Page Comparison

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1. Calculate the coords of the antennas in X,Y,Z relative to the array centre's X,Y,Z: this is just a vector difference:

   ant_geo_X = ant_X - arr_X
   ant_geo_Y = ant_Y - arr_Y
   ant_geo_Z = ant_Z - arr_Z
   
   

2. Rotate the longitude:

   x_local = x_geo*math.cos(lon_rad) + math.sin(lon_rad)*y_geo
   y_local = y_geo*math.cos(lon_rad) - math.sin(lon_rad)*x_geo
   z_local = z_geo

3. Rotate the latitude:

   e_local = y_local
   n_local = z_local*math.cos(lat_rad) - math.sin(lat_rad)*x_local
   u_local = x_local*math.cos(lat_rad) + math.sin(lat_rad)*z_local