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VIEWGRAPH LIST
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OBSERVATIONAL CHARACTERISTICS
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.html
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HESSI –UNIQUE SOFTWARE ISSUES
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.doc
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IMPLEMENTATION BASICS
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.doc
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OTHER HESSI-RELATED SOFTWARE
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.doc
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UNDEVELOPED SOFTWARE
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.doc
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SOFTWARE STATUS OVERVIEW
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.doc
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TEAM
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.doc
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ELEMENTS OF SOFTWARE
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.doc
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HESSI-UNIQUE SOFTWARE ISSUES
 | Indirect imaging |
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Techniques, strengths and weaknesses are unfamiliar to some users.
| Photon-based imaging and spectroscopy |
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Provides unprecedented range of analysis options.
| User tradeoffs among time-, energy-resolution, image quality, etc. |
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Level-0 database as starting point.
| HESSI instrumentation is sensitive only to high energy aspects of flares. |
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Importance of ancillary data
HESSI SOFTWARE – IMPLEMENTATION BASICS
| Multiplatform support – Unix (Solaris, Linux), Windows 95,98,NT |
| Solar SoftWare Tree |
+ convenient updating
- dynamic software environment
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can use either latest release OR development version
| IDL 5.31 or higher |
| Object-oriented code |
+ simplifies maintenance and upgrading
+ saves time in some analysis scenarios
- initially more complex to code
- less familiar, but more consistent user interface
| User interface options |
- Object-oriented commands
- Conventional IDL command line
- Command line scripts
- Graphical User Interface
OTHER HESSI-RELATED SOFTWARE
| ETH – enhanced database access, including web interface |
| GSFC (Holman et al) – x-ray, microwave modeling |
| GSFC (Ramaty, Murphy et al) – nuclear modeling package |
| UNH (McConnell) – polarimetry (?) |
| UCB (Holland) – support for Crab roll calibration |
UNDEVELOPED HESSI SOFTWARE
| Level-3 software (eg conversion of photon spectra to electron spectra) |
| Study-specific software |
| Support for non-solar observations |
| White-light imaging with SAS |
| Helioseismology with SAS limb data |
| Modifications to support full-sun imaging |
OVERVIEW OF SOFTWARE STATUS
| Still under development. |
| Strong object-oriented infrastructure is in place. |
| Most, but not all, of the basic analysis software is in place. |
| Some important features and capabilities remain to be implemented. |
| Many bugs (some obvious, some more subtle) remain. |
| Dynamic development environment. |
| Testing to date has been mainly functional and performance-oriented. |
| Quantitative and comparative testing has begun, but is at an early stage. |
| Documentation is being developed in parallel with software. |
SOFTWARE DEVELOPMENT TEAM
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Markus Aschwanden
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Forward Fitting algorithm
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Bob Bentley
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Documentation
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Andrew Conway
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MEMVIS algorithm
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Andre Csillaghy
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Objects, integration
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Brian Dennis
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Documentation
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Martin Fivian
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Aspect
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Gordon Hurford
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Imaging, grid response, PMT-RAS
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Chris Johns-Krull
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Documentation, testing
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Sam Krucke
r
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CLEAN algorithm
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Tom Metcalf
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PIXON algorithm
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Jim McTiernan
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Level 0 data base and catalog generation, simulations
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Jun Sato
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MEM-Sato algorithm
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Ed Schmahl
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Imaging
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Richard Schwartz
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Integration, back-projection, spectroscopy
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David Smith
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Spectroscopy
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Kim Tolbert
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Graphical interface
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Dominic Zarro
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Ancillary data
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ELEMENTS OF SOFTWARE FROM USER PERSPECTIVE
| Loading and updating software package |
| Access to level-0 database |
| Command line and object interface |
| Graphical user interface |
| Catalog data |
| Light curves |
| Spectroscopy |
| Imaging |
| Imaging spectroscopy |
| Ancillary data |
| Simulations |
| Access to data at ETH |
| Documentation |
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