Moving in dobs files

    function ALPHAdobs_create(fname, fhdr; cmt= "ALPHA dobs")

Creates a new ALHA dobs file. As ASCII header uses the contents of the file/IOBuffer fhdr.

    function ALPHAdobs_append(fname)

Open for read/write a previously existing ALPHA dobs file.

    function ALPHAdobs_next_p(fb, ic=1)

Position the fb record on the next parameter record. Returns true if success, false if not. If ic is passed, skip ic-1 parameter records

    function ALPHAdobs_next_dobs(fb, ic=1)

Position the fb record on the next dobs record. Returns true if success, false if not.

    function ALPHAdobs_prev_p(fb, ic=1)

Position the fb record on the prev parameter record. Returns true if success, false if not.

    function ALPHAdobs_prev_dobs(fb, ic=1)

Position the fb record on the prev dobs record. Returns true if success, false if not.