Angular Distributions and Energy Spectra of Energetic Particles Observed by Voyager 1 at 85-88 AU

摘要

We describe energetic ion data obtained during 2002-03 by the Low Energy Charged Particle (LECP) instrument on Voyager 1 (V1).Our focus is the period approx 2002.5-2003.2,during which V1 moved from 85 to 88 AU,while at 34N~° latitude.Starting in mid-2002,particle intensities at V1 showed a large rapid increase that remained at highly elevated levels until early 2003.The unique nature of the V1 data and absence of comparable structures in the Voyager 2 data [2,3] suggests that the V1 event is associated with the heliospheric termination shock (TS).