     RISA00SVK 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)  : SKPOS Department (skpos@skgeodesy.sk)
     Date Prepared            : 2026-01-23
     Report Type              : UPDATE
     If Update:
      Previous Site Log       : risa00svk_20251105.log
      Modified/Added Sections : 7.1


1.   Site Identification of the GNSS Monument

     Site Name                : RIMAVSKA SOBOTA 3733RS-90
     Nine Character ID        : RISA00SVK
     Monument Inscription     : 
     IERS DOMES Number        : 11541M002
     CDP Number               : (A4)
     Monument Description     : SHALLOW DRILLED BRACED
       Height of the Monument : 1.6 m
       Monument Foundation    : STEEL RODS
       Foundation Depth       : 5 m
     Marker Description       : SECO LEVELING MOUNT
     Date Installed           : 2013-10-23T00:00Z
     Geologic Characteristic  : SANDSTONE, CLAYSTONE
       Bedrock Type           : SEDIMENTARY
       Bedrock Condition      : WEATHERED
       Fracture Spacing       : (0 cm/1-10 cm/11-50 cm/51-200 cm/over 200 cm)
       Fault zones nearby     : (YES/NO/Name of the zone)
         Distance/activity    : (multiple lines)
     Additional Information   : (multiple lines)


2.   Site Location Information

     City or Town             : Rimavska Sobota
     State or Province        : Banska Bystrica province
     Country or Region        : SVK
     Tectonic Plate           : EURASIAN
     Approximate Position (ITRF)
       X coordinate (m)       : 3988762.700
       Y coordinate (m)       : 1452240.200
       Z coordinate (m)       : 4744788.100
       Latitude (N is +)      : +482225.95
       Longitude (E is +)     : +0200020.52
       Elevation (m,ellips.)  : 261.2
     Additional Information   : (multiple lines)


3.   GNSS Receiver Information

3.1  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+QZSS
     Serial Number            : 5235K52020
     Firmware Version         : Nav  4.81/4
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2013-11-15T00:00Z
     Date Removed             : 2013-12-16T12:00Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.2  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+QZSS
     Serial Number            : 5209K82805
     Firmware Version         : Nav  4.81/4
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2013-12-16T12:53Z
     Date Removed             : 2014-05-23T09:53Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.3  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+QZSS
     Serial Number            : 5209K82805
     Firmware Version         : Nav  4.85/4
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2014-05-23T12:53Z
     Date Removed             : 2015-02-03T10:01Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.4  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+QZSS
     Serial Number            : 5209K82805
     Firmware Version         : Nav  4.93/4
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2015-02-03T17:41Z
     Date Removed             : 2015-08-25T14:24Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.5  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+QZSS
     Serial Number            : 5209K82805
     Firmware Version         : Nav  5.03/5
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2015-08-25T14:29Z
     Date Removed             : 2015-11-19T06:50Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.6  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+QZSS
     Serial Number            : 5209K82805
     Firmware Version         : Nav  5.10/5
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2015-11-19T07:00Z
     Date Removed             : 2016-10-17T07:24Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.7  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+QZSS
     Serial Number            : 5209K82805
     Firmware Version         : 5.14/5.14
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2016-10-17T07:30Z
     Date Removed             : 2017-01-02T08:44Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.8  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+QZSS
     Serial Number            : 5209K82805
     Firmware Version         : 5.15/5.15
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2017-01-02T08:50Z
     Date Removed             : 2017-01-11T12:48Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.9  Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+QZSS
     Serial Number            : 5209K82805
     Firmware Version         : 5.20/5.20
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2017-01-11T12:53Z
     Date Removed             : 2017-04-18T12:38Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.10 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+QZSS
     Serial Number            : 5209K82805
     Firmware Version         : 5.22
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2017-04-18T12:43Z
     Date Removed             : 2017-09-04T09:59Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.11 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+QZSS
     Serial Number            : 5209K82805
     Firmware Version         : 5.30
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2017-09-04T10:10Z
     Date Removed             : 2018-06-19T06:09Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.12 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5209K82805
     Firmware Version         : 5.33
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2018-06-19T06:14Z
     Date Removed             : 2018-10-29T07:31Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.13 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5209K82805
     Firmware Version         : 5.37
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2018-10-29T07:36Z
     Date Removed             : 2019-09-06T04:52Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.14 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5209K82805
     Firmware Version         : 5.42
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2019-09-06T04:58Z
     Date Removed             : 2019-11-06T08:25Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.15 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5209K82805
     Firmware Version         : 5.43
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2019-11-06T08:31Z
     Date Removed             : 2020-01-17T08:28Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.16 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5209K82805
     Firmware Version         : 5.44
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2020-01-17T08:41Z
     Date Removed             : 2020-05-04T05:35Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.17 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5209K82805
     Firmware Version         : 5.45
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2020-05-04T05:41Z
     Date Removed             : 2020-09-24T07:12Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.18 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5209K82805
     Firmware Version         : 5.48
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2020-09-24T07:17Z
     Date Removed             : 2021-04-26T07:44Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.19 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5209K82805
     Firmware Version         : 5.50
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2021-04-26T07:50Z
     Date Removed             : 2021-11-03T08:48Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.20 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5209K82805
     Firmware Version         : 5.52
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2021-11-03T08:53Z
     Date Removed             : 2022-05-16T06:23Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : (multiple lines)

