Accession Number:

ADA522342

Title:

Study of CME Propagation in the Inner Heliosphere: SOHO LAS, SMEI and STERO HI Observations of the January 2007 Events

Descriptive Note:

Journal article reprint

Corporate Author:

AIR FORCE RESEARCH LAB HANSCOM AFB MA SPACE VEHICLES DIRECTORATE

Report Date:

2009-01-01

Pagination or Media Count:

31.0

Abstract:

We are investigating the geometric and kinematic characteristics of interplanetary coronal mass ejections ICMEs using data obtained by the LASCO coronagraphs, the Solar Mass Ejection Imager SMEI, and the SECCHI imaging experiments on the STEREO spacecraft. The early evolution of CMEs can be tracked by the LASCO C2 and C3 and SECCHI COR1 and COR2 corona-graphs, and the HI and SMEI instruments can track their ICME counterparts through the inner heliosphere. The HI fields of view 4-90 deg overlap with the SMEI field of view 20 deg to all sky and, thus, both instrument sets can observe the same ICME. We present results for ICMEs observed on 24-29 Jan 2007 when the STEREO spacecraft were still near the Earth so that both the SMEI and STEREO views of large ICMEs in the inner heliosphere coincided. These results include measurements of the structural and kinematic evolution of two ICMEs and comparisons with drivedrag kinematic, 3D tomographic reconstruction, the HAFv2 kinematic, and ENLIL MHD models. We find that the four model runs generally were in agreement on both kinematic evolution and appearance of the events.

Subject Categories:

  • Astronomy
  • Astrophysics
  • Celestial Mechanics
  • Miscellaneous Detection and Detectors
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE