Grid Point #: 001859 
Longitude:  -100.5580
Latitude:     18.8507
Contributing Station, distance (km).
TOL2  108.0
TNMO  113.2
MXAT  126.7
MRCU  143.2
TNCN  152.4
TNIF  155.0
YAIG  156.9
LZCR  198.7
TNAT  277.2