Grid Point #: 001691 
Longitude:  -100.0759
Latitude:     18.4190
Contributing Station, distance (km).
MRCU  107.1
TOL2  107.3
YAIG  117.2
TNMO  182.6
TNIF  192.8
TNCN  200.4
TNAT  217.2
LZCR  228.4
TNNP  402.9