Grid Point #: 001690 
Longitude:  -100.3036
Latitude:     18.4190
Contributing Station, distance (km).
TOL2  119.5
MRCU  128.3
YAIG  139.3
MXAT  158.7
TNMO  167.7
TNIF  168.8
TNCN  176.5
LZCR  205.1
TNAT  241.0