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Error source analyses are critical for the satellite-retrieved surface net longwave radiation products. In this study, we evaluate the error sources of the Clouds and the Earth's Radiant Energy System (CERES) project Single Scanner Footprint (SSF) net longwave radiation (NLW) product (monthly mean, 1° equal area) at 11 sites from July 2000 to December 2007 in China. Results show that cloud fraction,...
Spatial heterogeneity is a universal phenomenon that exits in ecological systems. In addition, it is one structural feature of ecological systems. Hence, quantification of spatial heterogeneity can examine structure of ecological systems. The Wenchuan earthquake triggered cascading disasters of landslides and debris flows that caused severe vegetation damage. Besides detecting the change, the magnitude...
Desertification is a severe issue that has received increasing attention currently. This paper aims at the desertification degree assessment and trend analysis between 2000 and 2014. Firstly, based on the negative correlation between albedo and Normalized Difference Vegetation Index (NDVI), desertification difference index (DDI) products are completed, which are applied to assess desertification degree...
GCOM-C SGLI land products are being developed toward better understandings of terrestrial carbon cycle and future climate change projection. In this paper, we will introduce two research products, Leaf Area Index (LAI) and Net Primary Productivity (NPP) and their application of these products to earth system models (ESMs). The LAI product as research product is an improved version from standard product...
In March, 2016 we first completed the global data processing of digital surface models (DSMs) by using the whole archives of stereo images derived from the Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM) onboard the Advanced Land Observing Satellite (ALOS). The dataset has unprecedented 5 m grid spacing utilizing the original stereo images in 2.5 m resolution while its target accuracy...
Satellite remote sensing provides a means of quantifying water budget variables over regions where in-situ measurements are scarce. This paper investigates the use of remote sensing products and WGHM (WaterGAP Global Hydrological Model) on water budget closure in Cyprus (35N-33W). The remote sensing products relate the terrestrial water storage change (ΔS) derived from Gravity Recovery and Climate...
We demonstrate the complementarity of a multitude of satellite flood maps and large-scale flood inundation modeling. We employ a unique set of maps, from both optical and radar imagery, that were delivered to emergency responders during the Texas flood disaster of late May, early June 2015. Specifically, for this study, a two-dimensional hydrodynamic model was built to simulate the best possible inundation...
The rapid growth in global sensor networks is leading to an explosion in the volume, velocity and variety of geospatial and geoscientific data. This coupled with the increasing integration of geospatial data into our everyday lives is also driving an increasing expectation of spatial information on-demand, and with minimal delay. The challenge we face in meeting these expectations is how to convert...
IoT, EO and the Web are providing ever increasing amounts of geospatial information. In order to access and integrate the data using geospatial and temporal methods, standards are needed. This paper provides a summary of current capabilities and recent advancements in standards from the Open Geospatial Consortium (OGC) that provide these capabilities.
Surface soil moisture products generated by recent L-band radiometer missions have significant potential for enhancing hydrologic stream flow prediction. Here, we objectively evaluate this potential using data sets generated by both the ESA SMOS and NASA SMAP satellite missions. Evaluation is based on their ability to improve the representation of both 1) pre-storm antecedent soil moisture conditions...
Groundwater Arsenic (As) contamination in three groundwater tables (Holocene (qh), Pleistocene (qp2–3), and Pleistocene (qp1)) was examined by using 300, 423, and 204 samples in qh, qp2–3, and qp1, respectively, in Hanoi City in 2000–2003. Land subsidence was derived from JERS-1 images in 1995–1998, and Envisat-ASAR from Jan to April in 2004. Results show that Arsenic was lower in surface water and...
The San Francisco Bay Area is home to over 7 million people, the fifth largest population center in the United States. This region also supports one of the most prosperous economies in the U.S. A recent report by the State of California's Department of Water Resources has emphasized that the Bay Area is at risk of catastrophic flooding [1]. Monitoring heavy rainfall events and mitigation of their...
River interventions disturb the natural flow regime of channel. The impacts generated from river interventions is categorized based on the alteration of fluvial system including channel planform and ecology. The Brahmani River, one of the major peninsular river holds a significant importance for three major states of eastern India. This river has been subjected to periodic flooding events damaging...
Spatial co-location pattern mining is employed to identify a group of spatial types, the instances of which are frequently located in spatial proximity. Current co-location mining methods have two limitations: (1) it is difficult to set an appropriate proximity threshold to identify close instances in an unknown region and (2) those methods neglect the effects of distance values between instances...
Integrated environmental modelling (IEM) couples interdependent environmental models and data together to solve complex environmental problems. There are two major modelling frameworks for IEM: component based framework, and service oriented framework. This paper suggests to take the best of both to couple modelling components and services together. The result is a hybrid method to leverage Open Modelling...
Ground displacements that cause structural damage to heritage buildings are precipitating cultural and economic value losses. The GEPATAR project (GEotechnical and Patrimonial Archives Toolbox for ARchitectural conservation in Belgium) aims creating an online interactive geoinformation tool that allows the user to view and to be informed about the Belgian heritage buildings at risk due to differential...
This paper addresses the results of the instrument and product performance verification, radiometric and geometric calibration achieved since the end of the respective Sentinel-1 A and B commissioning phases.
The two-satellite Copernicus Sentinel-1 (S1) constellation became operational in Sep 2016, with the successful in-orbit commissioning of the S1B unit. During, the commissioning phase and early operational phase it has been confirmed that the interferometric performance of the constellation is excellent, with no observed phase anomalies. In this work, we show an analysis of selected performance parameters...
The Internet of Things is about to increase the existing data deluge even further. Standards help to unleash data and services through a well-defined, interoperable manner. In this paper we characterize the role and interplay of two OGC standards suites addressing sensors and “Big Data”, thereby illustrating how both concepts can be merged in services.
The contribution focuses on the current status of the ESA study entitled “InSARAP Sentinel-1 Constellation Study”, which investigates the interferometric performance of the S1A/S1B units. General aspects like the interferometric compatibility in terms of common range and Doppler bandwidth and the burst synchronization are addressed. Besides the first interferometric results with both units, time series...
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