The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a processing chain to combine a CosmoSkyMed (CSK) image and a TerraSAR-X (TSX) image. After registration and calibration steps, processing at different levels is studied: pixel level for the detection of stable features and joint filtering, primitive level for stability analysis and object level (like roads) for joint interpretation.
High resolution panchromatic (Pan) and multispectral (MS) images from modern satellites have been increasingly used in remote sensing applications. Many pan-sharpening algorithms have been adopted by commercial remote sensing and GIS software packages. However, discrepant pan-sharpening results have been reported by different papers using different fusion techniques and images. There is a lack of...
This paper proposes a method on detecting specific type of collapsed built-up structures using only post-event images. Its essence lies in fusing morphological texture and spectral information through a nonlinear function to characterize debris of collapsed built-up structures. Experiments are carried out on an image after the 2010 Yushu earthquake. Results show that the method can well extract collapsed...
Numerous studies demonstrated the potential of interferometric coherence for forest stem volume estimation in boreal forests. Coherence derived from winter images acquired at frozen conditions proved being favourable against unfrozen conditions. This also applies to PALSAR coherence, although featuring relatively large temporal baseline of at least 46 days. However, when using data acquired at unfrozen...
Monitoring global vegetation can be of importance in understanding land surface processes and their interactions with the atmosphere, biogeochemical cycle, and primary productivity. Previous research has shown that vegetation indices have become essential tools in this field. In this study, we will explore and demonstrate a new technique for deriving Microwave Vegetation Indices (MVIs) using the passive...
Vegetation indices are indicators for analyzing the properties of vegetation. The Normalized Difference Vegetation Index (NDVI) from optical remote sensing data is one of the most commonly used vegetation indices, which can exhibit the ecological characteristics of leafy materials, but lacks the ability to directly provide information on the woody materials. In this paper, we developed Microwave Vegetation...
ET plays an important role in the energy exchange mass transfer between the hydrosphere, atmosphere and biosphere. ET is a critical variable in hydrological modeling and provides important boundary conditions for weather prediction. Environment and Disasters Monitoring Microsatellite Constellation of A and B star (HJ-1A/B), which was developed by China, has high space and temporary resolution and...
The Micro-sized Microwave Atmospheric Satellite (MicroMAS) is a 3U cubesat (34×10×10 cm, 4.5 kg) hosting a passive microwave spectrometer operating near the 118.75-GHz oxygen absorption line. The focus of the first MicroMAS mission (hereafter, MicroMAS-1) is to observe convective thunderstorms, tropical cyclones, and hurricanes from a near-equatorial orbit at approximately 500-km altitude. A MicroMAS...
In this paper we discuss a preliminary design for a constellation of geosynchronous (GEO) Synthetic Aperture Radars (SAR). The key design concept is to employ one or more pairs of closely-spaced twin receivers flown onboard GEO minisatellites moving with a velocity of few meters per second with respect to the Earth's surface, so as to form a synthetic aperture on the order of few tenths of kilometers...
The Cyclone Global Navigation Satellite System (CYGNSS) is a spaceborne mission concept focused on tropical cyclone (TC) inner core process studies. CYGNSS attempts to resolve the principle deficiencies with current TC intensity forecasts, which lies in inadequate observations and modeling of the inner core. CYGNSS consists of 8 GPS bistatic radar receivers deployed on separate nanosatellites. The...
The TerraSAR-X2 Mission is intended to insure the TerraSAR-X service continuity from 2016 onwards and to provide new very high resolution products with improved performance parameters to the user community. The TerraSAR-X2 Mission will benefit from an advanced SAR sensor technology allowing a spatial resolution down to 0.25 meter depending on selected and allowable chirp bandwidth in the future. Besides...
ADEOS II was launched on Dec., 2002. However, after about 10 months operation, it has lost most of its power due to the solar paddle failure. As a follow on of ADEOS II mission, JAXA is now planning GCOM mission which is composed of a series of satellites. They are now called GCOM-W and GCOM-C satellites. Both satellites are composed of 3 satellites with 5 year lifetime. Hence, 13 years of continuous...
Observation of active fires enables the estimation of trace gas and aerosol emissions, and can support fire management, air pollution monitoring and forecasting, and reporting efforts under international conventions. Here we present a mission concept for a dedicated Fire Monitoring Constellation (FMC) of small satellites based on experience from the BIRD mission (2001 – 2004), as well as the upcoming...
This paper shows the new small optical sensor satellite “ASNARO” and series of small earth observation satellites. ASANRO is developed by NEC under the contract with the Japanese government and its launch is planned this December. This satellite is 500 kg class small size satellite with 0.5 m resolution optical sensor. In addition, we plan the development of small earth observation satellites with...
A DART based data processing chain was developed for assessing the potential of a high spatial resolution geostationary satellite. It simulates time series of TOA and BOA radiance values and their spatial variability at any satellite spatial resolution, for any experimental, instrumental and view configuration (e.g., geosynchronous orbit). Account of sources of noise (e.g., atmosphere, sensor, anisotropy...
In this paper, the status and progress of the scatterometer (SCAT) of the Chinese-French Oceanography Satellite (CFOSAT) will be reported. SCAT/CFOSAT will be the first rotating fan-beam scatterometer (RFSCAT) ever flown on a satellite for global ocean vector wind measurement. The mission schedule, some design and development status and simulation results of its performances will be presented. The...
The quality of Synthetic Aperture Radar image is affected by the deviation of radar platforms from the nominal straight line which is usually measured based on hardware such as Inertial Measurement Unit and Global Position System with high accuracy. Because of limited budget, many SAR systems cannot carry those expensive equipments. Based on the 3-D Geometry model of the motion error analysis, a new...
In order to detect and imaging the moving boat monitoring ships from the dynamic ocean surface correctly in the image of Synthetic Aperture Radar, a novel approach based on fractional Fourier Transform with the Dual Receive Antenna SAR data was introduced. The traditional method of motion parameters estimation and focusing was modified, and the processing and analysis to improve the performance of...
This paper describes a sliding windows assimilation method, that allows estimating motion on long temporal image sequences, thanks to data assimilation techniques. The method splits the initial temporal window in sub-windows, on which reduced models are computed that allow to process images in quasi-real time. The method is quantified with twin experiments to demonstrate its potential for processing...
This paper proposes a way of improvement of the ML texture tracking method using bootstrap sampling. A quality factor is introduced to measure the accuracy of estimation. It is based on both statistics and image processing. The bootstrap sampling uses the inital information for generating additionnal samples in order to enhance the available information. Some results on particular areas of a glacier...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.