The Upper Atmosphere Research Satellite (UARS) mission

Reber, C. A.; Trevathan, Charles E.; McNeal, Robert J.; Luther, Michael R.

doi:10.1029/92jd02828

Cited by 170 publications

(95 citation statements)

References 1 publication

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“…The orbital period is 96 min, and the precession rate is 5 ø d -l, so that all local times are sampled every 36 days. The UARS mission was described in detail by Reber et al [1993].…”

Section: Methodsmentioning

confidence: 99%

Climatology of middle‐ and low‐latitude daytime F region disturbance neutral winds measured by Wind Imaging Interferometer (WINDII)

Emmert¹,

Fejer²,

Fesen³

et al. 2001

J. Geophys. Res.

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“…The orbital period is 96 min, and the precession rate is 5 ø d -l, so that all local times are sampled every 36 days. The UARS mission was described in detail by Reber et al [1993].…”

Section: Methodsmentioning

confidence: 99%

Climatology of middle‐ and low‐latitude daytime F region disturbance neutral winds measured by Wind Imaging Interferometer (WINDII)

Emmert¹,

Fejer²,

Fesen³

et al. 2001

J. Geophys. Res.

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“…In this study, any possible uncertainties that could arise from the ®niteness of the sampling volume in the sampling space are called`o bservational errors.'' The Upper-Atmosphere Research Satellite (UARS), launched on 12 September 1991, measures vertical pro®les of temperature, concentrations of trace gasses, and horizontal wind velocities (Reber et al, 1993). Extensive e orts have been made to validate the measurements by using the correlative data provided by balloons, radars, etc.…”

Section: Introductionmentioning

confidence: 99%

Validation of HRDI MLT winds with meteor radars

et al. 1997

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Abstract. A validation study of the mesospheric and lower-thermospheric (MLT) wind velocities measured by the High-Resolution Doppler Imager (HRDI) on board the Upper-Atmosphere Research Satellite (UARS) has been carried out, comparing with observations by meteor radars located at Shigaraki, Japan and Jakarta, Indonesia. The accuracy of the HRDI winds relative to the meteor radars is obtained by a series of simultaneous wind measurements at the time of UARS overpasses. Statistical tests on the di erence in the wind vectors observed by HRDI and the meteor radars are applied to determine whether the wind speed has been overestimated by HRDI (or underestimated by the MF radars) as previously noticed in HRDI vs. MF radar comparisons. The techniques employed are the conventional t-test applied to the mean values of the paired wind vector components as well as wind speeds, and two nonparametric tests suitable for testing the paired wind speed. The square-root transformation has been applied before the t-tests of the wind speed in order to ®t the wind-speed distribution function to the normal distribution. The overall results show little evidence of overestimation by HRDI (underestimation by meteor radars) of wind velocities in the MLT region. Some exceptions are noticed, however, at the altitudes around 88 km, where statistical di erences occasionally reach a level of signi®cance of 0.01. The validation is extended to estimate the precision of the wind velocities by both HRDI and meteor radars. In the procedure, the structure function de®ned by the mean square di erence of the observed anomalies is applied in the vertical direction for the pro®le data. This method assumes the isotropy and the homogeneity of variance for the physical quantity and the homogeneity of variance for the observational errors. The estimated precision is about 6 m s À1 for the Shigaraki meteor radar, 15 m s À1 for the Jakarta meteor radar, and 20 m s À1 for HRDI at 90-km altitude. These values can be used to con®rm the statistical signi®cance of the wind ®eld obtained by averaging the observed winds.

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“…Comparisons to results from the high-resolution Doppler imager (HRDI) instrument aboard the upper atmosphere research satellite (UARS) [Reber et al, 1993] …”

mentioning

confidence: 99%

A comparison of winds measured by meteor radar systems and an MF radar at Buckland Park

Valentic¹,

Avery²,

Avery³

et al. 1997

Radio Science

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Abstract. This paper describes a comparison of winds measured by the meteor echo detection and collection (MEDAC) system and a collocated spaced antenna MF radar at the Buckland Park field station near Adelaide, Australia (35øS, 138øE). A previous paper has described a detailed comparison between the MEDAC and Adelaide meteor radar system which was also operated during the campaign. In this paper, which uses only hand-classified underdense meteor echoes, the meteor horizontal zonal wind velocities were compared to the those produced by the MF spaced antenna system. Care was taken when interpreting the comparison results in light of the varying meteor data rates. A point-to-point comparison showed that the excursions seen in the meteor data tended to be larger than those in the MF data. Excellent agreement was found between the two systems and relevant model results across the observed heights for both the mean winds and tides.

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The Upper Atmosphere Research Satellite (UARS) mission

Cited by 170 publications

References 1 publication

Climatology of middle‐ and low‐latitude daytime F region disturbance neutral winds measured by Wind Imaging Interferometer (WINDII)

Climatology of middle‐ and low‐latitude daytime F region disturbance neutral winds measured by Wind Imaging Interferometer (WINDII)

Validation of HRDI MLT winds with meteor radars

A comparison of winds measured by meteor radar systems and an MF radar at Buckland Park

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