Exchange Normal equation terms between organizations

The exchange format was devised to enable the exchange of data between two different organizations with two different programs

There are 3 files that are defined for the exchange

1. Description of the normal equations
   • Header record

       Column  contents Definition
       1:5     integer  Number of unknowns
       6:10    integer  State of normal equations
     unreduced
     partially reduced
     fully reduced
     inverse
       11:20   integer  Cumulative observation count
       21:30   integer  Cumulative unknown count
       31:180  blank
       

     Note:The number of unknowns refers to the number in the file. The cumulative unknown count refers to the number of unknowns plus all the ones that have been eliminated.

   • Description of Normal equation unknowns

        Column  Contents  Definition
        1:2     integer   [1]Station coordinate unknowns
        3:4     integer   Subtype
     northing
     easting
     height
        5:6     integer   Group number (optional)
        7:36    char      Identifier
     Canadian station number prefixed by an asterisk
     13 character QIDQSN
       37:60    real      Latitude, decimal degrees
       61:84    real      Longitude, decimal degrees
       85:108   real      Geoid height, meters    
      109:132   real      Orthometric height, meters
      133:156   real      Astronomic latitude, decimal degrees  (Blank if undefined)
      157:180   real      Astronomic longitude, decimal degrees (Blank if undefined)
      
        Column  Contents  Definition
        1:2     integer    
     [2]Doppler positioning coordinate system unknowns
     [3]Doppler translocation coordinate system unknowns
     [4]VLBI coordinate system unknowns
     [5]GPS coordinate system unknowms
     [6]Satellite laser coordinate system unknowns
        3:4     integer    
     Rotation about X
     Rotation about Y
     Rotation about Z
     Translation in X
     Translation in Y
     Translation in Z
     Scale factor
        5:6     integer   Group Number required
        7:36    char      Optional identifier
       61:84    real      
     Rotations, seconds
     Translations, meters
     scale unitless
       85:180   Blank       
        
        Column  Contents  Definition
        1:2     integer   [7]Local obsevation class unknowns
        3:4     integer   
     Scale factor
     Azimuth
     Direction orientation
     Constant for terrestrial distances
     Orientation for inertial observations
     Scale for inertial observations
        5:6     integer   Optional group number
        7:36    char      Optimal identifier
       37:60    real      Appropriate for subtype
       61:180   blank
     
      

2. Normal equation elements

    Column  contents definition
    1:5     integer  Row number
    6:10    integer  Column Number
    11:34   integer  Normal equation element (Only non zero terms required)
    

   Note:this inclues the right hand side as n+1 column number and the partial VtPV in row n+1 for state 1 or 2.

3. Original Diagonal elements

    Column  contents definition
    1:24     real    Original diagonal element
    25:34    blank
    

   Note:This file contains n records corresponding to the n unknowns in the normal equations