Now showing items 21-30 of 31
Thermal tides and studies to tune the mechanistic tidal model using UARS observations
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1997-10)
Monthly simulations of the thermal diurnal and semidiurnal tides are compared to High-Resolution Doppler Imager (HRDI) and Wind Imaging Interferometer (WINDII) wind and temperature measurements on the Upper-Atmosphere ...
Poker Flat MST radar observations of high latitude neutral winds at the mesopause during and after solar proton events
(Elsevier, 1993-07)
Observations with the Poker Flat, Alaska, MST radar during and after solar proton events in 1982 and 1984 suggest that winds in the altitude range of ~ 80-90 km were altered as a consequence of the influx of energetic ...
Comparisons between Canadian prairie MF radars, FPI (green and OH lines) and UARS HRDI systems
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1997-10)
Detailed comparisons have been completed between the MF radars (MFR) in the Canadian prairies and three other systems: two ground-based Fabry-Perot interferometers (FPI) and the UARS high resolution Doppler imager (HRDI) ...
Intercalibration of HRDI and WINDII wind measurements
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1997-10)
The High Resolution Doppler Imager (HRDI) and the Wind Imaging Interferometer (WINDII) instruments, which are both on the Upper Atmosphere Research Satellite, measure winds by sensing the Doppler shift in atmospheric ...
Effects of lateral velocity heterogeneity under the Nevada Test Site on short-period P wave amplitudes and travel times
(Birkhäuser-Verlag; Springer Science+Business Media, 1990-03)
Short-period teleseismic P waves from the Nevada Test Site (NTS) show systematic variations in amplitudes and travel times, with low amplitudes corresponding to fast travel times, suggesting elastic focussing-defocussing ...
Electron temperatures during rapid subauroral ion drift events
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1998-04)
Examples of data from DE-2 satellite instruments are presented. These illustrate the behaviour of plasma parameters in the F-region and adjacent topside ionosphere during rapid sub-auroral ion drift (SAID) events. In ...
Edge wave and non-trapped modes of the 25 april 1992 Cape Mendocino tsunami
(Birkhäuser-Verlag; Birkhäuser Verlag ; Springer Science+Business Media, 1995-09)
The 25 April 1992 Cape Mendocino earthquake generated a tsunami characterized by both coastal trapped edge wave and non-trapped tsunami modes that propagated north and south along the U.S. West Coast. Both observed and ...
Ionospheric storm effects in the nighttime E region caused by neutralized ring current particles
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1997-03)
During magnetic storms an anomalous increase in the ionization density of the nighttime E region is observed at low and middle latitudes. It has been suggested that this effect is caused by the precipitation of neutralized ...
Simultaneous optical observations of long-period gravity waves during AIDA '89
(Elsevier, 1993-03)
Ground-based optical instrumentation supported the AIDA '89 wind measurement comparisons by describing the gravity waves affecting the 80-100 km altitude region during clear dark hours over Puerto Rico. This study tabulates ...
Observations of neutral winds in the polar cap during northward IMF
(Elsevier, 1994-02)
Long term remote observations of neutral winds at F-region altitudes have been performed at Thule Air Base (lat. 76.5[deg]N, long. 69.0[deg]W), Greenland, and Sondre Stromfjord (lat. 67.0[deg]N, long. 50.9[deg]W), Greenland. ...