Source: stream/dyn_spect/Uleis/uleis_dyn_spect_stream__get_background.pro
uleis_dyn_spect_stream::get_background Return the background levels for a uleis dyn_spect stream (0.0). Usage: strref -> get_background([time]) Argument: time double Array of times (JD) at which the background is required. History: Original (after spect): 14/8/01; SJT