DAKA Site Information Form (site log)
     International GPS Service
     See Instructions at:
       ftp://igscb.jpl.nasa.gov/pub/station/general/sitelog_instr.txt

0.   Form

     Prepared by (full name)  : Markus Ramatschi and Boubakar Barry
     Date Prepared            : 2004-01-14
     Report Type              : UPDATE
     If Update:
      Previous Site Log       : daka_20030903.log
      Modified/Added Sections : 3.1, 3.2


1.   Site Identification of the GNSS Monument

     Site Name                : Dakar; Universite Cheick Anto Diop
     Four Character ID        : daka
     Monument Inscription     : 
     IERS DOMES Number        : 34106M001
     CDP Number               : (A4)
     Monument Description     : PILLAR
       Height of the Monument : 0.8 m
       Monument Foundation    : ROOF
       Foundation Depth       : (m)
     Marker Description       : BRASS NAIL
     Date Installed           : 2002-03-21T12:00Z
     Geologic Characteristic  : (BEDROCK/CLAY/CONGLOMERATE/GRAVEL/SAND/etc)
       Bedrock Type           : (IGNEOUS/METAMORPHIC/SEDIMENTARY)
       Bedrock Condition      : (FRESH/JOINTED/WEATHERED)
       Fracture Spacing       : (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             : Dakar
     State or Province        : 
     Country                  : Senegal
     Tectonic Plate           : African plate
     Approximate Position (ITRF)
       X coordinate (m)       : 5886435.5704  
       Y coordinate (m)       : -1852014.7801
       Z coordinate (m)       : 1606349.4404
       Latitude (N is +)      :  +144105.86
       Longitude (E is +)     : -0172753.40
       Elevation (m,ellips.)  :  63.1
     Additional Information   : (multiple lines)


3.   GNSS Receiver Information

3.1  Receiver Type            : AOA SNR-8000 ACT
     Satellite System         : GPS
     Serial Number            : 2003
     Firmware Version         : 3.3.32.3
     Elevation Cutoff Setting : 3
     Date Installed           : 2002-03-21T12:00Z
     Date Removed             : 2004-01-13T15:00Z
     Temperature Stabiliz.    : none
     Additional Information   : (multiple lines)

3.2  Receiver Type            : ASHTECH Z-XII3
     Satellite System         : GPS
     Serial Number            : LP00791
     Firmware Version         : CC00
     Elevation Cutoff Setting : 3
     Date Installed           : 2004-01-14T00:00Z
     Date Removed             : (CCYY-MM-DDThh:mmZ)
     Temperature Stabiliz.    : none
     Additional Information   : (multiple lines)

3.x  Receiver Type            : (A20, from rcvr_ant.tab; see instructions)
     Satellite System         : (GPS/GLONASS/GPS+GLONASS)
     Serial Number            : (A5)
     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
     Serial Number            : 368
     Antenna Reference Point  : BPA
     Marker->ARP Up Ecc. (m)  : 0.046
     Marker->ARP North Ecc(m) : 0.000
     Marker->ARP East Ecc(m)  : 0.000
     Alignment from True N    : 0
     Antenna Radome Type      : NONE
     Radome Serial Number     : 
     Antenna Cable Type       : (vendor & type number)
     Antenna Cable Length     : 26
     Date Installed           : 2002-03-21T12:00Z
     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        : 
       Effective Dates        : 
       Notes                  : 

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     : (GPS/GLONASS/DORIS/PRARE/SLR/VLBI/TIME/etc)
       Status                 : (PERMANENT/MOBILE)
       Effective Dates        : (CCYY-MM-DD/CCYY-MM-DD)
       Notes                  : (multiple lines)

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   : PTU200 Class A
       Manufacturer           : Vaisala
       Serial Number          : U4850002
       Data Sampling Interval : 600
       Accuracy (% rel h)     : 3
       Aspiration             : UNASPIRATED
       Height Diff to Ant     : -5.3 m
       Calibration date       : 2001-02-12
       Effective Dates        : 2002-03-21/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        : 2002-03-21/CCYY-MM-DD
       Notes                  : (multiple lines)

