用940 nm通道遥感水汽总量的可行性试验

资助项目: 本项研究得到FY-3气象卫星预演课题资助

FEASIBILITY EXPERIMENTS ON SOUNDING WATER VAPOR AMOUNT WITH 940 nm SPECTRAL BAND

摘要: 在940 nm水汽弱吸收带和其附近窗区选取若干探测通道, 采取不同通道组合, 模拟计算通道反射率比值, 并建立了该比值与水汽含量之间的统计关系。用探空观测独立样本检验水汽含量模拟计算结果, 相对误差小于6%。
- 卫星遥感;
- 水汽总量;
- 对比检验
Abstract: The water vapor amount is simulated through its statistical relation to the ratios of reflectance in several channels, which are selected and grouped from the 940 nm weak water vapor absorption band and the vicinal window region. The simulation results of water vapor amount have an average relative error of 6% by compared with the independent radiosonde observation.
- Satellite remote sensing;
- Water vapor amount;
- Contrast test

图 1 6种模式大气温 (左)、压 (右) 廓线

下载: 全尺寸图片幻灯片

图 2 α₁/ α₅通道组合R-ln (q) 的关系

(其中Y=R, X=ln (q) 下同)

下载: 全尺寸图片幻灯片

图 3 通道组合R-ln (q) 的关系

下载: 全尺寸图片幻灯片

图 4 通道组合R-ln (q) 的关系

下载: 全尺寸图片幻灯片

表 1 各通道组合的通道反射率之比

表 2 用于拟合通道反射率比与水汽含量曲线的数据

表 3 对用公式R=Aln (m)+B反演结果的检验

[1]	曾庆存.大气红外遥测原理.北京:科学出版社, 1974.81-92.
[2]	Frouin R, Deschamps P Y, Lecomte P.Determination from space of atmospheric total water vapor amounts by differential absorption near 940 nm:theory and airborne verification.J.Appl.Meteor., 1990, 29(6):448-460. doi: 10.1175/1520-0450(1990)029<0448:DFSOAT>2.0.CO;2
[3]	Kaufman Y J, Gao B C.Remote sensing of water vapor in the near IR from EOS/MODIS, IEEE Trans.Geosci.Remote Sensing, 1992, 30 (5):871-884. doi: 10.1109/36.175321
[4]	Gao B C, Goetz A F H.Column atmospheric water vapor and vegetation liquid water retrievals from airborne imaging spectrometer data.J.Geophys.Res., 1990, 95(D4) :3549-3564. doi: 10.1029/JD095iD04p03549
[5]	King M D, Kaufman Y J, Menzel W P, et al.Remote sensing of cloud, aerosol and water vapor properties from the Moderate Resolution Imaging Spectrometer (MODIS).IEEE Trans.Geosci.Remote Sensing, 1992, 30(1) :2-27. doi: 10.1109/36.124212
[6]	Vermote E F, Tanre D, Deuze J L, et al.Second simulation of the satellite signal in the solar spectrum, 6S:An overview.IEEE Trans.Geosci.Remote Sensing, 1994, 35(3):675-685.
[7]	Anderson G P, Clough S A, Kneizys F X, et al.AFGL Atmospheric Constituent Profiles (0-120 km), AFGL-TR-86-0110.Hanscom AFB, Air Force Geophysics Laboratory, 1986.
[8]	黄意玢, 董超华, 刘志权, 等.940 nm水汽通道反射率计算试验.应用气象学报, 2002, 13(4):待发表. http://qikan.camscma.cn/jams/ch/reader/view_abstract.aspx?file_no=20020456&flag=1