ECHOMOP is primarily orientated to processing single-frame observations. Facilities exist in the Starlink Software Collection for the combining of multiple spectra obtained from the reduction of a set of data frames. ECHOMOP does however provide assistance for situations where the data frames are well registered, removing the necessity for steps such as Order location, tracing, and profiling, to be performed for each frame. The 'clone' option allows the selective copying of sections of a previous reduction file, which then becomes the baseline for the reduction of another similar frame. Optionally the definition file itself can be altered to permit the extension of the reduction file structure to include multiple spectra from a single observed source (See 'Redefining Object paths' for an example of this).
Martin Clayton