Results 21 to 30 of about 11,239 (255)

An SFDI Observer–Based Scheme for a General Aviation Aircraft [PDF]

International Journal of Applied Mathematics and Computer Science, 2013
Abstract The problem of detecting and isolating sensor faults (sensor fault detection and isolation-SFDI) on a general aviation aircraft, in the presence of external disturbances, is considered. The proposed approach consists of an extended Kalman observer applied to an augmented aircraft plant, where some integrators are added to the ...
Marco Ariola, Massimiliano Mattei, Immacolata Notaro, Federico Corraro, Adolfo Sollazzo   +4 more
openaire   +8 more sources

Auto Sweptback Wing Based on Low Scattering Demand for an Unmanned Aerial Vehicle in Phase Flight

Aerospace, 2022
In order to study the optimal sweepback angle when a variant unmanned aerial vehicle (UAV) exhibits a low radar cross-section (RCS) indicator during phase flight, an auto sweep scheme based on electromagnetic scattering evaluation and an improved ...
Zeyang Zhou, Jun Huang
doaj   +1 more source

EUREC ⁴ A observations from the SAFIRE ATR42 aircraft [PDF]

Earth System Science Data, 2022
Abstract. As part of the EUREC4A (Elucidating the role of cloud-circulation coupling in climate) field campaign, which took place in January and February 2020 over the western tropical Atlantic near Barbados, the French SAFIRE ATR42 research aircraft conducted 19 flights in the lower troposphere.
S. Bony, M. Lothon, J. Delanoë, P. Coutris, J.-C. Etienne, F. Aemisegger, A. L. Albright, T. André, H. Bellec, A. Baron, J.-F. Bourdinot, P.-E. Brilouet, P.-E. Brilouet, A. Bourdon, J.-C. Canonici, C. Caudoux, P. Chazette, M. Cluzeau, C. Cornet, J.-P. Desbios, D. Duchanoy, C. Flamant, B. Fildier, C. Gourbeyre, L. Guiraud, T. Jiang, C. Lainard, C. Le Gac, C. Lendroit, J. Lernould, T. Perrin, F. Pouvesle, P. Richard, N. Rochetin, K. Salaün, A. Schwarzenboeck, G. Seurat, B. Stevens, J. Totems, L. Touzé-Peiffer, G. Vergez, J. Vial, L. Villiger, R. Vogel   +43 more
openaire   +8 more sources

Aircraft observations of a lightning channel in STEPS [PDF]

Geophysical Research Letters, 2003
We analyze a portion of an intracloud lightning channel that was captured on video by an instrumented aircraft and mapped three‐dimensionally by a ground‐based lightning mapping array (LMA). By comparing the electric fields measured on the aircraft with a model which simulates the electrostatic field present after charge was effectively deposited by ...
Tom A. Warner, John H. Helsdon, Andrew G. Detwiler   +2 more
openaire   +1 more source

METHODS OF PRECISE AIRCRAFT POSITIONING IN THE GPS SYSTEM WITH AN APPLICATION OF THE TROPOSPHERE CORRECTION [PDF]

Scientific Journal of Silesian University of Technology. Series Transport, 2020
This article presents the results of studies concerning the designation of accuracy in aircraft navigation positioning by means of the SPP and the SBAS code methods.
Małgorzata KIRSCHENSTEIN, Kamil KRASUSKI, Artur GOŚ   +2 more
doaj   +1 more source

Evaluation of Cloud Microphysical Properties Derived From MODIS and Himawari‐8 Using In Situ Aircraft Measurements Over the Southern Ocean

Earth and Space Science, 2020
Cloud microphysical properties from aircraft measurements during the Southern Ocean Clouds, Radiation, Aerosol Transport Experimental Study are used to evaluate the cloud products from the geostationary satellite Himawari‐8 (H‐8) and the polar‐orbiting ...
Lijun Zhao, Chuanfeng Zhao, Yang Wang, Yuan Wang, Yikun Yang   +4 more
doaj   +1 more source

Locating industrial VOC sources with aircraft observations

Environmental Pollution, 2011
Observation and characterization of environmental pollution, focussing on Volatile Organic Compounds (VOCs), in a high-risk industrial area, are particularly important in order to provide indications on a safe level of exposure, indicate eventual priorities and advise on policy interventions.
P Toscano, B Gioli, S Dugheri, A Salvini, A Matese, A Bonacchi, A Zaldei, V Cupelli, F Miglietta   +8 more
openaire   +7 more sources

Comparison of aircraft observations with ensemble forecast model results in terms of the microphysical characteristics of stratiform precipitation

Atmospheric and Oceanic Science Letters, 2020
The prediction of the particle number concentration and liquid/ice water content of cloud is significant for many aspects of atmospheric science. However, given the uncertainties in the initial and boundary conditions and imperfections of microphysical ...
Yuan FU, Hengchi LEI, Jiefan YANG, Jiaxu GUO, Jiangshan ZHU   +4 more
doaj   +1 more source

Evaluation of single-footprint AIRS CH₄ profile retrieval uncertainties using aircraft profile measurements [PDF]

Atmospheric Measurement Techniques, 2021
We evaluate the uncertainties of methane optimal estimation retrievals from single-footprint thermal infrared observations from the Atmospheric Infrared Sounder (AIRS).
S. S. Kulawik, J. R. Worden, V. H. Payne, D. Fu, S. C. Wofsy, S. C. Wofsy, K. McKain, K. McKain, C. Sweeney, B. C. Daube Jr., B. C. Daube Jr., A. Lipton, A. Lipton, I. Polonsky, Y. He, K. E. Cady-Pereira, E. J. Dlugokencky, D. J. Jacob, D. J. Jacob, Y. Yin   +19 more
doaj   +1 more source

Extended Signal-Correction Observer and Application to Aircraft Navigation [PDF]

IEEE Transactions on Industrial Electronics, 2020
In this paper, an extended signal-correction observer (ESCO) is presented for signals correction and estimation, which not only can reject the large measurement error, but also the system uncertainty can be estimated, in spite of the existence of intense stochastic non-Gaussian noise.
Xinhua Wang 0001, Weicheng Wang
openaire   +1 more source