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|Title:||First in-situ measurements of HF radar echoing targets|
Bekkeng, T. A.
Jacobsen, K. S.
|Publisher:||American Geophysical Union|
|Citation:||Geophysical Research Letters, 2012, 39, L07104|
|Abstract:||The sounding rocket Investigation of Cusp Irregularities 2 (ICI-2) was launched into the cusp ionosphere over Svalbard to investigate the production of decameter scale irregularities in the electron plasma associated with HF radar backscatter. The main mission objective was to obtain high-resolution measurements of decameter scale electron plasma irregularities and to quantify the growth rate for the gradient drift instability (GDI). At the 5.7 kHz sampling rate of the absolute density measurements, ICI-2 has provided the first documentation in terms of absolute electron density measurements of how 10-m structures are located on km scale electron density gradients. ICI-2 traversed a cusp electron density structure created by ongoing soft precipitation. 10-m scale irregularities were generated at km scale density gradients. The estimated growth time for the GDI process was 10–50 seconds.|
|Rights:||© 2012 American Geophysical Union. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website. An edited version of this paper was published by AGU.|
|Appears in Collections:||Published Articles, Dept. of Physics and Astronomy|
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