A study of paddy monitoring system using NOAA and MOS-1 data
Tsukasa Hosomura, Yoshiaki Matsumae,
Haruhisa Shimoda and Toshibumi Sakata
Tokai University Research & Information Center
Tomigaya 2-28-4, Shibuya-ku, Tokyo 151, Japan
Introduction
This paper describes about the regional paddy monitoring system using remote sensing technology. Target area of this study is large paddy fields spreading over Hua Zhong and Hua Nan area, i.e. basin of Yang Zi river. This area has a regional scale and it is very difficult to get around informations in a timely manner. NOAA AVHRR data is optimal for such monitorings. It is difficult to get the information about aground truth data. In this study, a system in order to obtain the necessary informaions of paddies in this area within certain time internal by using NOAA AVHRR and MOS-1 MESSR images are examined.
This system is composed of the following steps. NOAA AVHRR images are collected in Tokai University Space Infromation Center (TSIC) in Kumamoto, Japan. These data are transported to Tokai University Research & Information Center (TRIC) in Tokyo and processed there. Data processings are composed of three steps. First step is preprocessings which include geometric corrections and radiometric correction. Geometric corrections were conducted to precisely co-register each images. Radiometric distortions mainly caused by incidence angle difference of sun light. In the second step, a cloud free image of the target area was generated by combining images within one or two weeks. In the third step, the information of paddy growing stages were extracted using a combination of band 1 and band 2 of cloud free AVHRR image with the aid of MOS-1 MESSR data as ground truth data. In this step two kinds of processings were examined. One is the false color composite of band 1 and band 2 while the other is the use of vegetation index. In both cases, regional scale paddy conditions have been effectively monitored within reasonable time duration.
Image data used in this study
- Test image data
Test image data used in this study are as follows:
| Date set 1 | NOAA-9 and NOAA-10
1988. May 15 - May . 24 | 5 images |
| Data set 2 | NOAA-9 and NOAA-10 |
| Data Set 3 | NOAA-9 and NOAA-10
1988. June. 24 - June 30 | 8 images |
A NOAA image of the target area is shown in
fig 1 which was taken on June 4, 1988. Target area of this study is Hua Zhong and Hua Naan are. i.e basin of Tang Zi river.
Fig. 1 The object area of this study
- Images used as ground truth data
Following MOS-1 MESSR images are used as ground truth data.
MOS-1 MESSR. PATH-35 (E), ROW 72, 75, 78
| DATA 1 : |
1989. MAY 2 |
| DATA 2 : |
1989. JUNE 5 |
| DATA 3 : |
1989.JULY 2 |