8.2.1 Pressure Sensor Model   : PTU200 Class A
       Manufacturer           : Vaisala
       Serial Number          : U4850002
       Data Sampling Interval : 600
       Accuracy               : 0.1
       Height Diff to Ant     : -8.0 m
       Calibration date       : 2001-02-12
       Effective Dates        : 2002-03-21/2003-15-02
       Notes                  : (multiple lines)

8.2.1 Pressure Sensor Model   : PTU200 Class A
       Manufacturer           : Vaisala
       Serial Number          : X3710008
       Data Sampling Interval : 600
       Accuracy               : 0.1
       Height Diff to Ant     : -8.0 m
       Calibration date       : CCYY-MM-DD
       Effective Dates        : 2003-15-03/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      : 
       Manufacturer           : PTU200 Class A
       Serial Number          : U4850002
       Data Sampling Interval : 600
       Accuracy               : 0.1
       Aspiration             : UNASPIRATED
       Height Diff to Ant     : -5.3 m
       Calibration date       : 2001-02-12
       Effective Dates        : 2002-03-21/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  : 
       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)

8.4.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   : (multiple lines)

8.5.x Other Instrumentation   : (multiple lines)


9.  Local Ongoing Conditions Possibly Affecting Computed Position

9.1.1 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)

9.1.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       : (METAL ROOF/DOME/VLBI ANTENNA/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/BUILDLINGS/etc)
       Effective Dates        : (CCYY-MM-DD/CCYY-MM-DD)
       Additional Information : (multiple lines)

9.3.x Signal Obstructions     : (TREES/BUILDLINGS/etc)
       Effective Dates        : (CCYY-MM-DD/CCYY-MM-DD)
       Additional Information : (multiple lines)

10.  Local Episodic Effects Possibly Affecting Data Quality

10.1 Date                     : (CCYY-MM-DD/CCYY-MM-DD)
     Event                    : (TREE CLEARING/CONSTRUCTION/etc)

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

11.   On-Site, Point of Contact Agency Information

     Agency                   : Universite Cheikh Anta Diop
     Preferred Abbreviation   : UCAD
     Mailing Address          : 5353 Dakar-Fann SENEGAL
     Primary Contact
       Contact Name           : Boubakar Barry
       Telephone (primary)    : (+221)824-1932
       Telephone (secondary)  : 
       Fax                    : (+221)-825-6576
       E-mail                 : barry@ucad.sn
     Secondary Contact
       Contact Name           : 
       Telephone (primary)    : 
       Telephone (secondary)  : 
       Fax                    : 
       E-mail                 : 
     Additional Information   : (multiple lines)


12.  Responsible Agency (if different from 11.)

     Agency                   : GFZ Potsdam
     Preferred Abbreviation   : GFZ
     Mailing Address          : Telgrafenberg A17 D-14473 Potsdam
     Primary Contact
       Contact Name           : Markus Ramatschi
       Telephone (primary)    : (+49)-331-2881746
       Telephone (secondary)  : 
       Fax                    : (+49)-331-2881747
       E-mail                 : maram@gfz-potsdam.de
     Secondary Contact
       Contact Name           : Thomas Nischan 
       Telephone (primary)    : (+49)-331-2881756
       Telephone (secondary)  : 
       Fax                    : (+49)-331-2881111
       E-mail                 : nisn@gfz-potsdam.de 
     Additional Information   : (multiple lines)


13.  More Information

     Primary Data Center      : CDDIS
     Secondary Data Center    : BKG
     URL for More Information : www.gfz-potsdam.de/pb1/igs/igs_stat/daka.htm
     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


             TURBOROGUE: DORNE MARGOLIN T

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                     /     +     \                        <--  0.128  L2

                    |      +      |                       <--  0.110  L1

  +--------------------------------------------------+    <--  0.102
TCR
  |                                                  |
  |                                                  |
  |                                                  |
  |                                                  |
+-+--------------------------------------------------+-+  <--  0.038
+-------------------+-------------+--------------------+  <--  0.035
BCR
                    |             |
                    |             |
                    +------x------+                       <--  0.000
ARP

<--                      0.381                       -->


   ARP: Antenna Reference Point
   L1 : L1 Phase Center                   L2 : L2 Phase Center
   TCR: Top of Chokering                  BCR: Bottom of Chokering