VIS000SWE 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)  : SWEPOS Control Centre
     Date Prepared            : 2022-12-08
     Report Type              : UPDATE
     If Update:
      Previous Site Log       : vis000swe_20200708.log
      Modified/Added Sections : 3.21, 3.22


1.   Site Identification of the GNSS Monument

     Site Name                : Visby
     Four Character ID        : VIS0
     Monument Inscription     : Visby SWEPOS 1993
     IERS DOMES Number        : 10423M001
     CDP Number               : (A4)
     Monument Description     : PILLAR
       Height of the Monument : (m)
       Monument Foundation    : (STEEL RODS, CONCRETE BLOCK, ROOF, etc)
       Foundation Depth       : (m)
     Marker Description       : (CHISELLED CROSS/DIVOT/BRASS NAIL/etc)
     Date Installed           : 1993-08-01
     Geologic Characteristic  : BEDROCK
       Bedrock Type           : (IGNEOUS/METAMORPHIC/SEDIMENTARY)
       Bedrock Condition      : FRESH
       Fracture Spacing       : over 200 cm
       Fault zones nearby     : (YES/NO/Name of the zone)
         Distance/activity    : (multiple lines)
     Additional Information   : Swedish permanent GPS Network (SWEPOS)
                              : The same monument and antenna has been used for
                              : the IGEX/IGLOS-site VS0G up to 2003-08-19


2.   Site Location Information

     City or Town             : Visby
     State or Province        : N/A
     Country                  : Sweden
     Tectonic Plate           : EURASIAN
     Approximate Position (ITRF)
       X coordinate (m)       : 3246470.561
       Y coordinate (m)       : 1077900.313
       Z coordinate (m)       : 5365277.902
       Latitude (N is +)      : +573913.92
       Longitude (E is +)     : +0182202.32
       Elevation (m,ellips.)  : 79.8
     Additional Information   : SWEREF 99 (Swedish realisation of ETRS89).


3.   GNSS Receiver Information

3.1  Receiver Type            : ROGUE SNR-8100
     Satellite System         : GPS
     Serial Number            : T-253
     Firmware Version         : 2.8
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 1993-08-01T00:00Z
     Date Removed             : 1993-08-01T00:01Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : Elevation cutoff setting unknown.

3.2  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 845
     Firmware Version         : 8M
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 1993-08-01T00:01Z
     Date Removed             : 1994-10-20
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : Elevation cutoff setting unknown.

3.3  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 599
     Firmware Version         : 1E00
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 1994-10-20
     Date Removed             : 1995-06-01
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : Elevation cutoff setting unknown.

3.4  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 593
     Firmware Version         : 1E00
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 1995-06-01
     Date Removed             : 1995-12-12
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : Elevation cutoff setting unknown.

3.5  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 593
     Firmware Version         : 1F00
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 1995-12-12
     Date Removed             : 1996-01-10
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : Firmware upgrade.
                              : Elevation cutoff setting unknown.

3.6  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 845
     Firmware Version         : 1G00
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 1996-01-10
     Date Removed             : 1998-04-29
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : Elevation cutoff setting unknown.

3.7  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 769
     Firmware Version         : 1G00
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 1998-04-29T00:00Z
     Date Removed             : 1998-10-29T00:01Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.8  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 769
     Firmware Version         : 1I00
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 1998-10-29T00:01Z
     Date Removed             : 1999-02-02
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.9  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 839
     Firmware Version         : CB00
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 1999-02-02
     Date Removed             : 1999-06-30
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.10 Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 839
     Firmware Version         : CC00
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 1999-06-30
     Date Removed             : 2003-08-19
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : Firmware upgrade

3.11 Receiver Type            : JPS E_GGD
     Satellite System         : GPS+GLO
     Serial Number            : AE5WWG82EWW
     Firmware Version         : 2.2 Apr,05,2002 p2
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2003-08-19
     Date Removed             : 2004-07-21T10:45Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.12 Receiver Type            : JPS E_GGD
     Satellite System         : GPS+GLO
     Serial Number            : AE5WWG82EWW
     Firmware Version         : 2.3 Apr,28,2004 p4
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2004-07-21T10:45Z
     Date Removed             : 2007-05-22T14:50Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.13 Receiver Type            : JPS EGGDT
     Satellite System         : GPS+GLO
     Serial Number            : 8R80VL8HO1S
     Firmware Version         : 2.5 Jun,22,2005 p1
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2007-05-22T16:55Z
     Date Removed             : 2007-11-14
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.14 Receiver Type            : JPS EGGDT
     Satellite System         : GPS+GLO
     Serial Number            : 8R80VL8HO1S
     Firmware Version         : 2.6.0 Apr,18,2007
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2007-11-14
     Date Removed             : 2008-05-15T07:20Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : Firmware upgrade

