Soundings in directory JUN1997C of type *.i??
 no.    File        Date    start    End (UT)
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Soundings in directory JUN1997D of type *.i??
 no.    File        Date    start    End (UT)
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Soundings in directory JUL1997A of type *.i??
 no.    File        Date    start    End (UT)
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Soundings in directory AUG1997A of type *.i??
 no.    File        Date    start    End (UT)
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