| Li Shujing,Mao Tianming,Pan Delu. 2002. A study on quality and availability of COCTS images of HY-1 satellite by simulation. Acta Oceanologica Sinica, (4):495－504 |
| A study on quality and availability of COCTS images of HY-1 satellite by simulation |
| A study on quality and availability of COCTS images of HY-1 satellite by simulation |
| Received:February 10, 2002 Revised:June 03, 2002 |
| DOI： |
| Key words:Evaluation radiance CSNR simulation |
| 中文关键词: Evaluation radiance CSNR simulation |
| 基金项目:This research was supported by the National Natural Science Foundation of China under contract No.40006011 and the National "973" Project of China under contract No.G1999043701. |
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| Abstract: |
| Hy-1 is a first China's ocean color satellite which will be launched as a piggyback satellite on FY-1 satellite using Long March rocket. On the satellite there are two sensors:one is the China's ocean color and temperature scanner (COCTS), the other is CCD coastal zone imager (CZI).The COCTS is considered to be a main sensor to play a key role. In order to understand the characteristics of future ocean color images observed, a simulation and evaluation study on the quality and availability of the COCTS image has been done. First, the simulation models are introduced briefly, and typical simulated cases of radiance images at visible bands are introduced, in which the radiance distribution is based on geographic location, the satellite orbital parameters and sensor properties, the simulated method to evaluate the image quality and availability is developed by using the characteristics of image called the complex signal noise ratio (CSNR). Meanwhile, a series of the CSNR images are generated from the simulated radiance components for different cases, which can be used to evaluate the quality and availability of the COCTS images before the HY-1 is placed in orbit. Finally, the quality and availability of the COCTS images are quantitatively analyzed with the simulated CSNR data. The results will be beneficial to all scientists who are in charge of the COCTS mission and to those who plan to use the data from the COCTS. |
| 中文摘要: |
| Hy-1 is a first China's ocean color satellite which will be launched as a piggyback satellite on FY-1 satellite using Long March rocket. On the satellite there are two sensors:one is the China's ocean color and temperature scanner (COCTS), the other is CCD coastal zone imager (CZI).The COCTS is considered to be a main sensor to play a key role. In order to understand the characteristics of future ocean color images observed, a simulation and evaluation study on the quality and availability of the COCTS image has been done. First, the simulation models are introduced briefly, and typical simulated cases of radiance images at visible bands are introduced, in which the radiance distribution is based on geographic location, the satellite orbital parameters and sensor properties, the simulated method to evaluate the image quality and availability is developed by using the characteristics of image called the complex signal noise ratio (CSNR). Meanwhile, a series of the CSNR images are generated from the simulated radiance components for different cases, which can be used to evaluate the quality and availability of the COCTS images before the HY-1 is placed in orbit. Finally, the quality and availability of the COCTS images are quantitatively analyzed with the simulated CSNR data. The results will be beneficial to all scientists who are in charge of the COCTS mission and to those who plan to use the data from the COCTS. |
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