Surface downward shortwave radiation (DSR) is a fundamental variable in determining the Earth's balance and essential many applications. Considerable efforts have been devoted to algorithm development, product generation, validation. However, few studies focused on comparing retrieval approaches, examining their strengths weaknesses, identifying most suitable scenarios for each approach. In thi...

The article is devoted to the problem of improving FPGA (Field Programmable Gate Array) components developed for safety related systems. are improved in checkability their circuits and trustworthiness results calculated on them support fault-tolerant solutions, which basic ensuring functional critical Fault-tolerant solu tions need protection from sources multiple failures, include hidden fault...

In this paper, we present a cooperative stereo system based on two pant-tilt-zoom (PTZ) cameras that can localize a moving target in a complex environment. Given an approximate target position that can be estimated by a fixed camera with a wide field of view, two PTZ cameras with a large baseline are pointed toward the target in order to estimate precisely its position. The overall method is di...

The continuously increasing demand of accurate quantitative high quality information on land surface properties will be faced by a new generation of environmental Earth observation (EO) missions. One current example, associated with a high potential to contribute to those demands, is the multi-spectral ESA Sentinel-2 (S2) system. The present study focuses on the evaluation of spectral informati...

The leaf area index (LAI) is a parameter that can indicate the vegetation canopy structure and accurately reflect growth state of vegetation. Most studies estimate LAI single in homogeneous areas, but only few have explored inversion heterogeneous areas. Canopy heterogeneity regions may increase uncertainty difficulty quantitative inversion. Therefore, retrieval areas needs to be studied obtain...

Diffuse optical spectroscopy (DOS) provides a powerful tool for fast and noninvasive disease diagnosis. The ability to leverage DOS to accurately quantify tissue optical parameters hinges on the model used to estimate light-tissue interaction. We describe the accuracy of a lookup table (LUT)-based inverse model for measuring optical properties under different conditions relevant to biological t...

The Peak Dynamic Power Estimation (PDPE) problem involves finding input vector pairs that cause maximum power dissipation (maximum toggles) in circuits. The PDPE problem is essential for analyzing the reliability and performance of digital circuits prior to fabrication. This paper proposes a methodology for solving the PDPE problem on circuits mapped onto Field Programmable Gate Arrays (FPGAs)....