date         sta       cast      lat       lon       bots      depth       N2_1_no_prefilter  N2_2_no_prefilter  N2_average_no_prefilter  N2_stderr_no_prefilter  N2_3_10um_prefilter  N2_4_10um_prefilter  N2_average_10um_prefilter  N2_stderr_10um_prefilter  N2_gt_10um_fraction  activity_and_comments  
20080709     7         9         31.422    -140.4979  23-24     5           nd                 nd                 2.33                     nd                      nd                   nd                   nd                         nd                        nd                   nd                     
20080709     7         9         31.422    -140.4979  8-10      42          nd                 nd                 1.03                     0.02                    nd                   nd                   nd                         nd                        nd                   nd