Coincident<i>F</i>-region temperature determinations from incoherent backscatter and Doppler broadening of [O I] 6300 A

Cogger, L. L.; Nelson, Gareth; Biondi, Manfred A.; Hake, R. D.; Sipler, D. P.

doi:10.1029/ja075i025p04887

Cited by 26 publications

(10 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This measurement was made in the equatorial region during solar maximum. For the other reported determinations [70,71], the temperature measured with the radar and the optical measurements was found to be, within the uncertainty of the measurements, the same.…”

Section: Ground-based Optical Measurements Of Winds and Temperatures supporting

confidence: 55%

“…In general, measurements taken after 1973 have this contamination problem resolved, and the reported results can be taken on face value as good representations of the thermospheric temperature at the mean height of emission. At about this time, comprehensive ground-based optical studies of the thermosphere at sites ranging from the auroral zone [73] to the equatorial zone [69,71] were initiated.…”

Section: Ground-based Optical Measurements Of Winds and Temperatures mentioning

confidence: 99%

See 1 more Smart Citation

Optical measurements of winds and kinetic temperatures in the upper atmosphere

Hernández

Killeen

1988

Advances in Space Research

View full text Add to dashboard Cite

was used to determine the thermospheric neutral motions in the auroral zone. These measurements were compared with simultaneously measured ion drifts, obtained with the Chatanika incoherent backscatter radar [73], see Figure 3. This comparison showed that the neutral wind in the evening sector flowed in a generally sunward direction, in correspondence with the direction of ion convection, but opposite to that which would be expected from a consideration of solar heating alone. Further analysis of the 1972-73 data set [74] was presented, together with a modelling study of the auroral momentum equation, to suggest that ion drag was playing an important role in establishing the sunward neutral wind. This work was in accord with independent experimental results using rocket chemical release vapour trail analysis [75-77]. A more recent paper [78] has compared the optical meridional wind measurements made in Alaska during 1972 with determinations of the same parameter made using the Chatanika incoherent scatter radar. Reasonable agreement was found between the two (optical and radar) techniques, both for averaged wind patterns and for simultaneously observed winds from individual nights; this is illustrated in Figure 4. The experimental results from this study were also compared with the predictions of the NCAR-TGCM; the comparison indicated reasonable agreement and was suggestive of a possible heat source poleward of Chatanika.

show abstract

Section: Ground-based Optical Measurements Of Winds and Temperatures supporting

confidence: 55%

Section: Ground-based Optical Measurements Of Winds and Temperatures mentioning

confidence: 99%

Optical measurements of winds and kinetic temperatures in the upper atmosphere

Hernández

Killeen

1988

Advances in Space Research

View full text Add to dashboard Cite

show abstract

“…Initial comparisons of nighttime thermospheric temperatures measured by ground-based Fabry-Perot interferometers with temperatures determined using empirical models and incoherent scatter showed reasonable agreement [Biondi and Feibelman, 1968;Hays et al, 1970;Cogger et al, 1970;Hernandez et al, 1975]…”

Section: Introductionmentioning

confidence: 88%

Comparison of OGO 6 measured thermospheric temperatures with the MSIS‐86 empirical model

Hedin

Thuillier²

1988

J. Geophys. Res.

View full text Add to dashboard Cite

The thermospheric temperatures measured by the Fabry-Perod interferometer on the OGO 6 satellite are found to be reasonably represented by the mass spectrometer/incoherent scatter 1986 (MSIS-86) empirical model except for two anomalies, one in the South Atlantic and the other near noon local time. These anomalies are likely due to measurement problems. The OGO 6 temperature data were not used in the generation of the MSIS models, so this is an independent comparison of measured and model temperatures. The measurements were made primarily during daytime at mid to low latitudes and throughout the day at high latitudes. On average, the measured temperatures are 16 K below the MSIS-86 model temperatures. Latitude gradients during solstices as well as for the yearly average are well represented by the model, as are high-latitude longitudinal and magnetic activity variations.

show abstract

“…The calculations were developed for the nighttime period where there is little or no energy input into the F region and the ion, electron and neutral temperatures at a given height should be equal [ Cogger et al , 1970]. Also, the calculations follow the ionospheric peak hmF2 , where the vertical gradients of electron density, ion, electron, and neutral temperatures can be neglected, i.e., ≈ ≈ ≈ 0 [ Vasseur , 1969; Behnke and Kohl , 1974].…”

Section: Isr Data Distribution and Methodologymentioning

confidence: 99%

Using incoherent scatter radar to investigate the neutral wind long-term trend over Arecibo

et al. 2011

View full text Add to dashboard Cite

[1] Thermospheric neutral winds can be the most important driver when modeling ionospheric densities and temperatures. Several papers in this special edition show interesting features of the neutral winds behavior during the last 30 years at the Arecibo Observatory (18.3°N, 66.75°W; ∼28.25°dip latitude) using Fabry-Perot Interferometer (FPI) data. A neutral wind vector that changes its direction, becoming more dominantly eastward over the years and a meridional neutral wind component that decreases in magnitude, were found. The main goal of this work is to look for similar evidence of long-term trends in the radar derived winds that might support these recent discoveries and explore the associated ionospheric parameter measurements to look for the effects of these changing winds on the ionosphere. With this purpose in mind, Incoherent Scatter Radar (ISR) measurements of the F region vector drifts are used to derive the corresponding meridional thermospheric neutral wind along the magnetic field over Arecibo during 20 years. Major findings include a decreasing long-term trend (lowering) of the height where the F2-layer peak density occurs (hmF2), which could be related with a more increased downward flux of the ionosphere. A slight decrease in the peak density of the F2-layer (NmF2) after local midnight also was found during the period studied. The meridional wind along the magnetic field derived from ISR data also revealed a long-term trend, becoming more northward during the period studied, with a maximum variation between 02:30UT and 05:30UT.Citation: Santos, P. T., C. G. M. Brum, C. A. Tepley, N. Aponte, S. A. González, and E. Robles (2011), Using incoherent scatter radar to investigate the neutral wind long-term trend over Arecibo,

show abstract

CoincidentF-region temperature determinations from incoherent backscatter and Doppler broadening of [O I] 6300 A

Cited by 26 publications

References 4 publications

Optical measurements of winds and kinetic temperatures in the upper atmosphere

Optical measurements of winds and kinetic temperatures in the upper atmosphere

Comparison of OGO 6 measured thermospheric temperatures with the MSIS‐86 empirical model

Using incoherent scatter radar to investigate the neutral wind long-term trend over Arecibo

Contact Info

Product

Resources

About