Grid Point #: 002705 
Longitude:  -103.5378
Latitude:     21.6566
Contributing Station, distance (km).
IIEG  108.5
UGEO  108.8
JAGU  109.1
ANIG  121.9
INEG  131.4
TNAM  132.4
IZAC  156.9
IDGO  289.6