	-- 'gains.span' + 'weighting.span' = scan | subscan

	-- 'aperture' for aperture conversion/scaling

	-- channel.dataIndex --> channel.getID()?

	-- private Scan.serialNo (use getID())
	
	-- faint.cfg's [extended] reenable some forgotten modalities.

	-- re-check accel-mag (before array) on instruments (sharc2/apex/gismo)

	-- Do not add pixels to instruments on initialization.
	   Add these only when reading scans!

	-- Scan horizontal coordinates only for GroundBased 
	   (getHorizontal(), setHorizontal(coords))
	   
	-- highpass filtering to hp signals too...
	   should do something about whitening also??

	-- Shadow scans
		* Scan.shadow, CRUSH.shadowSource?
		* call shadow operations on all signal estimation/removal.
		* console output on shadows?
		* write shadow scans
		* options:
			shadow
			shadow.sources	(default catalog 1Jy, point)

	-- Scan.parallelization
	   -- load management...
		size=frames*channels
		Navailable = Ncp * remainingSize / totalSize 	
		Npossible = remainingsize / size
		parallel = round|floor ? (Navailable / Npossible)

	-- Parallelization classes
	   crush.parallel
	   (use max threads by default, or limit by constructor)
		ParallelOp<Type> (common abstract class)
			threads, queue, execute()
		ParallelFrameOp	
			blocksize, process(Frame[] frames)
		ParallelChannelOp
			channels, process(Channel)
	   	ParallelChannelGroupOp		
			groups, process(ChannelGroup)
	
	-- Annuli, Polygon, and Point regions
	-- More debug (CRUSH.debug) 
		--> give traces for all exceptions
		--> Remove ? from NaN checks?
	-- Merge util with xcrush and update to it...
	-- Common TextFileParser (and TextTableParser?)...
	-- RMI (client/server) mode...
		-- InfoMessage, WarningMessage, ErrorMessage (with stubs)
		-- ScanSet (for fixed threads)
		-- Node/Job Manager
		-- node.readScan(), or node.addScan()
		-- Service discovery via UDP
		-- node.merge(SourceModel)
	-- parallelization
		-- drifts
		-- decorrelate
		-- gains
		-- weighting (all)
		-- despike
		-- filter
		-- reading/validation
	-- Orientable corrections (e.g. single scan rows...)
		-- Multimode analysis
		   (choose the highest mode with a certain power
		   fraction of the zero mode)
		-- mean rotation span from weighted center
	.. Documentation.
	.. tcsh does not like [], add note to README
	-- regrid flux (slightly high) noise (way too low).
	.. pointing support
	.. logging support
	.. Chopped reductions
		-- Photometric mode. Think this one through...
	.. Update 'extended' mode configuration
	.. Reorganize options keys (hierarchical)
	.. Optimize reductions...
	.. Documentation
		.. What's new (minicrush and crush versions)


