ONSA00SWE Site Information Form (site log)
     International GNSS Service
     See Instructions at:
       https://files.igscb.org/pub/station/general/sitelog_instr.txt


0.   Form

     Prepared by (full name)  : SWEPOS Control Centre (swepos@lm.se)
     Date Prepared            : 2022-12-08
     Report Type              : UPDATE
     If Update:
      Previous Site Log       : onsa00swe_20220929.log
      Modified/Added Sections : 3.14, 3.15, 11, 12


1.   Site Identification of the GNSS Monument

     Site Name                : ONSALA
     Four Character ID        : ONSA
     Monument Inscription     : ONSALA 301
     IERS DOMES Number        : 10402M004
     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           : 1991-07-01
     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   : GABBRO
                              : Swedish permanent GPS Network (SWEPOS)
                              : The same monument and antenna has been used for
                              : the IGEX/IGLOS-site OS0G up to 2003-08-19


2.   Site Location Information

     City or Town             : Onsala
     State or Province        : N/A
     Country                  : Sweden
     Tectonic Plate           : EURASIAN
     Approximate Position (ITRF)
       X coordinate (m)       : 3370658.832
       Y coordinate (m)       : 711876.939
       Z coordinate (m)       : 5349786.745
       Latitude (N is +)      : +572343.07
       Longitude (E is +)     : +0115531.85
       Elevation (m,ellips.)  : 45.5
     Additional Information   : SWEREF 99 (Swedish realisation of ETRS89).
                              : Swedish westcoast, near Gothenburg


3.   GNSS Receiver Information

3.1  Receiver Type            : ROGUE SNR-8000
     Satellite System         : GPS
     Serial Number            : 199
     Firmware Version         : 2.8
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 1993-07-01
     Date Removed             : 1999-02-01
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : Elevation cutoff setting unknown

3.2  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 834
     Firmware Version         : 1F60
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 1999-02-02
     Date Removed             : 1999-07-03
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.3  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : 834
     Firmware Version         : CC00
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 1999-07-03
     Date Removed             : 2003-08-19
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.4  Receiver Type            : JPS LEGACY
     Satellite System         : GPS+GLO
     Serial Number            : MT301613113
     Firmware Version         : 2.3 May,13,2003 p1
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2003-08-19
     Date Removed             : 2004-03-10T16:00Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.5  Receiver Type            : JPS E_GGD
     Satellite System         : GPS+GLO
     Serial Number            : AGOMET9N0N4
     Firmware Version         : 2.3 Feb,17,2004 p4b2
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2004-03-10T16:00Z
     Date Removed             : 2007-11-01T08:30Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.6  Receiver Type            : JPS E_GGD
     Satellite System         : GPS+GLO
     Serial Number            : AG72YY6YV40
     Firmware Version         : 2.3 Feb,17,2004 p4b2
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2007-11-01T08:40Z
     Date Removed             : 2008-05-15T14:30Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.7  Receiver Type            : JPS E_GGD
     Satellite System         : GPS+GLO
     Serial Number            : AG72YY6YV40
     Firmware Version         : 2.6.1 Jan,10,2008
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2008-05-15T14:40Z
     Date Removed             : 2014-01-14T17:00Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : Firmware upgrade

3.8  Receiver Type            : JPS E_GGD
     Satellite System         : GPS+GLO
     Serial Number            : AG72YY6YV40
     Firmware Version         : 2.6.1 Jan,10,2008
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2014-01-14T17:00Z
     Date Removed             : 2015-05-05T14:00Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.9  Receiver Type            : JAVAD TRE_G3TH DELTA
     Satellite System         : GPS+GLO
     Serial Number            : 00323
     Firmware Version         : 3.5.6 Aug,14,2014
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2015-05-05T14:00Z
     Date Removed             : 2015-07-08T12:00Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.10 Receiver Type            : JAVAD TRE_G3TH DELTA
     Satellite System         : GPS+GLO
     Serial Number            : 00323
     Firmware Version         : 3.5.9 Apr,21,2015
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2015-07-08T12:00Z
     Date Removed             : 2015-11-17T10:00Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.11 Receiver Type            : JAVAD TRE_G3TH DELTA
     Satellite System         : GPS+GLO
     Serial Number            : 00323
     Firmware Version         : 3.5.12 Nov,12,2015
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2015-11-17T10:00Z
     Date Removed             : 2019-04-02T10:00Z
     Temperature Stabiliz.    : 25.0 +/- 3.0
     Additional Information   : (multiple lines)

