搜索结果: 1-15 共查到“地球物理学 radar”相关记录27条 . 查询时间(0.104 秒)
We are all too familiar with severe weather on Earth, but many of us aren’t aware of the severe weather in space – the varying conditions between the sun and the Earth, including solar wind, flares an...
Nonspecular meteor trail altitude distributions and durations observed by a 50 MHz high‐power radar
durations observed trail altitude distributions
2017/3/22
High‐power large‐aperture (HPLA) radars frequently observe nonspecular meteor trail
echoes that result from plasma turbulence driven by the intense pressure gradients on
the trail edges. This paper ...
Latest improvements for the echo sounding system of the Italian radar glaciological group and measurements in Antarctica
radioglaciology ground penetrating radar ice thickness measurements
2015/10/8
Radio echo sounding is an active remote-sensing method using electromagnetic wave penetration in a particular medium such as ice and permits the measurements of its thickness, the level of the bedrock...
Mapping plasma structures in the high-latitude ionosphere using beacon satellite, incoherent scatter radar and ground-based magnetometer observations
Beacon satellites ionospheric plasma
2015/9/25
In the autumn of the year 2000, four radio receivers capable of tracking various beacon satellites were set up along the southwestern coast of Greenland. They are used to reconstruct images of the ion...
Ionospheric Doppler measurements by means of HF-radar techniques
shift Doppler ionosphere plasma drift
2015/9/10
Studies of the dynamics of the ionosphere and its related phenomena are mainly based on Doppler Drift measurements. The time variation (ionisation/recombination) of plasma density, thermospheric wind ...
Some considerations for different time-domain signal processing of pulse compression radar
code correlation ionosphere radar time domain
2015/8/28
Radar technology has for a long time used various systems that allow detection under high-resolution conditions, while emitting at the same time low peak power. Among these systems, transmitted pulse ...
Annex to:Volcanic Ash Cloud Observation using Ground-based Ka-band Radar and Near-Infrared Lidar Ceilometer during the Eyjafjallajökull eruption
Earthquake GPS Historical seismology Ionosphere Irpinia
2015/8/18
Volcanic ash plumes are formed during explosive volcanic eruptions. After advection over several thousands of kilometers, volcanic ash particles are highly fragmented, dispersed and aged with micron- ...
Volcanic Ash Cloud Observation using Ground-based Ka-band Radar and Near-Infrared Lidar Ceilometer during the Eyjafjallajökull eruption
Volcanic eruptions radar lidar
2015/8/18
Active remote sensing techniques can probe volcanic ash plumes, but their sensitivity at a given distance depends upon the sensor transmitted power, wavelength and polarization capability. Building on...
Interpretation of non-specular radar meteor trails
radar meteor trails consistent features
2017/3/22
Radar data of non-specular meteor trails shows two
clear and consistent features: (1) non– specular meteor trails
are observed from a narrower altitude range than are head
echoes and (2) an approxi...
Particle‐in‐cell simulation of incoherent scatter radar spectral distortions related to beam‐plasma interactions in the auroral ionosphere
incoherent scatter radar auroral ionosphere
2017/3/22
An electrostatic parallel particle‐in‐cell (EPPIC) code that allows for particle beam
injections and multiple boundary conditions is used to investigate the beam‐plasma
interaction and its manifesta...
Concept study of radar sensors for near-field tsunami early warning
Concept study radar sensors near-field tsunami early warning
2010/10/21
Off-shore detection of tsunami waves is a critical component of an effective tsunami early warning system (TEWS). Even more critical is the off-shore detection of local tsunamis, namely tsunamis that ...
Assessment of the performance of X-band satellite radar data for landslide mapping and monitoring: Upper Tena Valley case study
performance X-band satellite radar data landslide mapping monitoring Upper Tena Valley case study
2010/10/21
The aim of this work is to analyse the advantages and disadvantages of using the new X-band SAR data acquired by TerraSAR-X sensors for landslides mapping. This dataset has been processed using a Pers...
A multiscale approach to estimating topographically correlated propagation delays in radar interferograms
atmospheric dela multiscale analysis InSAR Long Valley Caldera Tocopilla earthquake
2014/4/9
When targeting small amplitude surface deformation, using repeat orbit Interferometric Synthetic Aperture Radar (InSAR) observations can be plagued by propagation delays, some of which correlate with ...
Investigating turbulent structure of ionospheric plasma velocity using the Halley SuperDARN radar
turbulent structure ionospheric plasma velocity Halley SuperDARN radar
2009/11/3
We present a detailed analysis of the spatial structure of the ionospheric plasma velocity in the nightside F-region ionosphere, poleward of the open-closed magnetic field line boundary (OCB), i.e. in...
On the Compression of Digital Radar Data.