Yoshimura M.,PASCO Corporation
International Journal of Remote Sensing | Year: 2012
A key link to understand the relationship between tropical forest canopy physiology and remote-sensing technology is forest light distribution. Accordingly, we conducted three-dimensional light environment measurements to acquire a quantitative and qualitative understanding of tropical rainforests at Lambir Hills National Park, Sarawak, Borneo, Malaysia, as a typical tropical rainforest region. The aim of this study was to elucidate links between canopy physiological studies and remote-sensing technology, and to investigate the up-scaling capability of canopy processes and mechanisms. Measurements were conducted using a ground-based laser profiler system and terrestrial survey instrument. For understanding qualitative forest characteristics, both reflective and transmissive light measurements were conducted, using photon and quantum sensors and a spectroradiometer. Our results suggest there is no great difference in canopy height, when all trees are mature, are interdependent and are employing the same growth strategies. Photosynthetic active radiation attenuation showed no changes over time. © 2012 Copyright Taylor and Francis Group, LLC.
Sugihara K.,Meiji University |
Okabe A.,Aoyama Gakuin University |
Satoh T.,PASCO Corporation
GeoInformatica | Year: 2011
We present a general framework of hierarchical methods for point cluster analysis on networks, and then consider individual clustering procedures and their time complexities defined by typical variants of distances between clusters. The distances considered here are the closest-pair distance, the farthest-pair distance, the average distance, the median-pair distance and the radius distance. This paper will offer a menu for users to choose hierarchical clustering algorithms on networks from a time complexity point of view. © 2009 Springer Science+Business Media, LLC.
Sasagawa T.,PASCO Corporation
35th Asian Conference on Remote Sensing 2014, ACRS 2014: Sensing for Reintegration of Societies | Year: 2014
Earth Observation satellites deliver information quickly about the areas of disaster caused by flooding. PASCO creates flood hazard maps, tsunami hazard maps, and other hazard maps that serve as basic data contributing to the enhancement of voluntary disaster prevention capability. The company's mitigation approaches consist of observing wide area information and 3D data creation, quick analysis of acquired data from different sensing systems, their visualization & supply, data transmission and immediate processing functions during and after the flood events. The created detailed estimated flood maps and the analyzed results are provided efficiently to the relevant ministries and several organizations including the disaster affected municipalities, private corporations, media, etc.
Pasco Corporation | Date: 2010-05-28
An object of the present invention is to provide a movable information collection apparatus capable of grasping the current situation in a timely fashion. Also, an object of the present invention is to provide a geographical monitoring system capable of utilizing the movable information collection apparatus. The movable information collection apparatus includes an observation data collection antenna system that receives observation data obtained by observing an observation target area from the air, a geographic information database that stores previously acquired geographic information in the observation target area, an evaluation calculation unit that calculates and outputs a difference between the observation data and the previously acquired geographic information, the observation data collection antenna system, the geographic information database, and the evaluation calculation unit being mounted on a movable pedestal.
Pasco Corporation | Date: 2010-08-12
A photography unit photographs a target, a control unit acquires distance data between a photography position and a target to be photographed of the photography unit, an azimuth angle and an elevation/depression angle of a photography direction of the photography unit together with the image information by an angle distance measurement unit synchronously or asynchronously to the shutter operation of the photography unit. The angle distance measurement unit has a configuration without using an axis fixed onto a mobile object. Coordinate information of the photography position of the photography unit is acquired from the coordinate measurement unit synchronously to asynchronously to the shutter operation. The control unit calculates coordinate information of a photographing target, based on the data of the acquired distance data, the azimuth, elevation and depression angles, and the coordinate information.