In this study, the Visible Infrared Imager Radiometer Suite (VIIRS) land surface temperature (LST) environmental data record (EDR) and Moderate Resolution Imaging Spectroradiometer (MODIS) L2 swath LST products (collection 5) from both Terra Aqua satellites were evaluated against ground observations in an arid area of northwest China during Heihe Watershed Allied Telemetry Experimental Research (HiWATER) experiment. Four barren sites chosen for evaluation, which took place June 2012 to April...

In this study, to improve the accuracy of land surface temperature (LST) products over barren surfaces, we present an operational algorithm retrieve LST from Moderate-Resolution Imaging Spectroradiometer (MODIS) thermal infrared data using physically retrieved emissivity products. The involved two steps. First, in MODIS split-window (SW) channels was estimated vegetation cover method, with bare soil component derived ASTER global set. Then, a modified generalized SW algorithm. This...

In this paper, two atmospheric profile sources were assessed for land surface temperature (LST) retrieval purposes the HJ-1B IRS (Infrared Scanner) single-channel thermal infrared (TIR) data. One source is National Center Environmental Prediction (NCEP) operational global analysis data, and other Moderate Resolution Imaging Spectroradiometer (MODIS) profiles product (MOD07). The used as input to MODTRAN 4 radiative transfer model calculate parameters involved in LST retrieval. retrievals...

Land surface component temperatures are important inputs in longwave radiation and evapotranspiration estimation models. Most temperature inversion approaches focus only on two components, namely, soil leaves, because space-based multiangle observations lacking. This approach is inconsistent with ground-based measurements, which suggest that the of sunlit shaded may significantly differ. paper explores a three-component scheme uses airborne thermal infrared to decrease difference between...

Land surface emissivity (LSE) is a key parameter for the determination of land temperature (LST) from thermal remotely sensed data. A new LSE product has been developed at National Oceanic and Atmospheric Administration (NOAA), College Park, MD, USA, to enhance LST Joint Polar Satellite System (JPSS) Geostationary Operational Environmental R-Series (GOES-R) missions as well support forecasting models. 1-km resolution bare ground was derived historical Advanced Spaceborne Thermal Emission...

Satellite land surface temperatures (LSTs) have been routinely produced for decades from a variety of polar-orbiting and geostationary satellites, which makes it possible to generate LST climate data globally. However, consistency the satellite LSTs different missions is concern such purpose; an enterprise algorithm desired production through missions, or at least, series satellites mission. The employs split window technique uses emissivity explicitly in its formula. This research focuses...

This paper uses the refined Generalized Split-Window (GSW) algorithm to derive land surface temperature (LST) from data acquired by Visible and Infrared Radiometer on FengYun 3B (FY-3B/VIRR). The coefficients in GSW corresponding a series of overlapping ranges for mean emissivity, atmospheric Water Vapor Content (WVC), LST are derived using statistical regression method numerical values simulated with an accurate radiative transfer model MODTRAN 4 over wide range conditions. is applied...

High spatial resolution airborne data with little sub-pixel heterogeneity were used to evaluate the suitability of temperature/vegetation (Ts/VI) space method developed from satellite observations, and explored improve performance Ts/VI for estimating soil moisture (SM). An evaluation ΔTs/Fr (incorporated air temperature) revealed that normalized difference vegetation index (NDVI) saturation disturbed pixels hindering appropriate construction space. The non-disturbed space, which was...

Land surface temperature (LST) is required for a wide variety of scientific studies, from climatology to hydrology and ecology. This paper proposes single-channel parametric model (SC-PM) algorithm retrieving land the HJ-1B/IRS thermal infrared data. The SC-PM based on (PM) developed by Ellicott et al. (2009), coefficients PM are updated HJ-1B/IRS, altitude considered when extracting atmospheric profile NCEP proposed evaluated simulated data MODIS LST products. results show an root mean...

This paper proposed a modified TES algorithm for retrieving land surface temperature and emissivity (LST&E) from Thermal Airborne Spectrographic Imager (TASI) hyperspectral data the results were validated with in situ ground measurements. Firstly, atmospheric correction of TASI was performed by MODTRAN model profile extracted NCEP which local meteorological data. Then, S-G filter used to smooth spectral order reduce noise effect Finally, Temperature Emissivity Separation (TES) LST&E The...

This study investigates the effects of soil moisture (SM) on land surface emissivity (LSE) using Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) LSE data acquired in Heihe Watershed Allied Telemetry Experimental Research (HiWATER). Three bare sites with automatic meteorological stations that collected long-term SM were chosen to evaluate impact. The ASTER retrieval was performed water vapor scaling method improve atmospheric correction results, validation results...

