The open archive for STFC research publications

Full Record Details

Persistent URL http://purl.org/net/epubs/work/10916354
Record Status Checked
Record Id 10916354
Title Solar Mass Ejection Imager (SMEI) 3-D reconstruction of density enhancements behind interplanetary shocks: In-situ comparison near Earth and at STEREO
Abstract SMEI and IPS remotely observe increased brightness and velocity enhancements behind interplanetary shocks that are also seen in situ. We use the UCSD time-dependent 3-D reconstruction technique to map these enhancements, and compare them with measurements at the SOHO, Wind, ACE, and STEREO spacecraft. The analyses of these shocks from hour-averaged in-situ data show that the enhanced density column associated with the shock response varies considerably between different instruments, even for in-situ instruments located at L$_1$ near Earth. The relatively-low-resolution SMEI 3-D reconstructions generally show density enhancements, and within errors, the column excesses match those observed in situ. In these SMEI 3-D reconstructions from remotely-sensed data, the shock density enhancements appear not as continuous broad fronts, but as segmented structures. This may provide part of the explanation for the observed discrepancies between the various in-situ measurements at Earth and STEREO, but not between individual instruments near L$_1$.
Organisation STFC , RALSP , RALSP - SPD
Keywords Three-dimensional heliospheric density and velocity reconstructions , Solar wind , Interplanetary shocks
Funding Information
Related Research Object(s):
Licence Information:
Language English (EN)
Type Details URI(s) Local file(s) Year
Journal Article J Atmos Sol Terr Phys 73 (2011): 1317-1329. doi:10.1016/j.jastp.2010.11.023 2011