Rights statement: ©2012. American Geophysical Union. All Rights Reserved.
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - A statistical comparison of solar wind propagation delays derived from multi-spacecraft techniques
AU - Case, Nathan
AU - Wild, James
N1 - ©2012. American Geophysical Union. All Rights Reserved.
PY - 2012/2/9
Y1 - 2012/2/9
N2 - We present a large-scale statistical study of the solar wind prop- agnation delay between NASA’s Advanced Composition Explorer spacecraft and ESA’s Cluster 1 spacecraft. This study focuses on those periods when Cluster was within the unimpeded solar wind, upstream of the bow shock nose, between 2001 and 2010. Using a cross-correlation method to compare the ACE and Cluster data, nearly 5000 propagation delays have been calculated and compared to both corresponding propagation delays in the OMNIweb dataset and to those computed by a simple “flat” (i.e. distance/speed) propagation model. The results show that statistically there is little difference between the OMNI and flat propagation delay times and that the cross-correlation method agrees well with both, but there are times when the various methods give significantly different propagation estimates. There is found to be no influence on the relationship between the estimated and observed solar wind propagation delays from the solar wind speed or IMF orientation.
AB - We present a large-scale statistical study of the solar wind prop- agnation delay between NASA’s Advanced Composition Explorer spacecraft and ESA’s Cluster 1 spacecraft. This study focuses on those periods when Cluster was within the unimpeded solar wind, upstream of the bow shock nose, between 2001 and 2010. Using a cross-correlation method to compare the ACE and Cluster data, nearly 5000 propagation delays have been calculated and compared to both corresponding propagation delays in the OMNIweb dataset and to those computed by a simple “flat” (i.e. distance/speed) propagation model. The results show that statistically there is little difference between the OMNI and flat propagation delay times and that the cross-correlation method agrees well with both, but there are times when the various methods give significantly different propagation estimates. There is found to be no influence on the relationship between the estimated and observed solar wind propagation delays from the solar wind speed or IMF orientation.
U2 - 10.1029/2011JA016946
DO - 10.1029/2011JA016946
M3 - Journal article
VL - 117
JO - Journal of Geophysical Research
JF - Journal of Geophysical Research
SN - 0148-0227
IS - A2
M1 - A02101
ER -