3.12 Receiver Type            : SEPT POLARX5TR
     Satellite System         : GPS+GLO+GAL+BDS+SBAS
     Serial Number            : 3046506
     Firmware Version         : 5.2.0
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2019-04-02T10:00Z
     Date Removed             : 2019-09-30T10:00Z
     Temperature Stabiliz.    : 23.0 +/- 1.0
     Additional Information   : (multiple lines)

3.13 Receiver Type            : SEPT POLARX5TR
     Satellite System         : GPS+GLO+GAL+BDS+SBAS
     Serial Number            : 3046506
     Firmware Version         : 5.3.0
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2019-09-30T10:00Z
     Date Removed             : 2021-03-19T12:00Z
     Temperature Stabiliz.    : 23.0 +/- 1.0
     Additional Information   : (multiple lines)

3.14 Receiver Type            : SEPT POLARX5TR
     Satellite System         : GPS+GLO+GAL+BDS+SBAS
     Serial Number            : 3046506
     Firmware Version         : 5.4.0
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2021-03-19T12:00Z
     Date Removed             : 2022-12-08T09:59Z
     Temperature Stabiliz.    : 23.0 +/- 1.0
     Additional Information   : (multiple lines)

3.15 Receiver Type            : SEPT POLARX5TR
     Satellite System         : GPS+GLO+GAL+BDS+SBAS
     Serial Number            : 3046506
     Firmware Version         : 5.5.0
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2022-12-08T10:00Z
     Date Removed             : CCYY-MM-DDThh:mmZ
     Temperature Stabiliz.    : 23.0 +/- 1.0
     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_B        DUTD
     Serial Number            : 20
     Antenna Reference Point  : BCR
     Marker->ARP Up Ecc. (m)  :   0.9950
     Marker->ARP North Ecc(m) :   0.0000
     Marker->ARP East Ecc(m)  :   0.0000
     Alignment from True N    : 180 deg
     Antenna Radome Type      : DUTD
     Radome Serial Number     : 
     Antenna Cable Type       : (vendor & type number)
     Antenna Cable Length     : (m)
     Date Installed           : 1991-07-01
     Date Removed             : 1999-02-01
     Additional Information   : Antenna correctly oriented towards
                              : North on 1994-09-11.

4.2  Antenna Type             : AOAD/M_B        OSOD
     Serial Number            : 020
     Antenna Reference Point  : BCR
     Marker->ARP Up Ecc. (m)  :   0.9950
     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       : (vendor & type number)
     Antenna Cable Length     : (m)
     Date Installed           : 1999-02-02
     Date Removed             : 2013-08-28T12:00Z
     Additional Information   : (multiple lines)

4.3  Antenna Type             : AOAD/M_B        NONE
     Serial Number            : 020
     Antenna Reference Point  : BCR
     Marker->ARP Up Ecc. (m)  :   0.9950
     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           : 2013-08-28T12:00Z
     Date Removed             : 2013-11-06T13:05Z
     Additional Information   : Radome temporarily removed, due to
                              : participation in IGS Radome Experiment at
                              : Co-located Stations.

4.4  Antenna Type             : AOAD/M_B        OSOD
     Serial Number            : 020
     Antenna Reference Point  : BCR
     Marker->ARP Up Ecc. (m)  :   0.9950
     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       : (vendor & type number)
     Antenna Cable Length     : (m)
     Date Installed           : 2013-11-06T13:05Z
     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

5.1  Tied Marker Name         : ONSALA 131
     Tied Marker Usage        : VLBI
     Tied Marker CDP Number   : 7213
     Tied Marker DOMES Number : 10402S002
     Differential Components from GNSS Marker to the tied monument (ITRS)
       dx (m)                 : -52.631 m
       dy (m)                 : 40.464 m
       dz (m)                 : 43.865 m
     Accuracy (mm)            : 1 mm
     Survey method            : TRILATERATION/TRIANGULATION
     Date Measured            : 1993-04-15
     Additional Information   : Differential coordinates from the GPS
                              : monument to the reference and other
                              : monuments.
                              : The components are parallel to the
                              : XYZ-axes
                              : of the global geocentric reference
                              : system
                              : ITRF (WGS-84).

