Subject: [IGSMAIL-0506] ALGO - TRACKING PROBLEMS
From: Robert Duval / NRCan
Date: Thu, 24 Feb 1994 13:48:30 PST

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IGS Electronic Mail      Thu Feb 24 13:48:30 PST 1994      Message Number 0506
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Author: Robert Duval / NRCan
Subject: ALGO - TRACKING PROBLEMS

Station ALGO Domes # 40104M002

Because of receiver malfunction no data have been available from ALGO since
Feb 23 (DOY 54) 12:00 UT.  The receiver is not expected to be replaced
until Feb 28 (DOY 59).  Data from an alternate station ALGO REF A (ALGA) at
the same site is made available as a temporary replacement. The data from
ALGA will be forwarded to CDDIS and is available from NRCan anonymous FTP 
address macs.geod.emr.ca under the sub-directory /pub/gps/rinex/algorefa.  

COORDINATES (ITRF92 epoch 1994.0)

ALGA (ALGO REF A) :       X:    918127.568 
                          Y:  -4346061.957
                          Z:   4561984.264

ALGO (# 40104M002):       X:    918129.578 
                          Y:  -4346071.246
                          Z:   4561977.828

DIFFERENTIAL COORDINATES
                                                dX        dY       dZ
ALGA (ALGO REF A) to ALGO (# 40104M002) :      2.010    -9.289    -6.436  

Note that ALGA is operating on the same H-Maser clock as ALGO

Additional info on ALGA follows

   **************************************
      ALGO REF A (ALGA) SITE INFORMATION
   **************************************

   0. Form

          Prepared by            : ROBERT DUVAL        
          date                   : 24-FEB-94
          Report type            : NEW       

   1. Site Identification of the GPS Monument 

          Site name              : ALGO REF A      
          4 char ID              : ALGA    
          Monu ins               : 683100A 
          Iers domes no          :           
          CDP Number             :       
          Date                   : 16-FEB-94
          Additional Information : Monument is a brass tablet in bedrock  

                                  
   2. Site Location:

          City                   : ALGONQUIN PARK                
          Country                : CANADA         
          Tectonic Plate         : NOAM    
          Additional Information : Site known as Algonquin Space Complex, 
                                   formerly Algonquin Radio Astronomical
                                   Observatory (ARO)                          

   3. GPS Receiver(s): 
      
          Type                   : ROGUE SNR-8         
          Serial Number          : R115           
          Firmware Version       : MEENIX 7.5                    
          Date                   : 16-FEB-94 20:00:00  to  Present           

   4. GPS Antenna(s): 
      
          Type                   : DORNE-MARGOLIN B    
          Serial Number          : 111            
          Vertical Antenna Height: 1.503
          Antenna Ref. Point     : BOTTOM OF CHOKE RINGS         
          Date                   : 16-FEB-94 20:00:00  to  Present           

     The antenna height is measured from the GPS monument to the antenna
     reference point (ARP) as it has been defined in the graphic (item 10).

   5. Local Site Tie(s):

 Monument  CDP   DOMES            Components          Source   Accur.   Date
 Inscrip.  No.    No.       dX        dY       dZ               mm    yy_mm_dd

 883160   ALGO  40104M002   2.010   -9.289    -6.436               PROVISIONAL      

     Differential coordinates are 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).

     Accuracy: estimated accuracy of local survey (millimeters).

   6. Frequency standard - Mark with  "X"  

          H-maser / X /   Cesium /  /   Rubidium /  /   Internal/  /
          Date                   : 16-FEB-94 20:00:00

   7. Collocation  ( "P" for permanent, "M" for mobile collocation)

          SLR   / M /   VLBI  / P /   DORIS  /   /   PRARE  /   /
          Other (specify)         :                     

   8. On site Agency Information 

          Agency                  : GEODETIC SURVEY OF CANADA               
          Contact                 : Robert Duval        
          Address                 : 615 Booth St., Ottawa, Ont.
                                    CANADA, K1A 0E9                  
          Telephone               : 613-947-2786   
          E-mail                  : [email-masked]   
          Fax                     : 613-995-3215        

   9. Responsible Operations Agency:  see No. 8 

   10. Graphic(s) corresponding to antenna type on site

        Rogue:  DORNE MARGOLIN B  (Allen Osborne Design)

                      --------                          
                   /      +     \                   <-- 0.096 L2
                  |       +      |                  <-- 0.078 L1
   +--------------+--------------+--------------+   <-- 0.070 TCR
   |                                            | 
   |                                            | 
   |                                            | 
   |                                            | 
   +---------------------x----------------------+   <-- 0.000 ARP = BCR
                  |              |              
                  +--------------+                  <-- -0.011
                      | |  | |                     
   <--               0.351                    -->

 

    Acronyms:
    ARP: Antenna Reference Point
    L1 : L1 Phase Center             L2 : L2 Phase Center 
    TCR: Top of Choke ring           BCR: Bottom of Choke ring
    TGP: Top of Ground Plane         BGP: Bottom of Ground Plane
    TPA: Top of Preamplifier         BPA: Bottom of Preamplifier

  ********************* END OF FORM ***********************

-- 
Robert Duval

Geodetic Survey Division               Tel:    (613) 947-2786
Natural Resources Canada (NRCan)       Fax:    (613) 995-3215
615 Booth Street                       E-mail: [email-masked]
Ottawa, Ontario
K1A 0E9

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