Results 51 to 60 of about 101 (79)

The mesosphere and metals: chemistry and changes. [PDF]

Chem Rev, 2015
Plane JM, Feng W, Dawkins EC.
europepmc   +1 more source

Characterization of the Surfaces and Near-Surface Atmospheres of Ganymede, Europa and Callisto by JUICE. [PDF]

Space Sci Rev
Tosi F, Roatsch T, Galli A, Hauber E, Lucchetti A, Molyneux P, Stephan K, Achilleos N, Bovolo F, Carter J, Cavalié T, Cimò G, D'Aversa E, Gwinner K, Hartogh P, Huybrighs H, Langevin Y, Lellouch E, Migliorini A, Palumbo P, Piccioni G, Plaut JJ, Postberg F, Poulet F, Retherford K, Rezac L, Roth L, Solomonidou A, Tobie G, Tortora P, Tubiana C, Wagner R, Wirström E, Wurz P, Zambon F, Zannoni M, Barabash S, Bruzzone L, Dougherty M, Gladstone R, Gurvits LI, Hussmann H, Iess L, Wahlund JE, Witasse O, Vallat C, Lorente R.   +46 more
europepmc   +1 more source

Current and Near-Term Earth-Observing Environmental Satellites, Their Missions, Characteristics, Instruments, and Applications. [PDF]

Sensors (Basel)
Ustin SL, Middleton EM.
europepmc   +1 more source

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Real‐Time Techniques for Interpretation of Ionospheric Backscatter Sounding Data

Radio Science, 2019
AbstractWe present techniques and algorithms for automatic processing and interpretation of data of ionospheric backscatter sounding (BS) using a continuous chirp signal. Experimental ionograms are processed based on data filtration with further compression using the cellular automaton method.
Vladimir Kurkin, Maksim Penzin, Sergey Ponomarchuk   +2 more
exaly   +2 more sources

Investigation of Low-Latitude Ionospheric Field-Aligned Irregularities by Oblique Backscatter Sounding

IEEE Geoscience and Remote Sensing Letters, 2010
The ionosphere is not homogeneous, hosting many irregularities with different scales from dozens of meters to dozens of kilometers. The observation and formation mechanism of the irregularities is among the most active domains for understanding the influence of irregularities on propagation of radio waves.
Yuannong Zhang
exaly   +2 more sources

The Real-time Diagnostics of HF Radio Channel on the Base of Ionospheric Backscatter Sounding Data

2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science, 2020
The method of real-time diagnostics for decameter radio channel on the base ionosphere backscatter sounding data by continuous chirp signal is presented. The method is based on the extraction of the backscatter signal leading edge under processing and interpretation of experimental ionograms.
Vladimir Kurkin
exaly   +2 more sources

Inversion of Ionospheric Sounding Data from an HF Backscatter Radar

Inverse Problems and Theoretical Imaging, 1990
For radio waves in the high-frequency band (6–30 MHz), the ionospheric plasma is a refractive medium, with an index which depends on local electron density. HF backscatter radars can use this property to take soundings of the ionosphere by transmitting radio pulses at low elevation angles (see fig. 1).
F Gauthier
exaly   +2 more sources

A Novel Ionospheric Oblique-Incidence Sounding Network Consisting of the Ionospheric Oblique Backscatter Sounder and the Parasitic Oblique-Incidence Sounder

IEEE Geoscience and Remote Sensing Letters, 2015
In this letter, a novel ionospheric oblique-incidence sounding network consisting of the ionospheric oblique backscatter sounder and the parasitic oblique-incidence sounder is presented. With the new configuration, the oblique ionogram and the backscatter ionogram can be provided at the same time.
Shuzhu Shi, Guobin Yang, Zhengyu Zhao 0002, Jing-nan Liu   +3 more
exaly   +2 more sources

An algorithm for the removal of radio frequency interference in ionospheric backscatter sounding

Radio Science, 1991
In common with all wideband ionospheric sounding systems the backscatter technique is susceptible to contamination by radio frequency interference. The eradication of such interference is imperative in systems required to automatically interrogate the backscatter sounder data base.
exaly   +2 more sources

Forecast of HF Radio Channel from Data of Ionospheric Backscatter Sounding

2024 IEEE 9th All-Russian Microwave Conference (RMC)
Sergey Ponomarchuk
exaly   +2 more sources