Results 81 to 90 of about 52,470 (303)

Coupled observation‐operator approximations in outer‐loop coupling data assimilation

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We present a methodology for coupled variational data assimilation that allows the effect of coupled observation operators whilst maintaining separate minimisations across model components. This allows us to constrain the atmosphere, ocean, and sea‐ice components of our coupled model directly from satellite radiances. We illustrate the system in action
P. A. Browne, P. de Rosnay, A. J. Geer, S. Quesada‐Ruiz, T. Scanlon, E. Villeneuve   +5 more
wiley   +1 more source

Evaluation and assimilation of Arctic Weather Satellite data in the AROME‐Arctic forecast system

Quarterly Journal of the Royal Meteorological Society, EarlyView.
The Arctic Weather Satellite (AWS), launched in August 2024, is a prototype for the future EPS–Sterna constellation of small satellites carrying an innovative microwave sounder. We present the first assessment of AWS in the regional AROME‐Arctic numerical weather prediction system, covering post‐launch calibration results and the impact of AWS ...
Stéphanie Guedj, Per Dahlgren, Máté Mile   +2 more
wiley   +1 more source

Bipolarization L-band microwave radiometer

, 2019
A new bipolarization L-band microwave radiometer designed to measure soil moisture from an unmanned helicopter is presented. The schematic of the radiometer and an overview of the radiometer parts circuits are considering.
Leushin V., Sidorov I., Agasieva S., Gudkov A.   +3 more
core   +2 more sources

Ultraviolet radiation radiometer “Tenzor-31”

Технологія та конструювання в електронній апаратурі, 2006
A radiometer for measuring the irradiance in the UV range, “Tenzor-31,” has been developed in full compliance with regulatory requirements. A distinctive feature of the proposed UV radiometer is the use of a two-channel optical signal processing scheme ...
V. K. Butenko, V. G. Yurev, Yu. G. Dobrovolskiy, B. G. Shabashkevich   +3 more
doaj  

Insights From the Alphasat Aldo Paraboni Experiment at Tito Scalo and Spino d'Adda: Characterizing Scintillation and Rain Attenuation at Ka‐ and Q‐Band Frequencies

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT We present experimental results on the relationship between rain attenuation and simultaneous scintillation during rain events, based on beacon signal measurements at 19.7 (Ka‐band) and 39.4 GHz (Q‐band) from the geosynchronous Alphasat satellite (25° E), received at two Italian ground stations, Spino d'Adda (42.1° slant path) and Tito Scalo ...
Miles Turner, Alef Comisso, Carlo Riva, Lorenzo Luini, Giuseppe Codispoti, Giorgia Parca   +5 more
wiley   +1 more source

Ultraviolet radiometer in the 300–400 nm range

Технологія та конструювання в електронній апаратурі, 2004
The design and characteristics of a newly developed UV radiometer for the 300–400 nm spectral range with a spectral sensitivity non-uniformity of no more than 5% are presented.
A. A. Ashcheulov, V. K. Butenko, I. V. Doktorovich, A. Kh. Dunayenko, V. D. Photiy   +4 more
doaj  

Directive Antenna Clutter Loss in Slant Paths

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT This paper investigates the development of a clutter loss model specifically for slant paths involving directive antennas. Conventionally, clutter loss is characterized by using isotropic antennas to facilitate standard link budget calculations via single antenna gain values.
Fernando Pérez Fontán, Vicente Pastoriza‐Santos, Fernando Machado Domı́nguez, Thomas Prechtl, Pavel Pechac   +4 more
wiley   +1 more source

Multifrequency microwave thermograph for biomedical applications

Journal of Telecommunications and Information Technology, 2004
This paper presents problems related to thermal radiation of human bodies in microwave range in aspect of diagnosis of breast carcinoma. A mathematical model of thermal radiation transfer through tissues is introduced and methods of measurement of ...
Bronisław Stec
doaj   +1 more source

Inflammatory Shift in Chronic Rhinosinusitis Amidst Guangzhou's Urbanization (2000–2018)

World Journal of Otorhinolaryngology - Head and Neck Surgery, EarlyView.
ABSTRACT Background Chronic rhinosinusitis (CRS) exhibits temporal and geographic diversity in pathological endotypes with progressive eosinophilic infiltration, while the underlying causes remain unclear. Current pathological endotypes determination relies on mean cell count per high‐power field, requiring accuracy optimization.
Ning Kang, Man‐Hou Chao, Xin Luo, Feng‐Wen Shan, Zi‐Xuan Hua, Ze‐Zhi Guo, Hua‐Mei Yan, He Zhang, Tong Wu, Min Zhou, Rui Zheng, Shuo Wu, Xue‐Kun Huang, Zhao‐Hui Shi, Ya‐Na Zhang, Ji Yang, Qin‐Tai Yang   +16 more
wiley   +1 more source

Fracture load and three‐dimensional internal void analysis of direct composites used to restore worn molars

European Journal of Oral Sciences, EarlyView.
Abstract This study evaluated (1) the load‐bearing capacity of molars restored with direct occlusal veneers fabricated either from short‐fiber‐reinforced composite (SFRC) or particulate‐filled composite (PFC) and the presence of internal voids within the materials, and (2) effect of water storage on the fracture load and correlation between internal ...
Topias Yli‐Urpo, Jorma Määttä, Auli Suominen, Pekka K. Vallittu, Timo Närhi, Anna‐Maria Le Bell‐Rönnlöf, Jasmina Bijelic‐Donova   +6 more
wiley   +1 more source