NDLI: High-resolution change estimation of soil moisture using L-band radiometer and Radar observations made during the SMEX02 experiments

Content Provider	IEEE Xplore Digital Library
Author	Narayan, U. Lakshmi, V. Jackson, T.J.
Copyright Year	1980
Abstract	The soil moisture experiments held during June-July 2002 (SMEX02) at Iowa demonstrated the potential of the L-band radiometer (PALS) in estimation of near surface soil moisture under dense vegetation canopy conditions. The L-band radar was also shown to be sensitive to near surface soil moisture. However, the spatial resolution of a typical satellite L-band radiometer is of the order of tens of kilometers, which is not sufficient to serve the full range of science needs for land surface hydrology and weather modeling applications. Disaggregation schemes for deriving subpixel estimates of soil moisture from radiometer data using higher resolution radar observations may provide the means for making available global soil moisture observations at a much finer scale. This paper presents a simple approach for estimation of change in soil moisture at a higher (radar) spatial resolution by combining L-band copolarized radar backscattering coefficients and L-band radiometric brightness temperatures. Sensitivity of AIRSAR L-band copolarized channels has been demonstrated by comparison with in situ soil moisture measurements as well as PALS brightness temperatures. The change estimation algorithm has been applied to coincident PALS and AIRSAR datasets acquired during the SMEX02 campaign. Using AIRSAR data aggregated to a 100-m resolution, PALS radiometer estimates of soil moisture change at a 400-m resolution have been disaggregated to 100-m resolution. The effect of surface roughness variability on the change estimation algorithm has been explained using integral equation model (IEM) simulations. A simulation experiment using synthetic data has been performed to analyze the performance of the algorithm over a region undergoing gradual wetting and dry down.
Sponsorship	IEEE Geoscience and Remote Sensing Society IEEE URSI
Starting Page	1545
Ending Page	1554
Page Count	10
File Size	544925
File Format	PDF
ISSN	01962892
Volume Number	44
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Soil moisture L-band Radiometry Spaceborne radar Spatial resolution Surface soil Land surface Brightness temperature Vegetation Satellite broadcasting moisture change Hydrology microwave measurements
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Parameter sensitivity of soil moisture retrievals from airborne C- and X-band radiometer measurements in SMEX02

A method for retrieving high-resolution surface soil moisture from hydros L-band radiometer and Radar observations

Parameter sensitivity of soil moisture retrievals from airborne L-band radiometer measurements in SMEX02

Soil Moisture Retrievals From the WindSat Spaceborne Polarimetric Microwave Radiometer

Sensitivity of Passive Microwave Observations to Soil Moisture and Vegetation Water Content: L-Band to W-Band

Multiple resolution analysis of L-band brightness temperature for soil moisture

Combined Passive and Active Microwave Observations of Soil Moisture During CLASIC

Soil Moisture Retrieval Using a Two-Dimensional L-Band Synthetic Aperture Radiometer in a Semiarid Environment

FOSMEX: Forest Soil Moisture Experiments With Microwave Radiometry

High-resolution change estimation of soil moisture using L-band radiometer and Radar observations made during the SMEX02 experiments

Similar Documents

Parameter sensitivity of soil moisture retrievals from airborne C- and X-band radiometer measurements in SMEX02

A method for retrieving high-resolution surface soil moisture from hydros L-band radiometer and Radar observations

Parameter sensitivity of soil moisture retrievals from airborne L-band radiometer measurements in SMEX02

Soil Moisture Retrievals From the WindSat Spaceborne Polarimetric Microwave Radiometer

Sensitivity of Passive Microwave Observations to Soil Moisture and Vegetation Water Content: L-Band to W-Band

Multiple resolution analysis of L-band brightness temperature for soil moisture

Combined Passive and Active Microwave Observations of Soil Moisture During CLASIC

Soil Moisture Retrieval Using a Two-Dimensional L-Band Synthetic Aperture Radiometer in a Semiarid Environment

FOSMEX: Forest Soil Moisture Experiments With Microwave Radiometry

High-resolution change estimation of soil moisture using L-band radiometer and Radar observations made during the SMEX02 experiments