All issues
Volume 41 (2002)
- Issue 6 Pages 1-
- Issue 5 Pages 1-
- Issue 4 Pages 1-
- Issue 3 Pages 1-
- Issue 2 Pages 1-
- Issue 1 Pages 1-
Predecessor
Volume 41, Issue 1
Displaying 1-16 of 16 articles from this issue
- |<
- <
- 1
- >
- >|
-
[in Japanese]2002 Volume 41 Issue 1 Pages 1
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (1757K) -
[in Japanese]2002 Volume 41 Issue 1 Pages 2-3
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (3675K) -
[in Japanese], [in Japanese]2002 Volume 41 Issue 1 Pages 4
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (120K) -
[in Japanese]2002 Volume 41 Issue 1 Pages 5-8
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (451K) -
[in Japanese]2002 Volume 41 Issue 1 Pages 9-11
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (513K) -
[in Japanese]2002 Volume 41 Issue 1 Pages 12-15
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (2200K) -
[in Japanese], [in Japanese]2002 Volume 41 Issue 1 Pages 16-20
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (1087K) -
[in Japanese], [in Japanese], [in Japanese]2002 Volume 41 Issue 1 Pages 21-27
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (7687K) -
Ts. Purevdorj, R. Yokoyama2002 Volume 41 Issue 1 Pages 28-38
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSThis paper makes contribution to the problem of automatic detection of GCP's for AVHRR imagery. The approach presented in this paper, consider improvement to edge detection accuracy for AVHRR imagery using an NDVI threshold, adaptive thresholding and spatial filtering techniques. Two different matching algorithms based on the edge extraction approach were applied to the automated detection of GCP's for the complete geometric registration of AVHRR data. The first is a line matching algorithm for the AVHRR image in satellite projection and the second is a pattern matching algorithm for the ground projected image. In order to apply this method to operational processing of AVHRR data, coastline vector data, GCP and GCMP data sets and elevation data were created. The importance and novelty of the suggested approach is that GCP identification and geographical data set creation have been integrated and an algorithm allowing fully automatic GCP detection for AVHRR was developed. The method has been applied to geometric registration of 10 day composite AVHRR data for the Asian region. In the future, it can be applied to operational processing of AVHRR data on a global scale.View full abstractDownload PDF (6691K) -
Ryo ITO, Kohei CHO, Haruhisa SHIMODA, Toshibumi SAKATA, Sei-ichi SAITO ...2002 Volume 41 Issue 1 Pages 39-46
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSA new bilateral fisheries agreement was formed between Japan and South Korea in 1999. Since February 22, 1999, the two countries have set the exclusive fishing zone and are jointly controlling a provisional fishing zone encompass the Takeshima (Tok-do in Korea) Island. The borders of the zone are 35 nautical miles from the shores of both countries, with the eastern border at 135 degrees 30 minutes east longitude. Squid anglers and surrounding-net fishers in this area use powerful lights when fishing at night. The authors have examined the night time DMSP/OLS images taken before and after the fishing zone initiation. The light-fishing fleet distribution in the images strongly suggests that the fishing agreement is effectively controlling the location of fishing fleets around this area.View full abstractDownload PDF (1271K) -
Takuhiko MURAKAMI2002 Volume 41 Issue 1 Pages 47-55
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSMinnaert correction method is one of the most appropriate models that correct topographic effects on remotely sensed data. However, the variations of the Minnaert constants have not been examined for any forest types. The purpose of this research was to investigate the extent of the variation of the Minnaert constant in three different forest types. Three forest types were selected for the analysis ; broad-leaved natural forest, coniferous plantations, and bamboo forest. 7 scenes of SPOT/HRV data observed in 1997 were selected and orthorectified with digital elevation models and digital topographic maps. The Minnaert constants were obtained through a regression analysis between solar incidence angles and the original satellite data. The results showed bands 1 and 2 indicated the seasonal variation of Minnaert constant, which had the peak in summer. In those bands, there were negative correlations between the solar zenith angles and the Minnaert constants. On the other hand, the band 3 indicated unclear variations in the Minnaert constants rather slight fluctuations. Then there was not significant correlation between the solar zenith angles and the Minnaert constants of the band 3. The results of this study suggested that visible band and near infrared one differ in the annual change pattern of the Minnaert constant.View full abstractDownload PDF (1092K) -
Masaki YASUKAWA, Mikio TAKAGI2002 Volume 41 Issue 1 Pages 56-69
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSSince the GMS-5 observes the earth very widely and frequently, its S-VISSR data are very useful not only for meteorology but also for sea surface and land surface temperature analysis, heat and water budget analysis and the various kinds of database generated from the S-VISSR data will contribute the understanding of earth environmental change. In order to process GMS-5 S-VISSR data immediately after reception and provide academic researchers the geometrically corrected data useful for the time series analysis, a high-speed and precise geometric correction method is described. For precise geometric correction, residual errors are acquired by matching the S-VISSR image pieces to their corresponding ground control point templates on image coordinate, and the affine coefficient is calculated using the errors. For fast computation, the output image of the map coordinate is divided into small blocks. Each latitude-longitude of four corners on a small window is converted to line-pixel in image coordinate by systematic geometric transformation and affine transformation is carried out toward the line-pixel for precise geometric correction. In the case of internal points excluding four corners in the small window, each correspondence of line-pixel and latitude-longitude is calculated by hi-linear interpolation using correspondences of the four corners for speeding up the geometric correction. As the result, the accuracy measured at low altitude points is about 0.5 pixels in average and within 2 pixels, and the processing time is about 6 minutes. The product is open for public use via the Internet.View full abstractDownload PDF (4563K) -
Akira Otuka, Shigeki Kobayashi2002 Volume 41 Issue 1 Pages 70-84
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSAlthough many studies indicated a linear relationship between precipitable water values derived from GPS measurements and those derived from radiosonde or water vapor radiometer measurements, no such evidence has been reported for the combination of synthetic aperture radar (SAR) interferometry and radiosonde measurements. Therefore, this study compares SAR atmospheric delay with the delay calculated using data from a radiosonde launched within the SAR scene extent. As might be expected, the result shows a clear linear relationship between delays calculated by the two methods. The result also reveals that large spatial variations in the atmospheric delay can occur within a small area. Moreover, we discuss various meteorological processes that generate the spatial variation of the delay.View full abstractDownload PDF (5262K) -
Kohei ARAI, Kaname SETO, Taro NAKAO2002 Volume 41 Issue 1 Pages 85-90
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSA spatial feature extraction method based on Gabor descriptor is proposed. It is found that the restored image quality, in terms of root mean square error between the original and the restored images depends on the support length of the mother wavelet and is much better than that with Fourier descriptor which is existing method for spatial feature description.View full abstractDownload PDF (1626K) -
[in Japanese]2002 Volume 41 Issue 1 Pages 91-92
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (2398K) -
2002 Volume 41 Issue 1 Pages 92
Published: March 06, 2002
Released on J-STAGE: March 19, 2010
JOURNAL FREE ACCESSDownload PDF (120K)
- |<
- <
- 1
- >
- >|