One of the instruments on board of the ALOS satellite, launched by the Japanese Aerospace Exploration Agency (JAXA) in 2006, is the Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM). PRISM has three cameras with different viewing directions (nadir, forward, backward), recording imagery with a ground resolution of 2.5 m. A main characteristic of raw ALOS PRISM imagery is that dep...

LiDAR systems have become a popular technology, which provides fast and accurate acquisition of object space surface models. The process for correcting the LiDAR data, which is distorted by systematic errors, is accomplished either through strip adjustment or LiDAR system calibration. The strip adjustment reduces or eliminates the discrepancies between overlapping strips using the point cloud c...

We present an autonomous airborne video-aided navigation system that uses video from an onboard camera, data from an IMU, and digitally stored georeferenced landmark images. The system enables self-contained navigation in the absence of GPS. Relative position and motion are tracked by comparing simple mathematical representations of consecutive video frames. Periodically, a single image frame i...

Nowadays, GPS (Global Positioning System) has been widely used to position airplanes, ships, automobiles, migrating animals, and human beings, etc. However, GPS has its own limitations. Other than the user groups for whom GPS is operated, there is no service level agreement with anyone else. As more and more people become dependant on GPS in more and more countries, the political control of GPS...

In these days, the development of positioning technology for realizing ubiquitous environments has become one of the most important issues. The Global Positioning System (GPS) is a well-known positioning scheme, but it is not suitable for positioning in in-door/building environments because it is difficult to maintain line-of-sight condition between satellites and a GPS receiver. To such proble...

Aquarius is a passive microwave radiometer operating at L-band that is designed to measure ocean salinity. Launched in June 2011, the instrument has since been the subject of on-orbit calibration to evaluate its performance and characterize its stability. This study addresses external calibration methods, using observed antenna temperatures to characterize instrument behavior by computing the o...

1. Abstract 2. Introduction 3. Materials and methods 3.1. Macroelectrodes 3.2. Experimental set-up/Recording 3.3. Solutions 3.3.1. Background solutions 3.3.2. Calibration solutions 3.3.3. Pipettes 3.4. Temperature 3.5. Macroelectrode calibration 3.6 Titration experiments 3.6.1. Titration of background solution 3.6.2. Titration of background solution containing organic anions 4. Results 4.1. Mac...

Effect of multipath amplification is found in ultrawideband wireless communication systems with chaotic carrier, whereas information is transmitted with chaotic radio pulses. This effect is observed in multipath environment (residence, office, industrial or other indoor space). It is exhibited as an increase of signal power at the receiver input with respect to the case of free space. Multipath...

In this paper, we address a preamble pattern identification based synchronization system for UWB-based distributed wireless networks. A correlation based preamble pattern identification method is introduced. A network domain division and nodes tree setting approach according to the principle of Voronoi diagram is proposed and discussed. Therefore, synchronization concluding not only synchroniza...