Grid Point #: 001689 
Longitude:  -100.5313
Latitude:     18.4190
Contributing Station, distance (km).
TOL2  134.8
TNIF  144.9
MRCU  150.4
TNCN  152.5
TNMO  155.1
YAIG  162.0
MXAT  167.2
LZCR  182.0
TNAT  264.9