搜索结果: 1-15 共查到“理学 Passive Microwave”相关记录17条 . 查询时间(0.1 秒)
VALIDATION OF THE DAILY PASSIVE MICROWAVE SNOW DEPTH PRODUCTS OVER NORTHERN CHINA
Snow Depth Products Snow Cover Passive Microwave Validation Northern China
2018/5/15
Passive microwave sensors have the capability to provide information on snow depth (SD), which is critically important for hydrological modeling and water resource management. However, the different a...
Advances in Sea-Ice Research Based on Remotely Sensed Passive Microwave Data
Advances Sea-Ice Research Remotely Sensed Passive Microwave Data
2015/8/19
Sea-ice cover is the most significant feature of the polar ocean environment. Annual cycles of sea-ice cover and their interannual variations contribute significantly to changes in surface reflectivit...
Feasibility of Characterizing Snowpack and the Freeze–Thaw State of Underlying Soil Using Multifrequency Active/Passive Microwave Data
Freeze Characterizing Snowpack Freeze–Thaw State
2013/9/2
Abstract—An ensemble-based data assimilation approach isdeveloped to characterize the snow water equivalent (SWE)and underlying soil freeze–thaw tate (including the soil surfacetemperature and both so...
Monitoring freeze-up and break-up dates of Northern Hemisphere big lakes using passive microwave remote sensing data
Lake ice freeze-up date break-up date passive microwave brightness temperature
2013/9/2
Historic freeze-up and break-up dates of lakecan record the regional climate variability. Observations of lakeice from different regional or country's stations are inconsistent and their number was de...
Soil moisture active and passive microwave products:intercomparison and evaluation over a Sahelian site
Soil moisture active passive microwave products intercomparison evaluation Sahelian site
2010/2/1
This paper presents a comparison and an evaluation of five soil moisture products based on satellite-based passive and active microwave measurements. Products are evaluated for 2005–2006 against groun...
A study on retrieval algorithms in oceanic passive microwave remote sensing using 1.4 GHz and 10.7 GHz bands
polarimetric microwave radiometer sea-surface salinity remote sensing retrieval algorithm
2009/11/17
To retrieve sea-surface salinity (SSS) from radiometer data at 1.4 GHz, auxiliary data of sea-surface temperature (SST), surface roughness and meteorological variables are needed. The authors study oc...
Snow Cover of the Upper Colorado River Basin from Satellite Passive Microwave and Visual Imagery
Snow Cover Colorado River Basin Satellite Passive Microwave Visual Imagery
2009/10/27
A comparison of passive microwave images from the Nimbus-7 Scanning Multichannel
Microwave Radiometer (SMMR) and visual images from the Defense
Meteorological Satellite Program (DMSP) of the Upper C...
A Neural Network Approach to Inversion of Snow Water Equivalent from Passive Microwave Measurements
Neural Network Approach Snow Water Equivalent Passive Microwave Measurements
2009/10/26
The inversion of snow water equivalent, SWE, from passive microwave remote
sensing measurements may be accomplished by using a neural network trained
with a dense media multiple scattering model. Br...
The comparison of two models that determine the effects of a vegetation canopy on passive microwave emission
passive microwave emission vegetation canopy microwave brightness temperature
2009/5/26
Two contrasting models are used to account for the effects of vegetation on microwave emission from the soil. These are: a simple model which requires two empirically derived parameters as input data ...
Application of a coupled microwave, energy and water transfer model to relate passive microwave emission from bare soils to near-surface water content and evaporation
microwave emission near-surface water
2009/3/25
The paper examines the stability of the relation between microwave emission from the soil and the average near-surface water content in the case of relatively smooth, bare soils, and then considers th...
Using vegetation indices for soil-moisture retrievals from passive microwave radiometry
NDVI soil moisture passive microwave
2009/3/24
Surface soil moisture and the nature of the overlying vegetation both influence microwave emission from land surfaces significantly. One widely discussed but underused method for allowing for the effe...
A simple parameterisation for retrieving soil moisture from passive microwave data
passive microwave soil moisture
2009/3/23
MICRO-SWEAT, a physically based soil water and energy balance model coupled with a microwave emission model, was used to investigate the relationship between near surface soil moisture (θ0-5) and L-ba...
Application of a plane-stratified emission model to predict the effects of vegetation in passive microwave radiometry
passive microwave soil moisture vegetation
2009/3/17
This paper reports the application to vegetation canopies of a coherent model for the propagation of electromagnetic radiation through a stratified medium. The resulting multi-layer vegetation model i...
Antarctic summer sea ice concentration and extent:comparison of ODEN 2006 ship observations,satellite passive microwave and NIC sea ice charts
summer sea ice concentration ODEN 2006 ship observations satellite passive microwave NIC sea ice charts
2010/2/3
Antarctic sea ice cover has shown a slight increase (<1%/decade) in overall observed ice extent as derived from satellite mapping from 1979 to 2008, contrary to the decline observed in the Arctic regi...
Monitoring soil wetness variations by means of satellite passive microwave observations:the HYDROPTIMET study cases
soil wetness variations satellite passive microwave observations HYDROPTIMET
2009/12/28
Soil moisture is an important component of the hydrological cycle. In the framework of modern flood warning systems, the knowledge of soil moisture is crucial, due to the influence on the soil respons...