Grid Point #: 011631 
Longitude:   -76.9444
Latitude:     38.9235
Contributing Station, distance (km).
USNO   10.5
USN3   10.5
SA02   11.9
NRL1   13.4
DCDC   13.5
GODS   14.8
GODE   14.9
DEW4   37.4
MDHG   45.7