測地学会誌
Online ISSN : 2185-517X
Print ISSN : 0038-0830
テクニカルレポート
GNSSデータを用いた干渉SAR に含まれる空間的長波長誤差の低減
森下 遊
著者情報
ジャーナル 認証あり

62 巻 (2016) 2 号 p. 89-100

詳細
PDFをダウンロード (3992K) 発行機関連絡先
抄録

Spatially long wavelength noise which contaminates synthetic aperture radar (SAR) interferograms is still a poorly solved problem for precise measurement of ground surface displacements. In this report, three kinds of noise reduction approaches using displacement data measured by continuous Global Navigation Satellite System (GNSS) observation are proposed; a bilinear curve approach, an interpolation approach, and a low pass filter approach. Results of case studies show that long wavelength noises can be dramatically reduced by these approaches. However, in some cases, these approaches fail, i.e., insufficient noise reduction or undesirably vanishing true displacements. The efficacy of these noise reduction approaches depends on distribution of available GNSS points, ground surface displacement to be detected, and other conditions. An optimal approach should be selected depending on the situation.

著者関連情報
© 2016 日本測地学会
前の記事 次の記事

閲覧履歴
feedback
Top