LEO radiation environment: impacts on PROBA Erwin De Donder BIRA-IASB Space Weather Section Brussels, 2014 March 31 STCE Workshop: PROBA science operations 1
Introduction BIRA-IASB Space Weather Section: Host and developer of Space Environment Information System (SPENVIS) since 1996 (www.spenvis.oma.be, www.spenvis-ng.eu) ESA s operational software to simulate the space environment and effects Used for: Mission preparation e.g. PROBA-2, PROBA-V SEE rate and TID calculations (QinetiQ Space nv) Mission analysis e.g. PROBA-2/LYRA auroral perturbations Model comparisons with in-orbit data e.g. PROBA-1/SREM data (ESTEC) Participation in SSA program (SN-I, SSCC, portal, ) Brussels, 2014 March 31 STCE Workshop: PROBA science operations 2
Outline I. Space radiation environment at LEO PROBA-1/SREM data PROBA-V/EPT data see talk V. Pierrard et al. II. Space radiation effects at LEO PROBA-2/TDM data PROBA-2/LYRA auroral perturbations Brussels, 2014 March 31 STCE Workshop: PROBA science operations 3
I. Space radiation environment at LEO PROBA-1/SREM data (1): introduction Brussels, 2014 March 31 STCE Workshop: PROBA science operations 4
I. Space radiation environment at LEO PROBA-1/SREM data (2): SAA, horns, equator, GCR (D. Marinov et al., 2008) Brussels, 2014 March 31 STCE Workshop: PROBA science operations 5
Map in invariant coordinates (R,λ) of the radiation-belt omnidirectional integral fluxes for protons > 10 MeV and electrons > 1 MeV, respectively (model: AP8-AE8) horns SAA SPENVIS-4: AP8/AE8 Brussels, 2014 March 31 STCE Workshop: PROBA science operations 6
I. Space radiation environment at LEO PROBA-1/SREM data (3): solar proton events Flare No. 6120521 Flare No. 6121305 (D. Marinov et al., 2008) Brussels, 2014 March 31 STCE Workshop: PROBA science operations 7
I. Space radiation environment at LEO PROBA-1/SREM data (4): geomagnetic shielding during SPE (coinc. p+) (p+) (p+) (H.D.R. Evans et al., 2008) Brussels, 2014 March 31 STCE Workshop: PROBA science operations 8
I. Space radiation environment at LEO PROBA-1/SREM data (5): variation radiation belts outer belt outer belt (e-) (H.D.R. Evans et al., 2008) inner belt fast wind injection (p+) Brussels, 2014 March 31 STCE Workshop: PROBA science operations 9
I. Space radiation environment at LEO PROBA-1/SREM data (7): model comparisons (p+) (coinc. p+) (p+) (p+) (H.D.R. Evans et al., 2008) Brussels, 2014 March 31 STCE Workshop: PROBA science operations 10
I. Space radiation environment at LEO PROBA-1/SREM data (8): anisotropy (H.D.R. Evans et al., 2008) Brussels, 2014 March 31 STCE Workshop: PROBA science operations 11
Summary PROBA-1/SREM data are useful to study radiation environment as function of time and space study directionality of radiation environment at low altitude correlate data with on-board degradations caused by radiation Brussels, 2014 March 31 STCE Workshop: PROBA science operations 12
II. Space radiation effects at LEO Introduction (1): overview various effects http://www.aero.org/publications/crosslink/summer2003/02_table1.html Brussels, 2014 March 31 STCE Workshop: PROBA science operations 13
II. Space radiation effects at LEO Introduction (2): altitude effect SPENVIS-4: SHIELDOSE with AP-8 input. Brussels, 2014 March 31 STCE Workshop: PROBA science operations 14
II. Space radiation effects at LEO PROBA-2/TDM data (1): SEL experiment Technology Demonstrator Module study differences between in-flight data and predictions input for improvement modelling, predicting and testing Brussels, 2014 March 31 STCE Workshop: PROBA science operations 15
II. Space radiation effects at LEO PROBA-2/TDM data (2): SEU mapping (M. D Alessio, 2013) Brussels, 2014 March 31 STCE Workshop: PROBA science operations 16
II. Space radiation effects at LEO PROBA-2/TDM data (3): SEU rates Overall rates are dominated by protons and are within a factor 2 of the inflight rates (M. D Alessio, 2013) Brussels, 2014 March 31 STCE Workshop: PROBA science operations 17
II. Space radiation effects at LEO PROBA-2/LYRA data (1): auroral perturbations when cover open in EUV/X-ray channel (Al, Zr) in auroral zones (~ 70 lat) after geomagnetic storm (Kp 4) no correlation with SPE Which mechanism? Which particles? Brussels, 2014 March 31 STCE Workshop: PROBA science operations 18
II. Space radiation effects at LEO PROBA-2/LYRA data (2): localisation Perturbations trajectories 2011/05/1,2,29 Perturbations Centers in North pole 2011/05/01 J-P Iraguha (ULB student) Brussels, 2014 March 31 STCE Workshop: PROBA science operations 19
II. Space radiation effects at LEO PROBA-2/LYRA data (3): an approach Reconstructing particle environment (i.e. flux) by using e.g. MetOpA data (sso, @ ~ 800-850 km, LTAN = 21h30) finding similar (B,L) pairs for a = K p Propagation of flux through detector using GEANT4 software (available in SPENVIS) Comparing detector response with observations Brussels, 2014 March 31 STCE Workshop: PROBA science operations 20
Space radiation effects at LEO PROBA-2/LYRA data (4) METOP-A trajectories Perturbations trajectories PROBA-2 trajectories J-P Iraguha (ULB student) Brussels, 2014 March 31 STCE Workshop: PROBA science operations 21
General conclusion PROBA provides data on the radiation environment (fluxes, directionality, species, ) DIRECTLY through radiation measurements INDIRECTLY through radiation effect measurements that allows us to improve environment models and eventually create new models Brussels, 2014 March 31 STCE Workshop: PROBA science operations 22
Thank you for your attention. Brussels, 2014 March 31 STCE Workshop: PROBA science operations 23