[in Japanese]

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Atmospheric delay of radio wave propagation is a major source of error for crustal deformation measurements using InSAR(Interferometric Synthetic Aperture Radar).Atmospheric delay is caused by topography and horizontal inhomogeneity of water vapor distribution.When accurate weather information is not enough,it is difficult to estimate effects of horizontal water vapor inhomogeneity.This paper discusses the analog weather map method to estimate water vapor effects on the satellite JERS-1 SAR interferometry in the observation period with no accurate weather data.A case study was undertaken of a JERS-1 interferometric pair on Nobi plain.Using GPV-MSM(Grid Point Value of Meso-Scale Model),water vapor distribution in the satellite observation days is recovered,and the atmospheric delay generated by water vapor inhomogeneity was quantitatively evaluated.The results show that the vertical change of differential refractivity between the two observation days does not a simple linear relationship. Maximum atmospheric delay difference due to horizontal water vapor inhomogeneity is about 38mm in the study area.Spatial distribution pattern of the atmospheric delay estimated by the GPV-MSM data is found to be similar to the phase pattern of differential interferometry.

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The study attempts to acquire, distribute, and utilize the outcrop information as digital information. We aim at construction of an open system which is available in a various position, and then establishment of standard technology for the realization of the system. The purpose of this paper is to consider and carry out manufacture of "Outcrop Information Vocabulary (OIV)" as the first stage of the study. Since outcrop information is basic primary information, the semantic web technology is employed to associate with various other systems on the Web; for instance, OIV is designed with use of ontology and described by Web Ontology Language (OWL). The OIV includes 14 classes including "FieldObservation" class to describe field observation. Moreover, we create test system which field researchers use to test the effectiveness of OIV. The result leads to the conclusion that files created by use of OIV are easy of mutual alteration and association function with other XML-base format, therefore, OIV has high affinity with existing technology.

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