搜索结果: 1-15 共查到“水文学 Microwave”相关记录17条 . 查询时间(0.109 秒)
Developing an improved soil moisture dataset by blending passive and active microwave satellite-based retrievals
Developing an improved soil moisture active microwave retrievals
2011/3/14
Combining information derived from satellite-based passive and active microwave sensors has the potential to offer improved estimates of surface soil moisture at global scale. We develop and evaluate ...
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...
The Utilization of Spaceborne Microwave Radiometers for Monitoring Snowpack Properties
Utilization Spaceborne Microwave Radiometers Snowpack Properties
2009/10/29
Snow accumulation and depletion at specific locations can be monitored from
space by observing related variations in microwave brightness temperatures.
Using vertically and horizontally polarized br...
Prior microwave measurements of snow water equivalent and liquid water
content and conceptualizations of emission and backscattering models are
reviewed. The results of an experiment designed to col...
Measurement and Modeling of Microwave Emission from Forested Snowfields in Michigan
Measurement Modeling of Microwave Emission Forested Snowfields
2009/10/28
Forest cover was found to confuse the normally inverse relationship between
microwave brightness temperature (TrJ) and snow depth in dry snowpacks in
the lower peninsula of Michigan during February ...
Passive and Active Microwave Studies of Wet Snowpack Properties
Passive Active Microwave Studies Wet Snowpack Properties
2009/10/27
Microwave signatures have been found to, be related to variations in snow
conditions found on the earth's surface. Most of these observations have been
obtained by passive microwave radiometry. In g...
Microwave Remote Sensing of Snowpack Properties:Potential and Limitations
Microwave Remote Sensing Snowpack Properties Potential Limitations
2009/10/27
This review explores from a user's viewpoint the possibilities and limitations of
microwave-based techniques for the remote sensing of snowpack properties.
Mapping of dry snowpacks and detection of ...
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...
An Assessment of the Capabilities of the ERS Satellites' Active Microwave Instruments for Monitoring Soil Moisture Change
European Remote sensing Monitoring Soil Moisture Change active microwave instrument
2009/6/8
The launch of the European Remote sensing Satellite (ERS-1) in July 1991 represented an important turning point in the development of Earth observation as it was the first of a series of satellites wh...
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 ...
Soil moisture-runoff relation at the catchment scale as observed with coarse resolution microwave remote sensing
Soil moisture runoff relation catchment scale microwave remote sensing
2009/5/18
Microwave remote sensing offers emerging capabilities to monitor global hydrological processes. Instruments like the two dedicated soil moisture missions SMOS and HYDROS or the Advanced Scatterometer ...
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...