Network panel
Algae Dataset
Every data hub, dataset, sensor, variable, paper and limitation in one tree — and for each: where it comes from, how far back it goes, how often it captures, why it belongs in a cholera study, and why it does not work everywhere.
Highlight site
All three
Chakaria HDSS
Matlab HDSS
Dhaka City
Choosing a site greys out everything that does not apply there.
- +DATA HUBSwhere the data physically comes from
- +DATASET TYPESgrouped by what kind of water they see
- +SITE-WISEwhat actually applies at each site
- +DURATION & CAPTURE CADENCEdaily · weekly · 10-day · 16-day · monthly
- −VARIABLESwhat is computed from the bands
- +LIMITATIONSwhy not — typed and severity-ranked
- +PAPERSthe evidence, DOI-linked
Variable
FAI
scum ·
expected lag 2-6 weeks
- Formula
B8 - (B4 + (B11 - B4) * (842 - 665) / (1610 - 665))- Sensors
- Sentinel-2 / Landsat / MODIS
- Panel column
fai, fai_wmax- Applies at
- Chakaria Dhaka Matlab
- Reference
- Hu 2009, Remote Sens. Environ. 113(10):2118-2129, doi:10.1016/j.rse.2009.05.012
Why it is used for cholera. Floating Algae Index. Baseline subtraction in the NIR · robust to aerosol, thin cloud and sun glint. Detects SURFACE SCUM, which chlorophyll indices miss.