Results 21 to 30 of about 122,168 (344)

Nonlinear mechanisms in passive microwave devices [PDF]

open access: gold, 2011
Premi extraordinari doctorat curs 2010-2011, àmbit d’Enginyeria de les TICThe telecommunications industry follows a tendency towards smaller devices, higher power and higher frequency, which imply an increase on the complexity of the electronics ...
Rocas Cantenys, Eduard
core   +5 more sources

All-passive microwave-diode nonreciprocal metasurface

open access: yesCommunications Physics, 2023
Breaking reciprocity in the microwave frequency range is strongly desirable in the development of modern electronic systems, as it enables nonreciprocal wave absorbing, nonreciprocal beam steering, frequency conversion, and protection of sensitive ...
Xiaozhen Yang   +2 more
doaj   +3 more sources

Simulations to characterize a passive microwave blackbody design [PDF]

open access: green2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2015
This paper discusses the design of a microwave blackbody to be used as a primary laboratory standard for passive remote sensing applications. This temperature adjustable design is required to operate and be fully characterized from 10 to 220 GHz.
Houtz, Derek A.   +2 more
openaire   +4 more sources

Studies of atmospheric water vapor by means of passive microwave techniques [PDF]

open access: green, 1967
Atmospheric water vapor determined with passive microwave ...
Gaut, N. E.
core   +2 more sources

MAPSM: A Spatio-Temporal Algorithm for Merging Soil Moisture from Active and Passive Microwave Remote Sensing

open access: yesRemote Sensing, 2016
Availability of soil moisture observations at a high spatial and temporal resolution is a prerequisite for various hydrological, agricultural and meteorological applications.
Sat Kumar Tomer   +5 more
doaj   +3 more sources

COMPARISON OF MULTI-IMAGES DEEP LEARNING SUPER RESOLUTION FOR PASSIVE MICROWAVE IMAGES OF ARCTIC SEA ICE [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021
The observation of Arctic sea ice is of great significance to monitoring of the polar environment, research on global climate change and application of Arctic navigation.
X. Shen   +7 more
doaj   +1 more source

Characterizing natural variability in complex hydrological systems using passive microwave-based climate data records: a case study for the Okavango Delta [PDF]

open access: yesHydrology and Earth System Sciences, 2022
The Okavango River system in southern Africa is known for its strong interannual variability of hydrological conditions. Here, we present how this is exposed in surface soil moisture, land surface temperature, and vegetation optical depth as derived from
R. van der Schalie   +5 more
doaj   +1 more source

Research progress on retrieval algorithms of cloud liquid water over ocean based on remote sensing by satellite-borne passive microwave instruments

open access: yes暴雨灾害, 2021
Space-borne visible and infrared instruments can only observe the information of the cloud top or within a limited depth below the top due to their lack of ability to penetrate clouds, while space-borne passive microwave instruments can obtain cloud body
Yunfei FU
doaj   +1 more source

Microwave Passive Direction-Finding Method Based on NV Color Center in Diamond

open access: yesMicromachines, 2023
In this study, we established a passive direction-finding scheme based on microwave power measurement: Microwave intensity was detected using microwave-frequency proportion integration differentiation control and coherent population oscillation effect ...
Qi Wang   +4 more
doaj   +1 more source

Sea Ice Concentration Estimation: Using Passive Microwave and SAR Data With a U-Net and Curriculum Learning

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
Ice concentration estimates are typically acquired from algorithms using passive microwave satellite data, and from image analysis charts, but these have limitations. Estimates acquired from passive microwave data have coarse spatial resolution, may have
Keerthijan Radhakrishnan   +2 more
doaj   +1 more source

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