Energetic Particle Intensity Increases at Voyagers 1 and 2 during 2002-03

摘要

We summarize energetic particle data acquired during 2002-03 by the Low Energy Charged Particle (LECP) instruments on Voyagers 1 (V1) and 2 (V2).Our focus is the period approx 2002.5-2003.2,during which V1 and V2 saw markedly different intensity variations.During this period V1 moved from 85 to 88 AU,while at 34N~° latitude,and V2 moved from- 67 to 70 AU,while at 24S~° latitude.Starting in mid-2002,particle intensities at V1 showed a large rapid increase that remained at highly elevated but variable levels until early 2003.The unique nature of the V1 increase and the absence of comparable structures in the V2 data suggest that the V1 event is associated with the heliospheric termination shock (TS).