overlapping files report different values

The sgp5mwravgB5.c1 data file for this day was split into
two files (both partial days).  The first file contains
data for 990913.145500-990913.170000.  The second file
contains data for 990913.170000-990913.173000.  The two
files report different values the the 170000 time stamp.

• water_flag_periods
• base_time
• dlm_flag_fraction
• water_flag_fraction
• tbsky23
• lat
• vap
• tbsky31
• vap_sdev
• num_obs
• dlm_flag_periods
• alt
• ir_temp_sdev
• ir_temp
• 31tbsky
• 23tbsky
• num_obs_ir
• num_obs_irt
• lon
• tbsky23_sdev
• liq_sdev
• time_offset
• liq
• tbsky31_sdev