5.2  Tied Marker Name         : ONSALA 501
     Tied Marker Usage        : VLBI
     Tied Marker CDP Number   : 7211
     Tied Marker DOMES Number : 10402M006
     Differential Components from GNSS Marker to the tied monument (ITRS)
       dx (m)                 : -16.704 m
       dy (m)                 : -10.902 m
       dz (m)                 : 9.290 m
     Accuracy (mm)            : 1 mm
     Survey method            : GPS CAMPAIGN/TRILATERATION/TRIANGULATION
     Date Measured            : 1993-04-15
     Additional Information   : Differential coordinates from the GPS
                              : monument to the reference and other
                              : monuments.
                              : The components are parallel to the
                              : XYZ-axes
                              : of the global geocentric reference
                              : system
                              : ITRF (WGS-84).

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 H-MASER
       Input Frequency        : 5 MHz
       Effective Dates        : 1991-07-01/2019-04-02
       Notes                  : CLOCK STEERING has been Y since 1999-02-02.
                              : CLOCK STEERING set to N 2000-12-06 00:00 UT.
                              : AUTO-SWITCH has always been Y.
                              : Clock steering information valid for Ashtech
                              : receivers.

6.2  Standard Type            : EXTERNAL H-MASER
       Input Frequency        : 10 MHz
       Effective Dates        : 2019-04-02/CCYY-MM-DD
       Notes                  : KVARZ CH1-75A

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     : VLBI
       Status                 : PERMANENT
       Effective Dates        : 1980-01-01/CCYY-MM-DD
       Notes                  : Also Mobile VLBI, Gravim

7.2  Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 1993-08-07/1993-08-10
       Notes                  : (multiple lines)

7.3  Instrumentation Type     : GRAVITY
       Status                 : MOBILE
       Effective Dates        : 1995-09-26/1995-09-27
       Notes                  : (multiple lines)

7.4  Instrumentation Type     : GRAVITY
       Status                 : MOBILE
       Effective Dates        : 1995-09-29/1995-10-01
       Notes                  : (multiple lines)

7.5  Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 1998-06-13/1998-06-14
       Notes                  : (multiple lines)

7.6  Instrumentation Type     : GLONASS/GPS
       Status                 : PERMANENT
       Effective Dates        : 1998-10-21/2003-08-19
       Notes                  : Same pillar and antenna as the GPS
                              : station.
                              : GPS site ONSA and GPS/GLONASS site OS0G
                              : have been merged into site ONSA, equipped
                              : with a GPS/GLONASS receiver.

7.7  Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2003-06-14/2003-06-15
       Notes                  : (multiple lines)

7.8  Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2003-07-15/2003-07-16
       Notes                  : (multiple lines)

7.9  Instrumentation Type     : GPS
       Status                 : PERMANENT
       Effective Dates        : 2003-08-19/CCYY-MM-DD
       Notes                  : Same pillar and antenna as the GPS/GLONASS
                              : station.

7.10 Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2004-10-25/2004-10-29
       Notes                  : (multiple lines)

7.11 Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2005-10-12/2005-10-14
       Notes                  : (multiple lines)

7.12 Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2006-10-08/2006-10-10
       Notes                  : (multiple lines)

7.13 Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2007-03-20/2007-03-22
       Notes                  : Observation performed by Lantmateriet.

7.14 Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2007-05-09/2007-05-10
       Notes                  : (multiple lines)

7.15 Instrumentation Type     : SUPERCONDUCTING GRAVITY
       Status                 : PERMANENT
       Effective Dates        : 2009-06-13/CCYY-MM-DD
       Notes                  : (multiple lines)

7.16 Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2009-06-30/2009-07-01
       Notes                  : Observation performed by Lantmateriet.

7.17 Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2009-07-02/2009-07-05
       Notes                  : Observation performed by Lantmateriet.

7.18 Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2010-06-30/2010-07-02
       Notes                  : Observation performed by Lantmateriet.

7.19 Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2010-09-20/2010-09-23
       Notes                  : Observation performed by Lantmateriet.

7.20 Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : PERMANENT
       Effective Dates        : 2011-06-29/2011-07-01
       Notes                  : Observation performed by Lantmateriet.

7.21 Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2011-07-02/2011-07-04
       Notes                  : Observation performed by Lantmateriet.

