general query to DPAS; it gets a list of instruments and lists for start and stop times; for a query hessiEC, phoenix2; start times 2001-01-01 00:00:00, 2005-04-01 00:00:00; stop times 2001-01-05 00:00:00, 2005-05-1 00:00:00 it would perform to queries: hessiEC from 2001-01-01 00:00:00 to 2001-01-05 00:00:00 and phoenix2 from 2005-04-01 00:00:00 to 2005-05-1 00:00:00 There is only one output file with the results from both queries.