sec
Accuracy : 0.4 hPa
Height Diff to Ant : -0.43 m
Calibration date : 2009-04-17
Effective Dates : 2009-12-14/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 : NS520.65-120
Manufacturer : COMET, Czech Republic
Serial Number : 9838033
Data Sampling Interval : 60 sec
Accuracy : 0.4 deg C
Aspiration : UNASPIRATED
Height Diff to Ant : -0.5 m
Calibration date : 2009-04-17
Effective Dates : 2009-04-15/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)
8.4.1 Water Vapor Radiometer : TP/WVP-3000
Manufacturer : RADIOMETRICS, USA
Serial Number : 3025
Distance to Antenna : 5.08 m
Height Diff to Ant : 0.1 m
Calibration date : 2006-09-14
Effective Dates : 2006-09-11/2017-03-15
Notes : Unrepairable. Last measurement on 2016-02-18.
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 direction
: Vaisala, FI
: model WAV151
: last data from 2015-05-04
8.5.2 Other Instrumentation : wind speed
: Vaisala, FI
: model WAA151
: last data from 2015-05-04
8.5.3 Other Instrumentation : precipitation gauge
: Meteoservis, CZ
: model MR3H (heated)
8.5.4 Other Instrumentation : wind speed and direction
: Baghirra, CZ
: model TM WSD
: first data from 2020-02-19
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)
9.3.1 Signal Obstructions : TREES
Effective Dates : 2011-12-21/2019-03-29
Additional Information : 2019-02-06/2019-03-29 reduction obstructions
: in elevation angles between 5 and 15 degrees
:
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 : Geodetic Observatory Pecny, RIGTC
Preferred Abbreviation : GOP
Mailing Address : Pecny 244
: CZ-25165 Ondrejov
: Czechia
Primary Contact
Contact Name : GOP operation center
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail : gop_oc@pecny.cz
Secondary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
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 :
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
LEIAR25.R4 LEIT
Dorne Margolin with 3D choke ring (Revision 4) GPS: L1,L2,L5 GLONASS: L1,L2,L3
Galileo: E2-L1-E1,E5a,E5b,E6,AltBOC Compass: B1,B2,B3 L-BAND
Includes insert for enhanced L5 performance.
___---___
__--- ---__
__/ \__
_/ \_
_/ \_
/ +-------+ \ <-- 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 BPA: Bottom of Preamplifier
TCR: Top of Chokering BCR: Bottom of Chokering
SEPCHOKE_B3E6 SPKE
| <-- 0.3977
|
|
| |
| |
| |
| |
| |
--------- <-- 0.2847
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ --------------- \ <-- 0.1550
/ / \ \ <-- 0.128
| | | |
|+-----------------------------------------------------+| <-- 0.1080 TCR
|| ||
|| ||
|| ||
|| ||
++-----------------+-----------------+-----------------++ <-- 0.0480 BCR
| |
| |
| |
+--------x--------+ <-- 0.0000 BPA=ARP
<-- 0.1210 -->
<-- 0.3630 -->
<--- 0.3734 --->
Antenna heights:
| <-- 0.4630
|
|
| |
| |
| |
| |
| |
--------- <-- 0.3500
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ \
/ --------------- \ <-- 0.2203
/ / \ \ <-- 0.1933
| | | |
|+-----------------------------------------------------+| <-- 0.1733 TCR
|| ||
|| ||
|| ||
|| ||
++-----------------+-----------------+-----------------++ <-- 0.1133 BCR
| |
| |
| |
+--------x--------+ <-- 0.0653 BPA=ARP
| |
| |
| |
+++-----+----x----+-----+++ <-- 0.0 reference
+++---------------------+++ point GOP6/GOP7
|| ||
|| ||
|| ||
|| ||
|| ||
+---++---------------------++---+
| |
| pillar |
| |
| |
------------+-------------------------------+------------
roof
