Abstract

Authors

Yasuko MIZOGUCHI, Yoshikazu OHTANI, Takeshi AOSHIMA, Atsushi HIRAKATA, Satoko YUTA, Satoru TAKANASHI, Hiroki IWATA and Yuichiro NAKAI

Year

2010

Title

Comparison of the characteristics of five quantum sensors
各種光量子センサの特性比較

Journal

Bulletin of the Forestry and Forest Products Research Institute
森林総合研究所研究報告

Volume

Vol.9 No.3 (No.416)

Page

113 - 120

DOI

-

Keywords

aging degradation, azimuthal angle, incident angle, instrument difference, quantum sensor, wavelength
経年変化、方位角、入射角、器差、光量子センサ、波長

URL

http://www.ffpri.affrc.go.jp/pubs/bulletin/416/documents/416-2.pdf

Abstract

Five quantum sensors were tested and compared to evaluate their individual characteristics and their degradation due to aging by using an artificial light source and natural sunlight. The results confirm that the accuracy and stability of each sensor are within the manufacturer-specified range. However, some sensors produce erroneous readings 5 when solar elevation angle is low. The outputs from the various types of sensors differ from each other, and the differences between some sensor types may be greater than the individual differences between the same type of sensors. These results suggest the necessity of examining the instrumental differences when comparing measurements of photosynthetically active radiation conducted with sensors of different types.
5 種類の光量子センサを対象に、人工光源を使用した室内実験および屋外での比較測定 を行い、それぞれのセンサの特性と出力の経時変化を測定した。その結果、各センサの 精度は仕様書に示された範囲内に収まっていることが確認された。ただし、一部の測器 に太陽高度の低いときに誤差が生じやすいことがわかった。各センサ間の器差は、同タ イプの個体差以上の差を生じる可能性があり、タイプの異なるセンサを使用した光合成 有効放射量の比較の際には、器差補正が必要なことが示された。

Site

FJY

Remarks