3.21 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5209K82805
     Firmware Version         : 5.54
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2022-05-16T06:28Z
     Date Removed             : 2022-09-22T08:11Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : firmware upgrade

3.22 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5209K82805
     Firmware Version         : 5.55
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2022-09-22T08:17Z
     Date Removed             : 2022-12-13T07:33Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : firmware upgrade

3.23 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5209K82805
     Firmware Version         : 5.56
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2022-12-13T07:38Z
     Date Removed             : 2023-05-09T06:25Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : firmware upgrade

3.24 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5209K82805
     Firmware Version         : 5.60
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2023-05-09T06:30Z
     Date Removed             : 2023-09-06T07:48Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : firmware upgrade

3.25 Receiver Type            : TRIMBLE NETR9
     Satellite System         : GPS+GLO+GAL+BDS+QZSS+SBAS
     Serial Number            : 5209K82805
     Firmware Version         : 5.61
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2023-09-06T07:54Z
     Date Removed             : 2024-04-18T06:35Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : firmware upgrade

3.26 Receiver Type            : TRIMBLE ALLOY
     Satellite System         : GPS+GLO+GAL+BDS+SBAS
     Serial Number            : 6249R40004
     Firmware Version         : 6.23
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2024-04-18T06:50Z
     Date Removed             : 2025-04-15T06:16Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : receiver change

3.27 Receiver Type            : TRIMBLE ALLOY
     Satellite System         : GPS+GLO+GAL+BDS+SBAS
     Serial Number            : 6249R40004
     Firmware Version         : 6.40
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2025-04-15T06:22Z
     Date Removed             : 2025-11-05T07:06Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : firmware upgrade

3.28 Receiver Type            : TRIMBLE ALLOY
     Satellite System         : GPS+GLO+GAL+BDS+SBAS
     Serial Number            : 6249R40004
     Firmware Version         : 6.43
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2025-11-05T07:12Z
     Date Removed             : CCYY-MM-DDThh:mmZ
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : firmware upgrade

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             : TRM57971.00     NONE
     Serial Number            : 5000117391
     Antenna Reference Point  : BAM
     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      : NONE
     Radome Serial Number     : 
     Antenna Cable Type       : (vendor & type number)
     Antenna Cable Length     : 30 m
     Date Installed           : 2013-11-15T00:00Z
     Date Removed             : 2025-09-23T09:30Z
     Additional Information   : Absolute antenna calibration by SenStadt Berlin
                              : Calibration date: 2013-10-28

4.2  Antenna Type             : TRM115000.00    NONE
     Serial Number            : 64453G0117
     Antenna Reference Point  : BAM
     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      : NONE
     Radome Serial Number     : 
     Antenna Cable Type       : Trimble
     Antenna Cable Length     : 30 m
     Date Installed           : 2025-09-23T10:05Z
     Date Removed             : CCYY-MM-DDThh:mmZ
     Additional Information   : antenna change

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        : 2012-10-23/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     : INSAR CR/I
       Status                 : PERMANENT
       Effective Dates        : 2024-05-16/CCYY-MM-DD
       Notes                  : Integrated Geodetic Reference Station (IGRS)
                              : with  mechanically coupled GNSS antenna, double
                              : backflip square trihedral corner reflectors for
                              : ascending and descending (In)SAR acquisitions.

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               : (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                   : Geodetic and Cartographic Institute Bratislava
                              : SKPOS Department
     Preferred Abbreviation   : GKU
     Mailing Address          : Chlumeckeho 4
                              : 827 45 Bratislava
                              : Slovakia
     Primary Contact
       Contact Name           : SKPOS Department
       Telephone (primary)    : 
       Telephone (secondary)  : 
       Fax                    : 
       E-mail                 : skpos@skgeodesy.sk
     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      : SUT - EPN LAC
     Secondary Data Center    : GKU - EPN OC
     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

TRM55971.00     NONE	(from 2013-11-15)

    / --------------------------------------------- \
   +                                                 +
    \ --------------------------------------------- /
                    \               /
                     \             /
                      \-----x-----/                        <--  0.0000  BAM=ARP

   <--                    0.3396                   -->

ARP: Antenna Reference Point	BAM: Bottom of antenna mount



Monument description:

    / ----------------------+--------------------- \
   +                        +                       +
    \ -------------------------------------------- /
                    \               /
                     \             /
reference point -->   \---+-x-+---/                    <--   0.0000  ARP=BAM
      	                  |   |
      	                  |   |
      	                  |   |
                       ___+___+___
                      / /  | |  \ \
                     / /   | |   \ \
                    / /    | |    \ \
                   / /     | |     \ \
                  / /      | |      \ \
                 / /       | |       \ \
                / /        | |        \ \
               / /         | |         \ \
              / /          | |          \ \  steel rods
             / /           | |           \ \
            / /            | |            \ \
           / /             | |             \ \
          / /              | |              \ \
         / /               | |               \ \
        / /             ___|_|_O_             \ \      <--   -1.4660
       / /             |___|_|___|             \ \
      / /                  | |                  \ \
    +---------------------+---+---------------------+  <--   -1.6000
                          GROUND