7.22 Instrumentation Type     : GNSS
       Status                 : PERMANENT
       Effective Dates        : 2012-01-28/CCYY-MM-DD
       Notes                  : EPN station ONS1 10402M007.
                              : ONS1 is also included in the IGS MGEX project.

7.23 Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2013-04-22/2013-04-24
       Notes                  : Observation performed by Lantmateriet.

7.24 Instrumentation Type     : ABSOLUTE GRAVITY
       Status                 : MOBILE
       Effective Dates        : 2013-04-29/2013-05-03
       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

8.1.1  Humidity Sensor Model  : HMP35D HUMICAP H-sensor
       Manufacturer           : VAISALA
       Serial Number          : 
       Data Sampling Interval :  1800 sec
       Accuracy (% rel h)     : 2 % rel h
       Aspiration             : (UNASPIRATED/NATURAL/FAN/etc)
       Height Diff to Ant     : 0 m
       Calibration date       : (CCYY-MM-DD)
       Effective Dates        : 1997-04-01/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  : Setra 361B
       Manufacturer           : Setra Systems
       Serial Number          : 
       Data Sampling Interval : 1800 sec
       Accuracy               : 0.5 hPa
       Height Diff to Ant     : 0 m
       Calibration date       : (CCYY-MM-DD)
       Effective Dates        : 1991-07-01/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     : HMP35D pt-100
       Manufacturer           : VAISALA
       Serial Number          : 
       Data Sampling Interval : 1800 sec
       Accuracy               : 0.1 deg C
       Aspiration             : (UNASPIRATED/NATURAL/FAN/etc)
       Height Diff to Ant     : 0 m
       Calibration date       : (CCYY-MM-DD)
       Effective Dates        : 1997-04-01/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 : Astrid
       Manufacturer           : Onsala Space Observatory
       Serial Number          : 
       Distance to Antenna    : 8 m
       Height Diff to Ant     : 0 m
       Calibration date       : (CCYY-MM-DD)
       Effective Dates        : 1991-07-01/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)

9.2.1  Multipath Sources      : MULTIPATH REDUCTION
       Effective Dates        : 1994-07-31/2013-07-04
       Additional Information : A plate of microwave absorbing
                              : material(Eccosorb) was mounted around the
                              : antenna to reduce multipath.

9.2.2  Multipath Sources      : MULTIPATH REDUCTION
       Effective Dates        : 2013-07-04/2022-09-29
       Additional Information : The microwave absorbing plate surrounding the
                              : antenna was exchanged due to ageing. The new
                              : plate is of the same type as the previous.

9.2.3  Multipath Sources      : MULTIPATH REDUCTION
       Effective Dates        : 2022-09-29/CCYY-MM-DD
       Additional Information : The microwave absorbing plate surrounding the
                              : antenna was exchanged due to ageing. The new
                              : plate is of the same type as the previous.

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                    : 2015-03-04/2015-03-04
      Event                   : Troubleshooting was performed 8:30-10:30 
                              : UTC,trying to find the cause of low data 
                              : quality.Moisture in and around the radome was 
                              : removed,contacts were examined and some other 
                              : receiversconnected to the ONSA site were 
                              : disconnected.

10.2  Date                    : 2015-03-12/2015-03-12
      Event                   : Due to troubleshooting  on station ONSA DOY 
                              : 0719-12  UTC, distributed data is 
                              : corrupt.Disabled one of three pre-amplifiers.

10.3  Date                    : 2015-05-22/2015-07-08
      Event                   : Troubleshooting and repair of pre-amplifier 
                              : inantenna. Components in pre-amplifier have 
                              : beenreplaced.

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 or URL)
       Site Diagram           : Y
       Horizon Mask           : Y
       Monument Description   : Y
       Site Pictures          : Y
     Additional Information   : (multiple lines)
     Antenna Graphics with Dimensions

AOAD/M_B  (Allen Osborne Design)

                         -----
                     /     +     \                      <-- 0.096 L2
                    |      +      |                     <-- 0.078 L1
  +-----------------+-------------+------------------+  <-- 0.070 TCR
  |                                                  |
  |                                                  |
  |                                                  |
  |                                                  |
  |                                                  |
  +-----------------+------x------+------------------+  <-- 0.000 ARP
                    |             |
                    +-------------+                     <-- -0.011
                          ||  ||

  <--                    0.351                     -->


ARP: Antenna Reference Point