Results 81 to 90 of about 96,176 (211)

Comparison of Metal-Backed Free-Space and Open-Ended Coaxial Probe Techniques for the Dielectric Characterization of Aeronautical Composites

Sensors, 2016
The trend in the last few decades is that current unmanned aerial vehicles are completely made of composite materials rather than metallic, such as carbon-fiber or fiberglass composites.
Patricia López-Rodríguez, David Escot-Bocanegra, David Poyatos-Martínez, Frank Weinmann   +3 more
doaj   +1 more source

SIREV - Sector Imaging Radar for Enhanced Vision [PDF]

, 2001
SIREV (Sector Imaging Radar for Enhanced Vision) is an innovative radar system which can supply high-quality images of a sector in front of an aircraft under almost every weather condition.
Witte, Franz, Mittermayer, Josef, Wendler, Michael, Moreira, Alberto, Krieger, Gerhard   +4 more
core  

Mesoscale observations of Joule heating near an auroral arc and ion-neutral collision frequency in the polar cap E region [PDF]

, 2011
We report on the first mesoscale combined ionospheric and thermospheric observations, partly in the vicinity of an auroral arc, from Svalbard in the polar cap on 2 February 2010. The EISCAT Svalbard radar employed a novel scanning mode in order to obtain
Wild, J.A., Yiu, I., Kosch, M.J., Anderson, C., I. Yiu, Y. Ogawa, Aruliah, A., Tsuda, T., I. W. McCrea, L. J. Baddeley, S. Nozawa, Howells, V., A. Aruliah, J. A. Wild, McCrea, I.W., V. Howells, Ogawa, Y., Nozawa, S., M. J. Kosch, C. Anderson, Baddeley, L.J., T. Tsuda   +21 more
core   +1 more source

Toward Autonomous Navigation of UAVs in 3-D Space: An 8×8 FMCW MIMO Radar With 90$^{\circ }$ Biaxial FOV at 120 GHz

IEEE Journal of Microwaves
As drones and unmanned aerial vehicles (UAVs) continue to proliferate across diverse application domains, the demand for higher levels of onboard automation steadily increases.
Tobias Welling, David Starke, Christian Bredendiek, Valentina Palazzi, Tobias T. Braun, Luca Roselli, Nils Pohl   +6 more
doaj   +1 more source

Monolithic Millimeter-ware Frequency Multipliers [PDF]

, 2011
l'obbiettivo di questa tesi è la progettazione di moltiplicatori di frequenza monolitici in tecnologia INFINEON SiGe bipolare. I moltiplicatori progettati sono frequency octuplers basati su tre frequency doublers in cascata seguiti da un buffer d'uscita.
Fant, Tommaso
core  

An auroral westward flow channel (AWFC) and its relationship to field-aligned current, ring current, and plasmapause location determined using multiple spacecraft observations [PDF]

, 2007
An auroral westward flow channel (AWFC) is a latitudinally narrow channel of unstable F-region plasma with intense westward drift in the dusk-to-midnight sector ionosphere.
P. M. E. Décréau, Waters, C. L., Parkinson, M. L., Lucek, E. A., Lester, M., Lucek, E., Wild, J. A., J. A. Wild, Décréau, P. M. E., M. L. Parkinson, M. Lester, C. L. Waters, E. A. Lucek   +12 more
core   +1 more source

Sector Imaging Radar for Enhanced Vision [PDF]

, 2001
SIREV (Sector Imaging Radar for Enhanced Vision) is an innovative radar system which can supply high-quality images of a sector in front of an aircraft under almost every weather condition.
Witte, Franz, Mittermayer, Josef, Keydel, Wolfgang, Moreira, Alberto, Wendler, Michael, Krieger, Gerhard   +5 more
core  

HIGH-FREQUENCY RADAR FOR COASTAL AREAS MONITORING

Journal of the Russian Universities. Radioelectronics, 2019
Introduction. The modern approach for ensuring marine activities of necessary quality related to the assessment of current information on the state of the ocean environment in Russia is clearly insufficient. The development of operational methods and instruments of observation, as well as the assessment of the state of the ocean and its forecast ...
V. I. Veremyev, V. M. Kutuzov, K. S. Plotnitskaya, V. V. Kovalenko, V. A. Telegin   +4 more
openaire   +3 more sources

Fundamental aspects of netted radar performance [PDF]

, 2010
Netted radar employs several spatially distributed transmitters and receivers for information retrieval. This system topology offers many advantages over traditional monostatic and bistatic systems which use a single transmitter and a single receiver ...
Teng, Y.
core  

Superdarn radar HF propagation and absorption response to the substorm expansion phase [PDF]

, 2002
International audienceCoherent scatter HF ionospheric radar systems such as SuperDARN offer a powerful experimental technique for the investigation of the magnetospheric substorm.
J. A. Davies, Milan, S. E., Honary, F., T. K. Yeoman (7601525), J. A. Davies (4412452), J. K. Gauld (7674179), F. Honary (7604621), T. K. Yeoman, Davies, J. A., S. E. Milan, J. K. Gauld, F. Honary, Yeoman, T. K., S. E. Milan (7594526), Gauld, J. K.   +14 more
core   +1 more source