Grid Point #: 001681 
Longitude:  -102.5807
Latitude:     18.4190
Contributing Station, distance (km).
TNCN   66.0
LZCR   68.2
TNIF   74.1
TNMR   82.0
COL2  149.5
COO4  157.1
NVDO  167.7
UCOE  180.8