1                    2              3      4      5     6    7      8      9           10 11  12  13  14     15  16      17      18      19      20    21     
===================  =============  =====  =====  ====  ===  =====  =====  ==========  =  ==  ==  ==  =====  ==  ======  ======  ======  ======  ====  ====== 
1975-12-29T00:00:15  2442775.50017  -99.9  -9.99  -999  -99  -99.9  -99.9      525832  3   3   0   0   99.0   5     3.0  -999.9  -999.9     1.0  9.99     0.1