3.15 Receiver Type            : JPS EGGDT
     Satellite System         : GPS+GLO
     Serial Number            : 8R80VL8HO1S
     Firmware Version         : 2.6.1 Jan,10,2008
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2008-05-15T07:30Z
     Date Removed             : 2014-01-14T17:00Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : Firmware upgrade

3.16 Receiver Type            : JPS EGGDT
     Satellite System         : GPS+GLO
     Serial Number            : 8R80VL8HO1S
     Firmware Version         : 2.6.1 Jan,10,2008
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2014-01-14T17:00Z
     Date Removed             : 2014-05-22T14:00Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.17 Receiver Type            : JAVAD TRE_G3TH DELTA
     Satellite System         : GPS+GLO
     Serial Number            : 00454
     Firmware Version         : 3.5.5 Mar,03,2014
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2014-05-22T14:00Z
     Date Removed             : 2015-11-16T16:00Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.18 Receiver Type            : JAVAD TRE_G3TH DELTA
     Satellite System         : GPS+GLO
     Serial Number            : 00454
     Firmware Version         : 3.5.12 Nov,12,2015
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2015-11-16T16:00Z
     Date Removed             : 2017-01-26T10:00Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.19 Receiver Type            : JAVAD TRE_G3T SIGMA
     Satellite System         : GPS+GLO
     Serial Number            : 01804
     Firmware Version         : 3.5.12 Nov,12,2015
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2017-01-26T12:00Z
     Date Removed             : 2017-06-07T16:00Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.20 Receiver Type            : JAVAD TRE_G3T SIGMA
     Satellite System         : GPS+GLO
     Serial Number            : 01804
     Firmware Version         : 3.7.1 Apr,04,2017
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2017-06-07T16:00Z
     Date Removed             : 2019-09-26T08:00Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.21 Receiver Type            : SEPT POLARX5
     Satellite System         : GPS+GLO+GAL+BDS+SBAS
     Serial Number            : 3048055
     Firmware Version         : 5.3.0
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2019-09-26T08:00Z
     Date Removed             : 2022-12-08T09:59Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.22 Receiver Type            : SEPT POLARX5
     Satellite System         : GPS+GLO+GAL+BDS+SBAS
     Serial Number            : 3048055
     Firmware Version         : 5.5.0
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2022-12-08T10:00Z
     Date Removed             : CCYY-MM-DDThh:mmZ
     Temperature Stabiliz.    : 25.0 +/- 3.0
     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        DUTD
     Serial Number            : 253
     Antenna Reference Point  : BPA
     Marker->ARP Up Ecc. (m)  :   0.0710
     Marker->ARP North Ecc(m) :   0.0000
     Marker->ARP East Ecc(m)  :   0.0000
     Alignment from True N    : 0 deg
     Antenna Radome Type      : DUTD
     Radome Serial Number     : 
     Antenna Cable Type       : (vendor & type number)
     Antenna Cable Length     : (m)
     Date Installed           : 1993-08-01
     Date Removed             : 1995-06-14
     Additional Information   : (multiple lines)

4.2  Antenna Type             : AOAD/M_T        DOME
     Serial Number            : 253
     Antenna Reference Point  : BPA
     Marker->ARP Up Ecc. (m)  :   0.0710
     Marker->ARP North Ecc(m) :   0.0000
     Marker->ARP East Ecc(m)  :   0.0000
     Alignment from True N    : 0 deg
     Antenna Radome Type      : DOME
     Radome Serial Number     : 
     Antenna Cable Type       : (vendor & type number)
     Antenna Cable Length     : (m)
     Date Installed           : 1995-06-14
     Date Removed             : 1996-06-25
     Additional Information   : (multiple lines)

4.3  Antenna Type             : AOAD/M_T        NONE
     Serial Number            : 253
     Antenna Reference Point  : BPA
     Marker->ARP Up Ecc. (m)  :   0.0710
     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     : (m)
     Date Installed           : 1996-06-25
     Date Removed             : 1996-11-08
     Additional Information   : (multiple lines)

