FUNCTION: get_mcfg(t) INPUT: t: double, seconds since 1970. KEYWORDS: advance: advance to the next data point index: select data by sample index instead of by time. times: if non-zero, return an array of data times corresponding to data samples. PURPOSE: returns a SST Instrument Configuration data record. CREATED BY: Peter Schroeder LAST MODIFIED: @(#)get_mcfg.pro 1.1 99/04/19 NOTES: The procedure "load_3dp_data" must be called first.