MDOA Site Information Form
     GPS/GLONASS Campaign IGEX98


0.   Form

     Prepared by (full name)  : Kevin W. Key
     Date Prepared            : 25-NOV-1998
     Report Type              : FINAL UPDATE
     Prepared Using           :


1.   Site Identification of the GPS/GLONASS Monument

     Site Name                : McDonald Observatory Mobile VLBI and SLR mark
     Four Character ID        : MDOA
     Monument Inscription     : 7850-1988
     IERS DOMES Number        : 40442M008
     CDP Number               : 
     Monument Description     : BRASS PLATE
     Date Installed           : 19-NOV-1998 19:00 UT
     Geologic Characteristic  : 
       Bedrock Type           : 
       Bedrock Condition      : 
       Fracture Spacing       : 
       Notes                  : 
     Additional Information   : This marker is a local tie to MDO1.  See
                                the MDO1.log from the IGS for more information.


2.   Site Location Information

     City or Town             : Fort Davis
     State or Province        : Texas
     Country                  : USA
     Tectonic Plate           : North American
     Approximate Position
       X coordinate (m)       : -1330008.191 m
       Y coordinate (m)       : -5328391.593 m
       Z coordinate (m)       :  3236502.715 m
       Latitude (deg)         :  30.6805 N
       Longitude (deg)        : 255.9850 E
       Elevation (m)          : 2004.505 m
     Additional Information   : The position given above is the ITRF96
                                position at epoch 1997 as derived from the
                                log file of MDO1.  The velocity for this
                                site can be taken as equivalent to MDO1.


3.   Receiver Information

3.1  Receiver Type            : Javad Positioning Systems Legacy
     Satellite System         : GPS+GLONASS
     Serial Number            : MZX02363607
     Firmware Version         : v0.36
     Firmware Updated To      : v0.52    12-DEC-1998
     Firmware Updated To      : v1.4     24-FEB-1999
     Firmware Updated To      : v1.5  patch level 3   12-APR-1999
     Date Installed           : 19-NOV-1998 19:00 UT
     Date Removed             : 24-APR-1999 23:53 UT
     Additional Information   : 


4.   Antenna Information

4.x  Antenna Type             : JPS RegAnt Single Depth Choke Ring (External)
     Serial Number            : MZX0000022
     Antenna Height (m)       : 1.0024 m
     Antenna Reference Point  : ARP (See below)
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 19-NOV-1998 15:00 UT
     Date Removed             : 24-APR-1999 23:53 UT
     Additional Information   : NGS Classification: JPSRegant_SD_E

5.   Local Site Ties

5.x  Monument Name            : McDonald VLBA Site (MDO1)
     Site Ref CDP Number      : 
     Site Ref Domes Number    : 40442M012
     Differential Components from GPS/GLONASS Marker to Site Reference (ITRS)
       dx (m)                 :  9.5212
       dy (m)                 : -1.7953
       dz (m)                 :  1.4841
     Accuracy (mm)            :
     Date Measured            : 17-MAR-1993 UT
     Additional Information   : This tie is from MDOA to MDO1 and is the 
                                negative of the tie given in the MDO1.log 
                                file.


6.   Frequency Standard

6.1  Standard Type            : INTERNAL -  QUARTZ ?
       Frequency              :
       Effective Dates        : 
       Notes                  : 


7.   Collocation Information

7.1  Instrumentation Type     : GPS/GLONASS/SLR/VLBI
       Status                 : PERMANENT
       Effective Dates        : 
       Notes                  : Several local markers surround MDO1.


8.   Meteorological Instrumentation

8.1  Humidity Sensor Model    :
       Manufacturer           :
       Data Frequency         :
       Accuracy (% rel h)     : 
       Effective Dates        : 
       Notes                  : 

8.2  Pressure Sensor Model    :
       Manufacturer           :
       Data Frequency         :
       Accuracy (mbar)        : 
       Height Diff to Ant (m) : 
       Effective Dates        : 
       Notes                  : 

8.3  Temperature Sensor Model :
       Manufacturer           :
       Data Frequency         :
       Accuracy (deg C)       : 
       Effective Dates        : 
       Notes                  : 

8.4  Water Vapor Radiometer   :
       Manufacturer           :
       Distance to Antenna (m): 
       Elev Diff to Ant (m)   : 
       Effective Dates        : 
       Notes                  : 

8.5  Other Instrumentation    : 


10.  Responsible Agency (if different from 9.)

     Agency                   : Center For Space Research
     Mailing Address          : University of Texas at Austin
                                3925 W. Braker Lane, Suite 200
                                Austin, TX 78759-5321
     Primary Contact
       Contact Name           : Steve Nerem
       Telephone (primary)    : (512) 471 -
       Telephone (secondary)  : (512) 471 -
       Fax                    : (512) 471 - 3570
       E-mail                 : nerem@csr.utexas.edu
     Secondary Contact
       Contact Name           : Kevin W. Key
       Telephone (primary)    : (512) 471 - 7863
       Telephone (secondary)  : (512) 471 -
       Fax                    : (512) 471 - 3570
       E-mail                 : key@csr.utexas.edu
     Additional Information   : 


11.  More Information

     URL for More Information :
     Hardcopy on File
       Site Map               : Y
       Site Diagram           : Y
       Horizon Mask           :
       Monument Description   : 
       Site Pictures          : Y
     Additional Information   : Javad Positioning Systems Antenna is encased
                                in a hard plastic shell as shown below.

     Antenna Graphics with Dimensions

                +-------------------------+ <--------------Plastic Housing for
               /    -------------------    \               Antenna/Choke Ring
              /    /         +         \    \                <-- 0.1196 L2
   +---------+     |         +         |     +---------+     <-- 0.1060 L1
  | +-------------------------------------------------+ |    <-- 0.xxxx TCR
 /  |                                                 |  \               
|   |                                                 |   |              
|   |                                                 |   |              
|   |                                                 |   |              
 \+-----------------------------------------------------+/                   
 |+-----------------------------------------------------+|   <-- 0.xxxx BCR
  \______________  |                   |  ______________/
                 \ |                   | /                
                  \+---------x---------+/                    <-- 0.0000 ARP

12.  Local Events Possibly Affecting Computed Position

12.x  Date                    : (dd-MMM-yyyy hh:mm UT)
      Event                   : (multiple lines)