4.4  Antenna Type             : AOAD/M_T        OSOD
     Serial Number            : 253
     Antenna Reference Point  : BPA
     Marker->ARP Up Ecc. (m)  :   0.0710
     Marker->ARP North Ecc(m) :   0.0000
     Marker->ARP East Ecc(m)  :   0.0000
     Alignment from True N    : 0 deg
     Antenna Radome Type      : OSOD
     Radome Serial Number     : 
     Antenna Cable Type       : RG214
     Antenna Cable Length     : 16 m
     Date Installed           : 1996-11-08
     Date Removed             : CCYY-MM-DDThh:mmZ
     Additional Information   : (multiple lines)

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        : 1991-07-01/1996-05-05
       Notes                  : (multiple lines)

6.2  Standard Type            : EXTERNAL RUBIDIUM
       Input Frequency        : 10 MHz
       Effective Dates        : 1996-05-05/2014-05-20
       Notes                  : CLOCK STEERING set to N 2000-12-06 12:00 UT, for
                              : Ashtech receiver.

6.3  Standard Type            : INTERNAL
       Input Frequency        : (if external)
       Effective Dates        : 2014-05-20/2014-05-22
       Notes                  : (multiple lines)

6.4  Standard Type            : EXTERNAL RUBIDIUM
       Input Frequency        : 10 MHz
       Effective Dates        : 2014-05-22/2018-02-14
       Notes                  : Symmetricom 8040C

6.5  Standard Type            : INTERNAL
       Input Frequency        : (if external)
       Effective Dates        : 2018-02-14/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     : TIDE GAUGE
       Status                 : PERMANENT
       Effective Dates        : 1916-01-01/CCYY-MM-DD
       Notes                  : Visby, PSMSL country/station code 050/096 c. 5-6
                              : km from VIS0.

7.2  Instrumentation Type     : GPS/GLONASS
       Status                 : PERMANENT
       Effective Dates        : 1998-08-01/2003-08-19
       Notes                  : IGLOS site VS0G utilized the same pillar
                              : and antenna as VIS0.

7.3  Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2004-05-26/2004-05-27
       Notes                  : (multiple lines)

7.4  Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2005-10-07/2005-10-08
       Notes                  : (multiple lines)

7.5  Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2007-05-21/2007-05-24
       Notes                  : Observation performed by Lantmateriet.

7.6  Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2009-05-18/2009-05-20
       Notes                  : Observation performed by Lantmateriet.

7.7  Instrumentation Type     : GNSS
       Status                 : PERMANENT
       Effective Dates        : 2011-05-18/CCYY-MM-DD
       Notes                  : EPN station VIS6 10423M002.

7.8  Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2011-09-27/2011-09-29
       Notes                  : Observation performed by Lantmateriet.

7.9  Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2013-06-11/2013-06-13
       Notes                  : Observation performed by Lantmateriet.

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

10.1  Date                    : 2012-06-01/2012-06-01
      Event                   : The radome was removed 08:05-11:30 UTC for local
                              : tie/stability measurements

10.2  Date                    : 2020-07-07/2020-07-07
      Event                   : The radome was removed 14:10-16:10 UTC for local
                              : tie/stability measurements

10.x  Date                    : (CCYY-MM-DD/CCYY-MM-DD)
      Event                   : (TREE CLEARING/CONSTRUCTION/etc)


11.  On-Site, Point of Contact Agency Information

     Agency                   : Lantmäteriet, the Swedish mapping, cadastral
                              : and land registration authority
     Preferred Abbreviation   : LMV
     Mailing Address          : Lantmäteriet
                              : SE-801 82 Gävle
                              : Sweden
     Primary Contact
       Contact Name           : SWEPOS Control Centre
       Telephone (primary)    : +46 26 63 37 53
       Telephone (secondary)  : 
       Fax                    : 
       E-mail                 : swepos@lm.se
     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
       Site Diagram           : Y
       Horizon Mask           : (Y or URL)
       Monument Description   : Y
       Site Pictures          : Y
     Additional Information   : (multiple lines)
     Antenna Graphics with Dimensions

AOAD/M_T

                         -----
                     /     +     \                        <-- 0.128 L2
                    |      +      |                       <-- 0.110 L1
  +--------------------------------------------------+    <-- 0.102 TCR
  |                                                  |
  |                                                  |
  |                                                  |
  |                                                  |
+-+--------------------------------------------------+-+  <-- 0.038
+-------------------+-------------+--------------------+  <-- 0.035 BCR
                    |             |
                   =|             |
                    +------x------+                       <-- 0.000 ARP

<--                      0.381                       -->

ARP: Antenna Reference Point