1 / 8

IRBEM LIB Update

IRBEM LIB Update. Paul O’Brien. What is IRBEM?. IRBEM-LIB is open source, shared development Started as ONERA-DESP LIB as a convenient tool for computing L* Includes many magnetic field models Includes routines for field line and drift shell tracing Coordinate transforms

urbano
Download Presentation

IRBEM LIB Update

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. IRBEM LIB Update Paul O’Brien

  2. What is IRBEM? • IRBEM-LIB is open source, shared development • Started as ONERA-DESP LIB as a convenient tool for computing L* • Includes many magnetic field models • Includes routines for field line and drift shell tracing • Coordinate transforms • Radiation specification models • Neutral atmosphere • Orbit propagator • Accessible from IDL, Matlab, and Excel via DLL • Mainly Fortran, some “extras” in C • As of release 4.3, the library is now known as IRBEM LIB • IRBEM = International Radiation Belt Model • Sponsored by COSPAR/PRBEM • File names haven’t changed (reverse compatibility)

  3. Rename and Move to Sourceforge • IRBEM LIB is hosted on sourceforge at irbem.sourceforge.net • Allows multiple developers to stay “synched up” in the working directory /trunk/ (Bourdarie, O’Brien, Guild, Friedel, Roth, Boscher, …) • Keeps track of all changes with subversion version control tool (and also CVS, I think) • Formal releases are in /tags/, but it’s OK to use the working copy—it “works” it’s just being improved all the time. • Fora (forums?) for questions and discussion, problem tracking, feature requests, etc. • Covered by Lesser Gnu Public License

  4. Multi-Platform • Successfully compiled on Win32, Linux64, and Solaris64 • IDL & Matlab wrappers work on Win32 and Linux64 – use the “working” copy in /trunk/ • Mac OS-X not 100% - can use from Fortran but DLL does not appear to work with IDL, don’t know about Matlab. Need Mac Expert!

  5. New Enviornment Models • Neutral Atmosphere: • MSIS86, MSISE90, NRLMSIS00 • Radiation Belts: • AE8/AP8 • CRRES-ELE, CRRES-PRO • IGE (POLE) • MEO-GNSS (GPS and GALILEO)

  6. New Field Tracing Routines • MAKE_LSTAR routines support request for Phi rather than L* • Fast L* (LANDI2LSTAR, LANDI2LSTAR_SHELL_SPLITTING EMPRICALLSTAR) • Only for Olson-Pfitzer Quiet • New more “careful” drift shell (DRIFT_BOUNCE_ORBIT) • New tracing to foot point: • FIND_FOOT_POINT, TRACE_FIELD_LINE_TOWARD_EARTH • Identify Hemisphere (GET_HEMI) • Convert L* to Phi LSTAR_PHI

  7. Extras • We have created the /extras folder to hold tools that aren’t part of the onera_desp_lib DLL • If you have an IRBEM-related tool you’d like to make available, consider putting it in the extras folder • A neural network library • C with GSL, • trains, evaluates neural networks • An inversion library • C with GSL • spectral inversion • converting omnidirectional fluxes to unidirectional fluxes using statistical models • Var2cdf • IDL and Matlab code • Share variables and save sets between Matlab and IDL via CDF • Works most of the time ;)

  8. Future Plans • More work on Fast L* • Minor tweaks to LANDI2LSTAR_SHELL_SPLITTING • Neural network fast L*? • Faster IGRF (Pfitzer’s INVARM) • More models from ONERA • IRI and Shieldose2 could be added fairly easily • What do you want/need? • We could really use a motivated person to update and maintain our sourceforge web pages

More Related