SolarSoft

SolarSoft
Name	SolarSoft
Title	SolarSoft
Developer	NASA/various solar physics institutions
Released	1990s
Programming language	IDL, Python
Operating system	Unix-like, Windows
Genre	Solar data analysis, scientific software

SolarSoft

SolarSoft is a software distribution and library suite for solar physics data analysis and instrument calibration. It provides a coordinated collection of routines, packages, and data-access tools used by researchers working with spacecraft and ground-based observatories. SolarSoft integrates analysis code, instrument metadata, and event catalogs to support studies using data from missions and facilities across the heliophysics community.

Overview

SolarSoft functions as an archive and framework combining data access, visualization, and algorithmic routines for spacecraft such as Solar and Heliospheric Observatory, Solar Dynamics Observatory, Hinode (satellite), Parker Solar Probe, STEREO (spacecraft), and missions like Ulysses (spacecraft). The distribution bundles modules for imaging, spectroscopy, time-series analysis, and coordinate transforms developed by teams at institutions including Lockheed Martin Solar and Astrophysics Laboratory, Goddard Space Flight Center, National Solar Observatory, and High Altitude Observatory. SolarSoft supports scripting in Interactive Data Language and interfaces to libraries maintained by groups such as SAO and NASA Ames Research Center.

History

SolarSoft originated in the 1990s as a community effort to unify analysis tools for solar instruments on missions like Yohkoh (satellite) and SOHO. Early development involved collaborations among research centers including University of Colorado Boulder, Stanford University, and University of California, Berkeley. Over successive mission cycles—through campaigns with TRACE (spacecraft), Hinode (satellite), and SDO—the repository grew to encompass calibration pipelines, event lists, and mission-specific wrappers. Major milestones include the addition of data-handling for heliospheric missions such as ACE (spacecraft), incorporation of stereoscopic tools following STEREO (spacecraft), and support for in-situ measurements from Parker Solar Probe.

Architecture and Components

The SolarSoft distribution is organized into a layered architecture of core utilities, mission packages, and community-contributed modules. Core components include IO routines for FITS and telemetry used by teams at Space Science Laboratory, UC Berkeley, coordinate and time utilities adopted from SOHO toolkits, and visualization widgets originally influenced by work at Lockheed Martin. Mission packages wrap instrument-specific calibration code for payloads such as AIA (instrument), HMI (instrument), EIS (instrument), and XRT (instrument). Community modules cover algorithms from groups at Max Planck Institute for Solar System Research, Istituto Nazionale di Astrofisica, and Kyoto University. The distribution supports plug-in CI workflows and version control practices aligned with repositories hosted at research centers like GitHub mirrors used by university teams.

Data Sources and Supported Instruments

SolarSoft provides interfaces to data archives operated by NASA, ESA, JAXA, and national observatories. Supported instruments include imaging and spectroscopic payloads such as AIA (instrument), HMI (instrument), EIS (instrument), XRT (instrument), LASCO, and coronagraphs from SOHO. It also handles in-situ datasets from ACE (spacecraft), WIND (spacecraft), and Parker Solar Probe, as well as ground-based telemetry from facilities like Big Bear Solar Observatory and National Solar Observatory. Tools in the distribution enable reading FITS headers, handling telemetry packets produced by teams at Goddard Space Flight Center, and querying catalogs produced by observatory projects such as HEK and mission operations centers at Stanford University.

Usage and Applications

Researchers use SolarSoft for image processing, spectral fitting, differential emission measure inversion, and event detection applied to phenomena studied by SOHO, SDO, Hinode (satellite), and STEREO (spacecraft). Workflows built on the suite support investigations into solar flares cataloged with reference to GOES observations, coronal mass ejections tracked by LASCO, and magnetic field analysis leveraging data from HMI (instrument) and ground arrays maintained by NSO. SolarSoft routines underpin published analyses in journals connected with institutions such as Harvard–Smithsonian Center for Astrophysics and Max Planck Institute for Solar System Research, and are used in operational forecasting collaborations involving NOAA and mission teams at NASA Goddard.

Development and Community

SolarSoft is maintained by a distributed community of instrument teams, research groups, and data centers. Contributors hail from institutions including Lockheed Martin Solar and Astrophysics Laboratory, Goddard Space Flight Center, National Solar Observatory, University of St Andrews, and international partners at Kyoto University and Istituto Nazionale di Astrofisica. Development practices combine mailing lists, code reviews, and community workshops coordinated at meetings such as AGU Fall Meeting and Solar Physics Division Meeting. Training materials, tutorials, and example pipelines are produced by teams at Stanford University and UC Berkeley to onboard students and mission scientists.

Licensing and Distribution

SolarSoft packages are distributed under a mix of licensing terms reflecting contributions from government laboratories, universities, and international agencies. Core libraries from NASA centers often follow open-science distribution norms preferred by agencies such as ESA and JAXA, while some instrument-specific components include license statements from institutions like Lockheed Martin or university groups. Distribution mechanisms historically relied on CVS and later SVN mirrors hosted at research institutions; modern access methods include package repositories and mirrors used by groups on platforms such as GitHub and institutional servers at Goddard Space Flight Center.

Category:Solar physics software