P. B. Hays
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An empirical model of the Earth's horizontal wind fields: HWM07 Open
The new Horizontal Wind Model (HWM07) provides a statistical representation of the horizontal wind fields of the Earth's atmosphere from the ground to the exosphere (0–500 km). It represents over 50 years of satellite, rocket, and ground‐b…
A global view of the molecular oxygen night airglow Open
The High‐Resolution Doppler Imager on the Upper Atmosphere Research Satellite has observed the O 2 atmospheric band nightglow at extremely high spatial resolution of 50 km in the horizontal over much of Earth's surface. These observations …
High Resolution Doppler Imager observations of ozone in the mesosphere and lower thermosphere Open
Observations made by the High Resolution Doppler Imager (HRDI) onboard the Upper Atmosphere Research Satellite (UARS) of molecular oxygen Atmospheric band dayglow and temperature are used to infer ozone mixing ratios in the mesosphere and …
Tidal variability of the geomagnetic polar cap mesopause above Resolute Bay Open
Variability in the geomagnetic polar cap neutral wind near the mesopause above Resolute Bay, Canada (74.9°N, 94.9°W) has been observed by a Fabry‐Perot Interferometer, using a circle‐to‐line detection technique (FPI/CLIO) to observe the OH…
Remote sensing of mesospheric temperature and O<sub>2</sub>(<sup>1</sup>Σ) band volume emission rates with the high‐resolution Doppler imager Open
An algorithm for obtaining temperatures and volume emission rate profiles in the mesosphere and lower thermosphere from HRDI measurements is described. Temperature and volume emission rates are derived via perturbation theory by comparing …
Seasonal and local time variations in the O(1S) green line, O2 atmospheric band, and OH Meinel band emissions as measured by the High Resolution Doppler Imager Open
The High Resolution Doppler Imager (HRDI) instrument on the Upper Atmosphere Research Satellite (UARS) has been collecting nearly simultaneous altitude profiles of the O(1S), O2(1Σ), and OH (9-4) Meinel band emissions in the mesosphere and…
Intercalibration of HRDI and WINDII wind measurements Open
The High Resolution Doppler Imager (HRDI) and the Wind Imaging Interferometer (WINDII) in- struments, which are both on the Upper Atmosphere Research Satellite, measure winds by sensing the Doppler shift in atmospheric emission features. B…
Comment on “A model for meteoric magnesium in the ionosphere” by W. J. McNeil, S. T. Lai, and E. Murad Open
peer reviewed
Diurnal migrating tide as seen by the high‐resolution Doppler imager/UARS: 2. Monthly mean global zonal and vertical velocities, pressure, temperature, and inferred dissipation Open
Meridional diurnal tidal winds derived as described by Khattatov et al. [this issue] from the high‐resolution Doppler imager (HRDI) data are used in the linearized tidal equations to solve for the diurnal tidal oscillations in the zonal an…
Diurnal migrating tide as seen by the high‐resolution Doppler imager/UARS: 1. Monthly mean global meridional winds Open
The high‐resolution Doppler imager (HRDI) instrument on board the upper atmosphere research satellite measures global winds in the mesosphere and lower thermosphere on a day‐to‐day basis. The horizontal coverage of the HRDI data is excelle…
Intercalibration of HRDI and WINDII wind measurements Open
Abstract. The High Resolution Doppler Imager (HRDI) and the Wind Imaging Interferometer (WINDII) in- struments, which are both on the Upper Atmosphere Research Satellite, measure winds by sensing the Doppler shift in atmospheric emission f…
An estimation of the dynamical isolation of the tropical lower stratosphere using UARS wind and trace gas observations of the Quasi‐Biennial Oscillation Open
Upper Atmosphere Research Satellite tropical wind and constituent measurements are used to estimate an upper limit of mid‐latitude to tropical trace gas exchange by examining the phase of the N 2 O/CH 4 ratio with respect to the Quasi‐Bien…
Correction to “A comparison of solar tides derived from UARS high‐resolution Doppler imager wind measurements with simulations from the NCAR thermosphere‐ionosphere‐mesosphere electrodynamics general circulation model” by Dong L. Wu, Paul B. Hays, and Raymond G. Roble Open
In the paper "A comparison of solar tides derived from
Stellar alignment of the High Resolution Doppler Imager Open
Peer Reviewed
Long‐term variability in the solar diurnal tide observed by HRDI and simulated by the GSWM Open
Observations of the mesosphere and lower thermosphere winds obtained by the High Resolution Doppler Imager (HRDI) on the Upper Atmosphere Research Satellite (UARS) during 1991 to 1995 reveal a semiannual variation in the amplitude of the (…
A Least Squares Method for Spectral Analysis of Space-Time Series Open
Common methods in spectral analyses of satellite data are the discrete Fourier transform (DFT) type of approaches, which generally require regular sampling and uniform spacing. These conditions sometimes cannot be met in the satellite appl…
Atmospheric wind measurements with the high-resolution Doppler imager Open
Peer Reviewed
Observations of the 5‐day wave in the mesosphere and lower thermosphere Open
The 5‐day planetary wave has been detected in the winds measured by the High Resolution Doppler Imager (HRDI) on the Upper Atmosphere Research Satellite (UARS) in the mesosphere and lower thermosphere (50–110 km). The appearances of the 5‐…
A Comparative Study of Coherent & Incoherent Doppler Lidar Techniques Open
Our purpose in this report is two-fold: 1) describe the basics of the coherent and incoherent systems, particularly the latter, and 2) compare the performance of the two technologies in a meaningful way. We conclude that an incoherent syst…
Zonal mean winds in the equatorial mesosphere and lower thermosphere observed by the High Resolution Doppler Imager Open
This paper presents analyses of mesospheric and lower thermospheric zonal mean winds observed by the High Resolution Doppler Imager (HRDI) on the Upper Atmosphere Research Satellite (UARS). Monthly averages of the equatorial zonal mean zon…
Remote sounding of tropospheric minor constituents Open
The etalon interferometer, or Fabry-Perot interferometer (FPI), with its high throughput and high spectral resolution was widely used in the remote-sensing measurements of the earth's atmospheric composition, winds, and temperatures. The m…
Comparison of HRDI wind measurements with radar and rocket observations Open
Wind fields in the mesosphere and lower thermosphere are obtained with the High Resolution Doppler Imager (HRDI) on the Upper Atmosphere Research Satellite (UARS) by observing the Doppler shifts of emission lines in the O 2 Atmospheric ban…
Global mesospheric tidal winds observed by the high resolution Doppler imager on board the Upper Atmosphere Research Satellite Open
This paper presents preliminary results of a study of mesospheric and lower thermospheric diurnal tidal winds obtained with the High Resolution Doppler Imager (HRDI) on the Upper Atmosphere Research Satellite (UARS). Zonal averages of the …
The High Resolution Doppler Imager (HRDI) on the Upper Atmosphere Research Satellite Open
Peer Reviewed