[PDF] Top 20 Horizontally resolved structures of radar backscatter from polar mesospheric layers
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Horizontally resolved structures of radar backscatter from polar mesospheric layers
... Acknowledgements. The authors would like to thank IAP person- nel who worked hard with the installation of MAARSY in par- ticular J¨org Trautner, Thomas Barth, Jens Wedrich, Norbert Engler, Dieter Keuer, Marius Zecha, ... See full document
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A comparison of overshoot modelling with observations of polar mesospheric summer echoes at radar frequencies of 56 and 224 MHz
... apparent from Fig. 2, the upper layers of- ten show a considerable “activity” in the sense that the layers observed by MORRO and VHF often show different shifts in height and ...both ... See full document
11
Geometric considerations of polar mesospheric summer echoes in tilted beams using coherent radar imaging
... of polar mesospheric summer echoes (PMSE) using the Middle Atmosphere Alo- mar Radar System in Northern Norway ...The radar is able to resolve PMSE at high spatial and tempo- ral resolution ... See full document
7
Impact of the January 2012 solar proton event on polar mesospheric clouds
... heating from solar absorption and thus lower temperatures in the sunlit upper stratosphere and lower ...the polar summer in the upper mesosphere and lower thermosphere, while Joule and chemical heating have ... See full document
9
Mesospheric winds derived from SuperDARN HF radar meteor echoes at Halley, Antarctica
... derive mesospheric winds from HF radar observations of meteor echoes at Halley, Antarctica has been ...distinguished from echoes that are backscattered from plasma irregularities in the ... See full document
5
Morphology of tropical mesospheric echoes observed by VHF radar
... of mesospheric echo char- acteristics, ...ticed from Fig. 1. The mesospheric echoes sometimes show (1) descending layers as shown in the left panels of ...patchy layers above/below the ... See full document
6
An improved algorithm for polar cloud-base detection by ceilometer over the ice sheets
... in polar regions due to their effect on cloud ra- diative impact and ...low-power backscatter lidars that run continuously and therefore have the potential to pro- vide basic cloud statistics including ... See full document
15
Initial report on polar mesospheric cloud observations by Himawari-8
... observations from satel- lites can be found in DeLand et ...nadir-viewing from low-Earth-orbit (LEO) ...servations from a GEO satellite were reported using images by Meteosat First Generation (MFG) ... See full document
6
The influence of magnetospheric substorms on SuperDARN radar backscatter
... ionospheric backscatter have been reported during magnetospheric ...SuperDARN backscatter during 3005 substorms and find that the global level of scatter maximizes just prior to substorm ...ionosphere, ... See full document
6
Impacts of a sudden stratospheric warming on the mesospheric metal layers
... Analysis of the Na lidar data for temperature was complicated by the degradation of the seeder in the Nd:YAG pump laser shortly before these measurements started. As a result, two sidebands were generated in the spectrum ... See full document
10
Investigation of gravity waves using horizontally resolved radial velocity measurements
... Alomar Radar System (MAARSY) on the island of Andøya in Northern Nor- way ...observes polar mesospheric summer echoes ...parameters from these horizontally resolved radial wind ... See full document
13
Case study of mesospheric front dissipation observed over the northeast of Brazil
... bore from the west to the zenith and also after its disappear- ...a mesospheric front was also observed in previous works ...a mesospheric front could be indicative of a transition from an ... See full document
9
Solar cycle response and long-term trends in the mesospheric metal layers
... Compared to the lower atmosphere, the upper mesosphere/lower thermosphere region (MLT, 75 – 110 km) is relatively poorly understood due to a critical lack of observations. However, the MLT region is very sensitive to ... See full document
13
Potential for Measurement of Mesospheric Ozone Density from Overdense Meteor Trains with a Monostatic Meteor Radar
... resulting from the density gradient within the trail and relative to the ambient atmosphere, and the other is the electric Coulomb force arising between the ions and ... See full document
302
Spin resolved spectroscopy of the intermediate polar DQ Her
... lines from the accretion disc as presented earlier by Martell et ...light from the WD beam is mainly visible in He II λ4686 when the beam points to the red- shifted back side of the ...expected from ... See full document
12
Empirical Determination of the Effect of Rainfall on Radio Communication (The Case of the Aviation Industry) in Nigeria
... frequency radar with meteorological elements such as ...S-band radar is not only used in civil aviation but also in agriculture to monitor soil moisture, crop yield ... See full document
14
Meteor echo height ceiling effect and mesospheric temperature estimation from meteor radar observations
... teor radar depends not only on the physical characteristics of meteors and the state of the atmosphere but also on the operational parameters of meteor radar such as a radio wave- length and a pulse ... See full document
8
Albedo-Ice Regression method for determining ice water content of polar mesospheric clouds using ultraviolet observations from space
... results from the model, CIPS and SOFIE, using averages over many cloud ...radiance from the model, and from CIPS and SOFIE ...IWC from the regression formu- ... See full document
12
A PROGRESSIVE STUDY FOR THE AUTOMATIC ANALYSIS OF INTERNAL LAYERS FROM POLAR RADAR IMAGERY
... returns from the target while linear feature extraction is ex- ploited using Steger’s ...basement from other echoes, the algorithm exploits a region growing tech- nique, which combines results from ... See full document
65
Investigation of horizontal structures at mesospheric altitudes using coherent radar imaging
... inner structures of PMSE, the Middle Atmosphere Alomar Radar System (MAARSY) on the Norwegian Island Andøya started its operation in ...coherent radar imaging (CRI) and to get a deeper insight into ... See full document
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