Space Radiation Climatology Workshop Summary 2009

http://www.virbo.org/GEM_NGRSC_2009

NGRSC Sessions• Next Generation Radiation Specifications Consortium• LANL, Aerospace, ONERA, AE9/AP9, and UCLA updates

– Lots of specification modeling going on – First versions of AE9/AP9 will become available in 2010

• Tools updates– VERB and RBE codes available on-line– IRBEM-LIB is becoming a widely used tool

• Discussion of Options for Open Source– Not ready to jump in whole hog, but could benefit from “closed” source

site for collaborative sharing/updating of codes– Suggested NASA and NSF to “encourage distribution of tools and codes

via open or closed source version control repositories”– ViRBO has offered to provide “Subversion” service in both open and

closed-source forms for community– Do NASA or NSF already have such services, are they planning to?

Space Radiation Climatology Sessions

• It’s really quiet, and the radiation belt is doing interesting things – e.g., the slot is widening• LANL and UCLA are working together to get their reanalyses to match• Reanalysis using CRRES, Akebono, GPS, and LANL GEO is available on UCLA web site and

will be a useful resource in understanding radiation belt dynamics• O’Brien showed how principle component analysis and eigenvalue analysis may be used when

more data assimilation products become available• Demonstration of determining Kp-dependent pitch-angle diffusion coefficient from long-term

reanalysis• For T96-T01S, differences in L* don’t have a huge impact on reanalysis solutions when data is

assimilated from multiple satellites.• UCLA has shown a nice new way to fill in gaps in solar wind parameters, which helps get more

data out of CRRES intervals and other missions w/ limited SW coverage• Weigel was able to tease out a statistically robust role for solar wind density in driving the ring

current• Denton showed a long-term mass density reconstruction from GOES wave data—extends Young

et al. models of O+/H+ ratios• THEMS/SST data has enormous potential, but still needs work to perform in intense radiation

environment. LANL and UCLA are working on inter-calibrating SST with other satellites • ViRBO is evolving to a long-term service, so we can all start to “rely” on it more