摘要
台湾海峡、福建沿岸及两个淡水湖的表面和剖面光谱测量结果表明,分别由水面之上法和剖面法得到的恰于水面下的遥感反射率(rrs(s)和rrs(p))之间存在一定差异.在量值上,波段平均的无偏百分比误差参数在1.7%～68.3%之间,但50%以上站次≤20%;在光谱形状上两者有很好的相似性,各站次的R2都在0.93以上;490 nm和555 nm波段比无偏百分比误差参数ΦAB(4λ90/λ555)在0.5%～11.0%之间,且近70%的站次ΦAB(4λ90/5λ55)≤5%.在平静湖泊rrs(s)与rrs(p)量值的统计差与美国NASA水色遥感工作组对离水辐射率所做的类似统计相当,但在海洋水体的结果远大于此,分析测量环境条件变化造成的光学参数测量误差是主要原因.
We used GER1500 spectrometer and a home-made profiler to measure remote sensing reflectance in two pools,the Taiwan Strait and the water alongshore Fujian,China. The differences between rn （s） and rn （p）（remote sensing reflectance determined by above- and in-water methods, respectively） were found changing significantly in values for the sea rather than the pools. Following Hooker et al. （2002）,ψB^-A （λall） and ФB^-A（λ490/λ555） were calculated, ranged between 1.7 % - 68. 3 %, yet it was 〈20% for half of the sampling stations. However,R2 were 〉0.9 for all the stations. Ф^-AB（λ490/λ555）ranged between 0.5 %-11.0 %, and it was 〈5 % for 70% stations. It meant that no great deviation of spectral shapes occurred while comparing rn （s） with rn （p）. The statistics results for the pool water were comparable to what Hooker at al. （2002） reported. However,those for the observations on the sea showed much higher ψB ^-A（λall） and ФB^-A（λ490/λ555） was suggested that relatively calm surface for the pools would ensure convincing and constant spectral measurements,while it was not the case for the sea observation.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第A01期6-11,共6页
Journal of Xiamen University：Natural Science
基金
国家自然科学基金(40376031
40331004
40521003)
863计划(2002AA639540
2006AA09A302)
教育部创新群体计划
厦门大学新世纪人才计划联合资助
关键词
水面之上法
剖面法
遥感反射率
above-water method
in-water method
remote sensing reflectance
