[PDF] Top 20 Statistical characteristics of PMWE observations by the EISCAT VHF radar
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Statistical characteristics of PMWE observations by the EISCAT VHF radar
... of PMWE. Right panel – outside of PMWE layers, but in altitude range where PMWE ...that PMWE occur at rather low altitudes, where spectral broadening due to nega- tive ions occurs and we do ... See full document
17
ANGEO - Ion upflow and downflow at the topside ionosphere observed by the EISCAT VHF radar
... 3 Statistical analysis We have used the following quantitative de®nition for selecting the ion up¯ow and down¯ow events from the CP 7 ...the statistical characteristics of the ion up¯ow and ... See full document
12
ANGEO - Frequency domain interferometry mode observations of PMSE using the EISCAT VHF radar
... The last example of spectrogram data is shown in Fig. 14. The notable characteristics of the spectra are the occasionally extremely narrow widths and numer- ous jumps. During the time interval when the spectro- ... See full document
14
VHF radar and MF/HF dynasonde observations during Polar Mesosphere Summer Echoes conditions at EISCAT
... The EISCAT VHF radar (224 MHz) and the EISCAT dynasonde (1–10 MHz) were operated simultaneously during a Polar Mesosphere Summer Echoes (PMSE) event on 22 June ...echo characteristics ... See full document
8
Characteristics of the layered polar mesosphere summer echoes occurrence ratio observed by EISCAT VHF 224 MHz radar
... Figure 4. Mean seasonal variation of the total PMSE occurrence ratio. CAT radar does not provide continuous PMSE observations. We raise an important question: Table 3 indicates a difference in total ... See full document
11
D region observations by VHF and HF radars during a rocket campaign at Andøya dedicated to investigations of PMWE
... Alomar Radar System (MAARSY) was operated to detect PMWE with multiple beam directions to detect favorable launch ...the radar beam along the planned trajectory of the ...special radar ... See full document
13
Statistical characteristics of low-latitude ionospheric field-aligned irregularities obtained with the Piura VHF radar
... continuous observations, the seasonal and diur- nal occurrences, as well as Doppler velocities, have also been presented and ...morphological characteristics of the lower echoes and their Doppler velocities ... See full document
10
Statistical characteristics of low-latitude ionospheric field-aligned irregularities obtained with the Piura VHF radar
... the statistical charac- teristics of echoes from ionospheric (E- and F-region) field- aligned irregularities obtained with the Piura VHF ...This radar is located at ...intermittent ... See full document
11
Tristatic observation of polar mesosphere winter echoes with the EISCAT VHF radar on 8 January 2014: a case study
... of PMWE of about 6-min duration was detected, the spectra of the received signal were analysed for the Tromsø site and altitude profiles of spectral parameters were ...and PMWE at the same height: the wind ... See full document
12
Climatological features of electron density in the polar ionosphere from long-term observations of EISCAT/ESR radar
... A statistical analysis of the seasonal characteristics of elec- tron density in the polar ionospheric F2-layer has been car- ried out on the basis of long-term EISCAT and ESR observa- ...maximum, ... See full document
9
Range imaging observations of PMSE using the EISCAT VHF radar: Phase calibration and first results
... International EISCAT Workshop” ...(EISCAT) VHF radar during a 2002 experiment with the goal of characterizing the vertical structure of Polar Mesosphere Summer Echoes (PMSE) over northern ... See full document
14
ANGEO - Mesospheric observations with the EISCAT UHF radar during polar cap absorption events: 3. Comparison with simultaneous EISCAT VHF measurements
... 4 Comparison of results from dierent measurement schemes 4.1 Vertically directed VHF radar observations The ®rst half-hour of VHF radar operations on 20 March 1990 used a vertical ... See full document
12
ANGEO - VHF radar observations of gravity waves at a low latitude
... 4 Variance studies Figure 5 depicts the altitude variations of variance (DV 2 ) for dierent days. Since gravity wave activity appears to increase exponentially with height, we have ®tted curves (solid lines) of the form ... See full document
8
Simultaneous observations of the main trough using GPS imaging and the EISCAT radar
... The EISCAT UHF radar was operated on 7 January 2002 in a special program mode in order to provide an independent comparison to the MIDAS ...The radar experiment, tau3t limb UK@uhf, consisted of a ... See full document
5
ANGEO - A statistical study of underestimates of wind speeds by VHF radar
... The radar makes use of ®ve transmitters providing a combined peak power of 160 kW with a maximum duty cycle of ...Only radar measurements with a signal-to-noise ratio in excess of 4 dB were ...the ... See full document
8
Simultaneous radar and spaced receiver VHF scintillation observations of ESF irregularities
... scintillation observations (Bhattacharyya et al., 2001) and radar observations combined with scintillation observations (Rodrigues et ...of radar plumes, and hence larger spectral ... See full document
9
Simultaneous radar and spaced receiver VHF scintillation observations of ESF irregularities
... scintillation observations (Bhattacharyya et al., 2001) and radar observations combined with scintillation observations (Rodrigues et ...of radar plumes, and hence larger spectral ... See full document
9
ANGEO - VHF radar observations of turbulent structures in the polar mesopause region
... Abstract. The mobile SOUSY VHF Radar was operated in the summer of 1987 during the MAC/SINE campaign in northern Norway to study the polar mesosphere summer echoes (PMSE). Measurements of the spectral width ... See full document
9
ANGEO - Vertical velocities associated with gravity waves measured in the mesosphere and lower thermosphere with the EISCAT VHF radar
... 6 Conclusions We have presented analysis of 31 days of vertical-wind records made using the EISCAT VHF radar between 12 June, 1990 and 25 January, 1993. The motion ®eld appears to be dominated by ... See full document
13
Anisotropy of Doppler spectral parameters in the VHF radar observations at MU and White Sands
... Abstract. Significant differences are found between the mean spectral widths from beams in the meridional plane and in the zonal plane at both the MU and the White Sands VHF radars. The spectral width in the beam ... See full document
6
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