Results 81 to 90 of about 578,586 (234)

Self-balancing microwave comparison radiometer

Electronics Letters, 1965
A 3cm radiometer evolved from Allred's 3 Mc/s system is described. The sum and difference of the voltages from an aerial and a controllable noise source are formed in a magic-T hybrid and correlated. The correlator output, which is zero only for equal aerial and reference powers, is used to adjust the reference to equality.
H.S. Oranc, E.D.R. Shearman
openaire   +1 more source

Evaluating Evapotranspiration Simulation Performance in 30 Conceptual Hydrological Models: Insights Into ET Representation Across Diverse Climates

Water Resources Research, Volume 62, Issue 3, March 2026.
Abstract Existing comparative studies on conceptual hydrological model structures have generally focused on streamflow, with less attention to evapotranspiration (ET). Yet, appropriate ET representation in conceptual models is crucial for obtaining reliable hydrological simulations, especially under climate change and in ungauged basins.
Shuyue Wu, Yuting Yang, Changming Li, Wenjing Yang, Jianshi Zhao   +4 more
wiley   +1 more source

Observation‐Constrained Physical Snow Water Equivalent Simulations Using a Physics‐Guided Machine Learning Approach

Water Resources Research, Volume 62, Issue 3, March 2026.
Abstract Estimating daily snow water equivalent (SWE) is critical for hydrological and climate applications, yet physical models often struggle to represent SWE, especially its interannual anomalies. In this study, we developed a hybrid physics‐guided machine learning (ML) model (hybrid model), by augmenting the Community Land Model 4.0 SWE simulations
Wenli Zhao, Jianing Fang, Tao Yang, Xu Lian, Alexander J. Winkler, Fubao Sun, Pierre Gentine   +6 more
wiley   +1 more source

Lunar heat flow from the observation of Chinese Chang’E 2 and LRO diviner radiometers

AIP Advances
Lunar heat flow within 75°N to 65°S and 60°W to 100°E regions is retrieved from microwave brightness temperature observed by Chang’E-2 (CE-2) Lunar Microwave Radiometers and infrared brightness temperature observed by Lunar Reconnaissance Orbiter (LRO ...
Dan Zhang, Cui Li
doaj   +1 more source

Intercomparison of integrated water vapour measurements

Meteorologische Zeitschrift, 2006
Measurements of tropospheric integrated water vapour (IWV) made with two microwave radiometers (ASMUWARA, TP/WVP-3000), GPS, and radiosondes (SRS 400) during the Temperature, hUmidity, and Cloud (TUC) profiling campaign under mid-latitude conditions in ...
Lorenz Martin, Christian Mätzler, Tim J. Hewison, Dominique Ruffieux   +3 more
doaj   +1 more source

Microwave remote sensing of water vapor in the atmosphere [PDF]

Geographica Helvetica
Water vapor in the atmosphere plays a crucial role in climate and in atmospheric processes. Due to its long chemical lifetime it can be used as a tracer for investigations of dynamical processes in the middle atmosphere.
N. Kämpfer, B. Deuber, D. Feist, D. Gerber, C. Mätzler, L. Martin, J. Morland, V. Vasic   +7 more
doaj   +1 more source

Soil Moisture Buffers the Impact of Precipitation Variability on Ecosystem Productivity

Water Resources Research, Volume 62, Issue 3, March 2026.
Abstract Water availability governs ecosystem productivity, yet estimates of vegetation sensitivity to water can differ greatly depending on whether the sensitivity is examined spatially or temporally. In particular, the spatial sensitivity is often reported to be much stronger than temporal sensitivities, leading to highly uncertain projections of ...
Huiqi Wang, Maoya Bassiouni, Yanghui Kang, Sami W. Rifai, Laureano A. Gherardi, Anna Ukkola, Trevor F. Keenan   +6 more
wiley   +1 more source

Normality Analysis for RFI Detection in Microwave Radiometry

Remote Sensing, 2009
Radio-frequency interference (RFI) present in microwave radiometry measurements leads to erroneous radiometric results. Sources of RFI include spurious signals and harmonics from lower frequency bands, spread-spectrum signals overlapping the “protected ...
Adriano Camps, Jose Miguel Tarongi
doaj   +1 more source

Satellite‐Based Estimation of Near‐Surface Specific Humidity During Tropical Cyclones in the Western North Pacific and North Atlantic

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract The near‐surface specific humidity is critical for accurately estimating the enthalpy flux from the ocean, which plays an important role in tropical cyclone intensification. However, under the severe oceanic and atmospheric conditions of these storms, even spaceborne microwave radiometers struggle to retrieve reliable humidity data.
Hiroyuki Tomita, Akiyoshi Wada
wiley   +1 more source

2025 California Wildfire Observations Using Single Field‐of‐View Sounder Atmospheric Products (SiFSAP)

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 4, 28 February 2026.
Abstract Southern California wildfires result in a significant loss for Los Angeles and San Diego County from January 7 to 31, 2025. Palisades Fire and Eaton fires, the two largest fires that caused most of that damage, were observed by the infrared sounder CrIS and microwave sounder ATMS aboard a polar‐orbit satellite of the National Oceanic and ...
Liqiao Lei, Xu Liu, Wan Wu, Xiaozhen Xiong, Qiguang Yang, Allen M. Larar   +5 more
wiley   +1 more source