RHESSI Data Analysis Software Change History

Click on the date to see a more complete description of each change.

Note: Only the more significant changes are documented here.  Minor changes are ongoing.

 

7-May-2009 Object parameter tables updated to include parameters for visibility and vis-based image algorithm objects.
http://hesperia.gsfc.nasa.gov/ssw/hessi/doc/params/hsi_params_all.htm
4-May-2009 Improved visibility object software, visibility bags, image cubes from visibilities. Complete info at http://hesperia.gsfc.nasa.gov/ssw/hessi/doc/image/hsi_visibility_howto.html
cbe_digital_quality default changed to .95
3-May-2009 Change in notification of software modifications.
1-Feb-2009 Commonly used documentation now available offline.  Table of contents in $SSW/hessi/doc/index.html
6-Apr-2008 New post-anneal gain solution online
28-Mar-2008 Important: RHESSI gain calibration issue since anneal
16-Jan-2008 RHESSI detectors successfully annealed
19-Dec-2007 Release 9.0
5-Nov-2007 PLOTMAN plot options improved.  Users can now set their own preferences.
3-Oct-2007 Halfscale artifact filtering method implemented
13-Jul-2007 Support for harmonics and visibilities
10-May-2007 Release 8.9
12-Apr-2007 More about using old control parameter defaults and setting your own defaults.
12-Apr-2007_(a) Critical improvements to the datagap detection and livetime integration algorithms
26-Mar-2007 Change in RHESSI object control parameter default values
10-May-2006 Release8.8
24-Feb-2006 Release 8.7
20-Sep-2005 Release 8.6
6-Sep-2005 Changes in how the RHESSI software finds data files.
30-Aug-2005 Default RHESSI subcollimator response table has been updated.
2-Aug-2005 Improvements to pileup correction, offaxis response determination, and livetime calculation.
8-Jul-2005 Release 8.5.
22-Jun-2005 Improvement and bug fix for pileup correction.
10-Mar-2005 New image object that handles both multi-image cubes and single images.
 http://hesperia.gsfc.nasa.gov/ssw/hessi/doc/image/hsi_image_howto.html
http://hesperia.gsfc.nasa.gov/ssw/hessi/doc/gui/gui_changes_march2005.html
8-Mar-2005 Release 8.4.
23-Feb-2005 Fixed image blurring caused by culling bug.
16-Dec-2005 Release 8.3.
29-Nov-2004 Changes to Back Projection and Clean, new parameters for culling, rate-enabled back projection, local averaging and more.
7-Sep-2004 Fixed bug that caused incorrect source position in images in rare cases.
29-Jul-2004 Enabled writing multiple attenuator states in a single SRM FITS file.
16-Jul-2004 Release 8.2.
7-Jun-2004 Changed release/development version strategy.
19-Mar-2004 Release 8.1.
29-Sep-2003 Updated Roll database covering February 2002 through August 2003 online.
12-Sep-2003 Decimation, pileup, and flare position corrections implemented.
12-Aug-2003 Roll Aspect Data Base introduced.
14-Jul-2003 Livetime accumulation correction.
14-Jul-2003 (a) Detector 2 degraded.
1-Jul-2003 Improvements to SPEX and XRAY packages.
3-Mar-2003 More explanation about new daily observing summary files.
11-Feb-2003 Release 8 of HESSI Analysis Software online.
18-Nov-2002 Many changes to HESSI Analysis Software on ATEST (dropouts, deadtime, narrow spectrogram bins, SPEX export, error handling mechanism).
17-Nov-2002 Error handling mechanism (catch) added to HESSI software.
15-Nov-2002 SPEX thermal spectra now includes atomic line emission below 8 keV.
26-Oct-2002 Correction to image normalization at high energies - front/rear segment issues.
22-Oct-2002 Error in image and spectra normalization - assumed thin attenuator always in place.
1-Oct-2002 Spectral response matrix error for front segment of Detector 9.
19-Sep-2002 Daily observing summary files, daily instrument log files, and corrected count rate plots introduced.
29-Aug-2002 Fixes to dropouts, livetime. Detector gain a function of date.
24-Jul-2002 Interpolated roll solution for July 23 event.
16-Jul-2002 Imaging with Grids 1 and 2 fully supported.
11-Jul-2002 PMTRAS diagnostic plots.
8-Jul-2002 New multiple energy band parameter for imaging. Change in sum_flag, sum_coincidence parameters.
19-Jun-2002 Livetime corrections enabled for all classes (spectrum, lightcurve, and image).
22-May-2002 Preliminary subcollimator response table to enable imaging with Grids 1 and 2.
 

Last updated 11 May 2009 by Kim Tolbert , 301-286-3965