Results 41 to 50 of about 2,737 (182)

ADC Performance in Microwave Radiometer

Journal of Radio Electronics, 2023
The configuration of a microwave switched radiometer is considered. The grounds that guide developers in determining the requirements for the ADC sampling rate are analyzed. It is shown that the ADC rate can be significantly reduced if an additional analog integrator is installed at the ADC input. Statistical modeling of such a circuit has been carried
D.P. Skulachev, A.S. Kosov
openaire   +1 more source

Enabling Under Ice Glider Operations: A Backseat Driver Approach

Journal of Field Robotics, EarlyView.
ABSTRACT Polar Oceans are key locations for forcing global ocean circulation, influencing both global climate and biogeochemical cycles. Due to restricted access to these seasonally and perennially ice‐covered regions, these areas are severely undersampled.
Yaomei Wang, Benjamin Allsup, Georgios Salavasidis, Stephen Woodward, Adeniyi Adenaya, Mike Smart, Alexis Johnson, Felipe Marques Dos Santos, Jake Ludgate, Daniel Matterson, Alvaro Lorenzo, J. Alexander Brearley, Alexander Brian Phillips   +12 more
wiley   +1 more source

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

The EUMETSAT sea ice concentration climate data record [PDF]

The Cryosphere, 2016
An Arctic and Antarctic sea ice area and extent dataset has been generated by EUMETSAT's Ocean and Sea Ice Satellite Application Facility (OSISAF) using the record of microwave radiometer data from NASA's Nimbus 7 Scanning Multichannel Microwave ...
R. T. Tonboe, S. Eastwood, T. Lavergne, A. M. Sørensen, N. Rathmann, G. Dybkjær, L. T. Pedersen, J. L. Høyer, S. Kern   +8 more
doaj   +1 more source

The underappreciated roles of fog and dew on vegetation and biocrusts

New Phytologist, Volume 251, Issue 1, Page 46-63, July 2026.
Summary Fog and dew represent minor components of ecosystem water budgets in most ecosystems. However, fog and dew can play an essential role in ecosystem dynamics and are particularly important for water‐limited systems. In addition to serving as direct water inputs, fog and dew can influence microclimate and water redistribution, thereby promoting ...
Lixin Wang, Yue Li, Mengyun Sun, Na Qiao
wiley   +1 more source

Enhancing Photostability of All‐Inorganic Perovskites via Natural Antioxidant Passivation for High‐Performance Fluorescent Sensors

Small Structures, Volume 7, Issue 6, June 2026.
Natural lycopene is proposed to passivate the surface defects of all‐inorganic CsPbBr3, preventing ultaviolet (UV) light influence. Treated CsPbBr3 has a low defect level and exhibits excellent UV stability. Extension of this strategy to CsPb(Br0.5Cl0.5)3 enables the fabrication of a dual‐channel UV fluorescence sensor with good performance.
Ziyuan Xie, Chenyu Zeng, Xuanchi Yu, Zhihao Huang, Xuliang Feng, Yuhan Ji, Yuan Qiu, Xi Deng, Tianxiang Wang, Zijun Sun, Ruxue Li, Tingchao He, Rui Chen   +12 more
wiley   +1 more source

Use of Radiative Transfer Model for Inter-Satellite Microwave Radiometer Calibration

Remote Sensing
This paper describes the benefits of using a microwave radiative transfer model (RTM) to improve the inter-satellite radiometric calibration (XCAL) between two independent satellite microwave radiometers.
Patrick N. De La Llana, Faisal Bin Kashem, W. Linwood Jones   +2 more
doaj   +1 more source

A Global, Daily Carbon Budget for Terrestrial Ecosystems Constrained by Satellite Observations of Soil Moisture: The SMAP Level 4 Carbon Product at Ten Years

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 6, June 2026.
Abstract The capacity of terrestrial ecosystems to retain carbon or sequester more atmospheric carbon is frequently investigated as a potential natural climate solution. However, global carbon inventories, national carbon assessments, and atmospheric inversion studies suffer from key limitations: infrequent estimates, low spatial resolution, or a lack ...
K. Arthur Endsley, John S. Kimball, Rolf H. Reichle, Joseph V. Ardizzone, Tobias Kundig, Thomas Colligan, Jens Heinke, Etsushi Kato, Jürgen Knauer, Lei Ma, Tobias Nützel, Qing Sun, Wenping Yuan   +12 more
wiley   +1 more source

An integrated approach toward the incorporation of clouds in the temperature retrievals from microwave measurements [PDF]

Atmospheric Measurement Techniques, 2014
In this paper, we address the characterization of clouds and its inclusion in microwave retrievals in order to study its effect on tropospheric temperature profiles measured by TEMPERA radiometer.
F. Navas-Guzmán, O. Stähli, N. Kämpfer   +2 more
doaj   +1 more source

Improving Global Surface Soil Moisture Prediction Through Physics‐Guided Deep Learning and Cluster‐Based Regionalization

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.
Abstract Surface soil moisture (SSM) is essential to the hydrological cycle and land–atmosphere interactions, and its accurate simulation is crucial for climate prediction and resource management. This study developed an innovative modeling framework for global SSM prediction by integrating physics‐guided deep learning (PGDL) and clustering‐based ...
Xuan Xi, Qianlai Zhuang
wiley   +1 more source