Grid Point #: 001860 
Longitude:  -100.3297
Latitude:     18.8507
Contributing Station, distance (km).
TOL2   87.3
MXAT  114.7
MRCU  119.2
TNMO  129.5
YAIG  132.9
TNCN  176.0
TNIF  177.2
LZCR  219.8
TNAT  254.3