地表水质
内陆水体的生物光学图层：蓝藻色素、叶绿素与颗粒物浊度。
内陆水体的色素与浊度筛查，采用未经改动的已发表拟合方法。
Bio-optical layers over an inland water body: cyanobacteria pigment, chlorophyll and particulate turbidity.
它能发现什么
它检测什么。
| 材料 | 典型产出环境 | 可能的混淆因素 |
|---|---|---|
| Phycocyanin (Cyanobacterial Biomass) | Eutrophic inland lakes, reservoirs, and mine water retention dams | Coloured dissolved organic matter at the blue end |
| Total Suspended Solids (TSS) & Turbidity | Catchment runoff plumes and river deltas | Sun glint and shallow water benthic reflectance |
方法
工作原理。
输入校准反射率，每个像元都对照公开参考库进行拟合。
Product level gate
Only water-leaving reflectance products are accepted. A land-corrected reflectance product over water produces numbers that look entirely reasonable and are wrong, so the gate is keyed on product level rather than on which bands the sensor happens to carry.
Glint and adjacency handling
Surface glint is removed and the land boundary effect is corrected before any pigment is estimated.
Narrowband pigment baseline
The pigment signal is taken against a baseline drawn from the channels either side of it.
Domain refusal and masking
Land, cloud shadow and shallow water are masked. Where the water falls outside the domain the published fit was derived for, the layer returns a stated reason instead of a number.
技术规格
您得到什么，它在什么数据上运行。
所需环境条件
Method and checks are documented in Axine Applied Spectroscopy Paper #3 · Section 4.3.
适用边界
A screening layer over open, optically deep water. Shallow bottoms and narrow channels are refused.
