E-Print Archive

There are 4102 abstracts currently viewable.


Advanced Search
Main Page Add New E-Print Submitter
News Help/FAQ About Preferences
Manage Key Phrase
The RHESSI Imaging Concept View all abstracts by submitter

Gordon J. Hurford   Submitted: 2002-09-19 14:24

The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) images solar hard X-ray and gamma-rays from 3 keV to 15 MeV with spatial resolution as high as 2.3 arcseconds. Instead of conventional optics, nine rotating modulation collimators are used to time-modulate the incident flux as the spacecraft rotates in a manner which depends on the location and morphology of the source. Starting from the arrival time of individual photons, ground-based software then uses the time-modulated signals to reconstruct the image of the source. The purpose of this paper is to convey both and intuitive feel and the mathematical basis for this imaging process along with its strengths and weaknesses. Following a review of the relevant hardware, the imaging principles and the basic back projection method are described, along with their relation to Fourier Transforms. Several specific algorithms (CLEAN, MEM. PIXONS and Forward Fitting) applicable to RHESSI imaging are briefly described.

Authors: G. J. Hurford, E. J. Schmahl, A. J. Conway, B. R. Dennis, R. A. Schwartz, R.P.Lin, J. McTiernan, D. M. Smith, C. Johns-Krull, A. Csillaghy, M. J. Aschwanden and T. R. Metcalf

Publication Status: Solar Physics (in press)
Last Modified: 2002-09-20 11:37
Go to main E-Print page  The PMTRAS Roll Aspect System on RHESSI  The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI)  Edit Entry  Download Preprint  Delete Entry 

Go to main E-Print pageGo to main E-Print page.
Previous AbstractPrevious Abstract.
Next AbstractNext Abstract.
Download PreprintDownload Preprint.
Submitter's HomepageSubmitters Homepage.
Edit EntryEdit Entry.
View All Abstracts By SubmitterView all abstracts by submitter.
Delete AbstractDelete abstract.

Latest Entries
Three-dimensional Density Structure of a Solar Coronal Streamer Observed by SOHO/LASCO and STEREO/COR2 in Quadrature
Modelling Mg II During Solar Flares, I: Partial Frequency Redistribution, Opacity, and Coronal Irradiation
The Birth of a Jet-driven Twin CME and Its Deflection from Remote Magnetic Fields
On the Origin of Solar Torsional Oscillations and Extended Solar Cycle
What Sets the Magnetic Field Strength and Cycle Period in Solar-type Stars?
Stereoscopic Observations of an Erupting Mini-filament Driven Two-Sided-Loop Jet and the Applications for Diagnosing Filament Magnetic field
Dynamic Processes of the Moreton Wave on 2014 March 29
Shock Heating Energy of Umbral Flashes Measured with Integral Field Unit Spectroscopy
Stealth Coronal Mass Ejections from Active Regions
Coronal Loop Scaling Laws for Various Forms of Parallel Heat Conduction
Structure of the transition region and the low corona from TRACE and SDO observations near the limb
Quantifying the relationship between Moreton-Ramsey waves and "EIT waves" using observations of 4 homologous wave events
Formation of quasi-periodic slow magnetoacoustic wave trains by the heating/cooling misbalance
Fundamental Transverse Vibrations of the Active Region Solar Corona
Damping of slow magnetoacoustic oscillations by the misbalance between heating and cooling processes in the solar corona
Magnetic helicity and eruptivity in active region 12673
Impulsive coronal heating from large-scale magnetic rearrangements: from IRIS to SDO/AIA
Probing the effect of cadence on the estimates of photospheric energy and helicity injections in eruptive active region NOAA AR 11158
The birth of a coronal mass ejection
Oscillations of the baseline of solar magnetic field and solar irradiance on a millennial timescale

Related Pages
MSU Solar Physics.
Max Millennium Science Mail Archive.
Max Millennium Message of the Day Mail Archive.
Max Millennium Flare Catalog

Archive Maintainer
Alisdair Davey

© 2003 Solar Physics Group - Montana State University