Processing and Analysis Tools

The radiometric calibration of the data will be performed using the pre-flight laboratory calibration data and calibration updates using observations of an ensemble of stable stars as used for SOHO/LASCO and STEREO/SECCHI. The calibration team monitors the detector telemetry and the images and provides periodic updates to the science calibration routines. IDL procedures will be provided in the Solarsoft library to convert the Level-1 FITS image files into higher-level calibrated data products. These procedures will permit the user to perform standard corrections such as removal of geometric distortion, vignetting and stray light, and photometric calibration, on-the-fly for the data of interest. All calibration data necessary for these corrections will be included as part of the Solarsoft distribution which is publicly available at This approach has been used successfully for both LASCO and SECCHI, and ensures that the user has access to the most up-to-date calibrations while avoiding repeated processing and redistribution of large amounts of data.        

Software tools for common analysis tasks that are in use for LASCO, SECCHI, and SoloHI will be extended to incorporate WISPR data. These include image visualization, generation of movies, feature tracking, structure measurement, and combining datasets from multiple remote-sensing and in-situ instruments and spacecraft. Forward fitting of threedimensional models to heliospheric features such as streamers and CMEs will also be provided in Solarsoft. NRL will work with the Community Coordinated Modeling Center (CCMC) at NASA Goddard Space Flight Center to produce appropriate heliospheric model calculations for comparison with the WISPR data for each Carrington rotation, as well as for selected events of interest. The results of these model calculations will be made publicly available on the WWW.

WISPR Pub Number 1