| Description: The fast_hk_item_name_4 element provides the name of the housekeeping item which was collected and stored in the fourth plane of band suffix array (backplanes). If fast housekeeping is not used, this item will have a value of 'not used'. Fast housekeeping is a partial gathering of the available engineering data values, or items, that pertain to and describe the condition of the instrument itself. If present, the fast housekeeping value will always supercede the slow housekeeping value. |