lat date leadtime obs
-0.000123456 20140101 0        0.000000123456
-0.000123456 20140101 1        0.00000123456
-0.000123456 20140101 2        0.0000123456
-0.000123456 20140101 3        0.000123456
-0.000123456 20140101 4        0.00123456
-0.000123456 20140101 5        -0.000000123456
-0.000123456 20140101 6        -0.00000123456
-0.000123456 20140101 7        -0.0000123456
-0.000123456 20140101 8        -0.000123456
-0.00000123456 20140101 9        -0.00123456
