IVM data reduction package RIVM Version 3.4


	BACKGROUND

Version 3.3 improved batch processing and accommodated changes
in formats and in header content. Version 3.4 addresses the
processing from Stokes arrays to magnetic field maps, beginning
with a new quick-look magnetogram procedure. Minor upgrades and
bug fixes are incorporated as well.


	CODE MODIFICATIONS

bindown.pro
	New routine which spatially rebins a Stokes file. Used for
	quick-look reduction of 512^2 datasets, just to speed it up.

rivm_v3.4.pro
	Added QUICKLOOK keyword. Causes skipping of scat, parasitic,
	warp, deblur and seeing; calls bindown and uses ivm_wavgram
	for magnetic field analysis.

ivm_wavgram.pro
	New routine using wavelets to find line position and polarization
	amplitudes; an integral method for quick-look magnetograms.

wavelet.pro
	Borrowed routine; includes function to compute Paul wavelets.

gif_gram_3.4.pro
	Try to put the real year into the filename. New files have
	a field DATE_OBS        STRING    '2000-01-06T17:58:09.588Z'
	which can be parsed with, e.g.,anytim2cal. Try this as a first
	option, then fall back in case we're dealing with an older file.

ot_header_3.4.pro
	Updated structure to handle new entries in the raw data OBLK
	header.

ivm_fits2oblk.pro
	Converts FITS header into OBLK structure.

ivm_tag_trans.pro
	Translation table between FITS keywords and OBLK structure tagnames.

ivm_ghost_3.4.pro
	Add time variation.

ivm_mask_3.4.pro
	Add time variation.

ivm_para_scat_3.4.pro
	Add time variation.

ivm_parasitic_3.4.pro
	Update call to IVM_GHOST.

ivm_scatter_3.4.pro
	Add /SAVE keyword to reuse previous result, plus
	minor fixes to make result more accurate, slightly
	faster.

descatter_3.4.pro
	Modified calls to IVM_SCATTER to use /SAVE keyword.

ivm_spect_flat_3.4.pro
	Set quadratic variation of wavelength over field to the
	design value of the Fabry-Perot.  Rewrite logic to generate
	and apply solar spectrum correctly.

ivm_spur_mod_3.4.pro
	Major upgrade, now corrects for spatial variation of
	spurious modulation and spectral variation in Geometry
	images.

calmat_3.4.pro
	Calls ivm_calseqfix.pro to get a correction matrix that
	compensates for calseq input not being pure Stokes states.

ivm_calseqfix.pro
	Maintains a table of correction matrices for various epochs
	where the calseq input Stokes vectors are known to be incorrect.
	Called by calmat_3.4.

ivm_calcal_3.4.pro
	Reads oblk from ICAR file, passes it to calmat--instead of
	needing nn arg.

parfl2_3.4.pro
	Match call to IVM_SPECT_FLAT to drop obsolete keyword.


	COMPLETION

Version 3.4 was closed out October 2000.