A new geometric optical model is proposed in this letter to simulate the directional brightness temperature (DBT) distribution over mixed scenes of continuous crop and road. The DBT distributions road zones are separately calculated, zone consists a adjacent sides. polar map designed show all roads different lengths, widths, orientations scene. airborne multiangle data set thermal infrared band that was acquired during Heihe Watershed Allied Telemetry Experimental Research experiment used...

Traditional methods for studying surface water and groundwater interactions have usually been limited to point measurements, such as geochemical sampling seepage measurement. A new methodology is presented quantifying discharge a river, by using river temperature data obtained from airborne thermal infrared remote sensing technology. The Hot Spot Analysis toolkit in ArcGIS was used calculate the percentage of relative total flow river. This evaluated midstream Heihe River arid semiarid...

Land surface temperature and emissivity (LST&E) are key variables for a wide variety of surface-atmosphere studies, it is very important to validate the accuracy different LST&E retrieval algorithms. In this paper, Advanced Spaceborne Thermal Emission Reflection (ASTER) separation (TES) algorithm with water vapor scaling (WVS) method ASTER standard LSE&E products (without WVS) was validated using 12 scenes from May 2012 September concurrent ground LST measurements collected in an arid area...

This study analyzed the scaling problem of land surface temperature (LST) data retrieved with Temperature Emissivity Separation (TES) algorithm. We compiled a remotely sensed dataset that included Thermal Airborne Hyperspectral Imager (TASI) and satellite-based Advanced Spaceborne Emission Reflection (ASTER) data, which were acquired simultaneously. provided range spatial heterogeneities necessary for study, was quantified by dispersion variance. The LST studied comparing products in two...

The land surface albedo product of visible infrared imaging radiometer suite (VIIRS) in National Oceanic and Atmospheric Administration (NOAA)'s operational system provides real-time, global daily mean albedo, which is a required parameter the estimation shortwave net radiation budget. gridded VIIRS derived from level-2 granule product, generated using Direct Estimation Method. Special gridding compositing algorithms were developed for aggregating granular data into product. This paper...

To obtain more details about the fluid field and high stability of dry gas seal, according to Reynolds equation compressible perfect gas, on isothermal condition, controlling between T-shape groove seal faces is established, converted into a non-dimensional equation. The flow capacity reached with computer simulation in Fluent software, basis numerical simulation, working parameters (such as, rotating speed, pressure, viscosity medium, etc.) geometric number, deep, width ratio, balance...

For more details about gas flow field of spiral grooved dry seals, the numerical simulation face filed under different clearances is carried out, based on Navier Stokes equation, laminar model and SIMPLEC algorithm. The distribution film pressure variety opening force are investigated emphatically. result shows, there's clearly change at intersection groove land. At position hydrodynamic formed, into, negative (relatively) zone formed. Hydrodynamic weakens rapidly as clearance increased...

In order to know thoroughly the thermal deformation characters of T-shape groove dry gas seal under stable state in synthesis compressor, physical model pair and mathematical are established on its structural analysis. Based thermo-elastic theory finite element analysis software ANSYS, numerical method separation applied resolve analyze thermal-structural coupling pair, effective length is gained. The analyzed results show that stationary ring negative conicity, rotating positive later major...

The Visible Infrared Imaging Radiometer Suite (VIIRS) Land Surface Temperature (LST) has been operationally produced for a decade since the Suomi National Polar-orbiting Partnership (SNPP) launched in October 2011. A comprehensive evaluation of its accuracy and precision will be helpful product users climate studies atmospheric models. In this study, VIIRS LST is validated with ground observations from multiple high-quality radiation networks, including six stations Radiation budget...

According to the principle of hydromechanics, flow characteristic drilling fluid on screen is studied. In consideration affecting factors, sieving model equations including kinematic and continuity equation for shale shaker are established. This paper shows a novel solution by using average energy finite differential method. The computer simulation program capacity developed. will be great significance in evaluating screening performance selection. DOI: ...

For better geometric parameters of spiral grooved dry gas seals, the numerical simulation is carried out, based on Navier-Stokes (N-S) equation, laminar model and SIMPLEC algorithm. Five are investigated emphatically, use one by optimize method, take opening force, leakage, film stiffness ratio leakage as assessing target. Finally, optimized gained, a comparison between original put forward. The result shows, when h less than 4 mum, value K K/Q have considerable relative increment,...