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Millstone RATE/Storm Experiment Nov 3 - 6, 1993

Comparison of Millstone Hill ISR elevation scans with radiotomography reconstructions of the perturbed mid-latitude ionosphere were made as a part of the Russian-American Tomography Experiment RATE Campaign. This work has been described by Foster et al [JIST].

DMSP Observations of Low-Latitude Topside Perturbation

DMSP F-10 overflew the perturbed ionosphere near the Millstone longitude and observed magnetically conjugate, topside density depletions coincident with ~1500 m/s horizontal and upward ion drift velocities. High-resolution density observations indicate that ionospheric irregularities with spatial wavelength < 40 km were uniformly enhanced in the region of the topside depletions. Power spectral density has been determined with 1024-pt FFT for the perturbed and adjacent background regions.

Drift meter & in situ ion density data observed by DMSP F-10 at 26 maglat and 850 km altitude.
Power spectral density of ion irregularities observed with 1/24-sec resolution.
Power spectral density of ion irregularities observed during March 21, 1990 DMSP encounter with mid-lat depletions.

Storm Perturbations (RATE EVENT) Nov 3 - 6, 19937

Formation of density depletion in low-laitude F region
Uplift of low-laitude F region
Uplift of low-laitude F region seen in the Japan sector
AE Index
Arecibo azscan density
Arecibo azscan velocity
X-ray Image 0250 UT
X-ray Image 0420 UT
X-ray Image 0556 UT

Millstone F Region Observations

zenith response to storm onset with VLF perturbation.
density
electron temperature
Nov 3 Ne
Nov 4 Ne

http://www.haystack.edu/~jcf/rate.htm -- Revised: Nov 20, 1997
E-mail: jcf@hyperion.haystack.edu