GEE Sen2Cor L2A NDCI → chlorophyll polynomial

(your own pipeline)

Specification

Code: AL19
Reliability: C Caution
Variables delivered: Uncalibrated chlorophyll-a estimate in mg/m3
Resolution: 10-20 m
Cadence: 5 days
Coverage: 2017-03 → present
Cost: FREE
Login required: No
Latency: ~1-3 days
CSV direct?: YES
Sensor: Sentinel-2 MSI — 20 m, 5 day revisit

Applicability by site

Chakaria HDSS YES Rural COASTAL

SCREENING ONLY

Matlab HDSS YES Rural riverine

SCREENING ONLY

Dhaka City YES Urban inland

SCREENING ONLY

Access

Route: GEE
Endpoint / asset ID: computed in 06_algae_gee_3sites.py
Pipeline step: 3 Extract
Documentation: https://doi.org/10.1016/j.rse.2011.10.016

Command

cd 01_Scripts
python 10_algae_daily_3sites.py --sensors s2

What to watch for

VALIDATION STATUS

NOT VALIDATED for Bangladesh

KNOWN LIMITATION

The Mishra & Mishra polynomial was fitted on CHESAPEAKE BAY. Treat the output as an ORDINAL INDEX, not mg/m3, until you calibrate locally. Two ways to fix: (1) get Sarker et al. 2019 coefficients, (2) collect in-situ chlorophyll.

Other datasets from the same sensor

AL03 · Sentinel-2 MSI Level-2A (harmonised) AL18 · Sentinel-2 Level-1C + ACOLITE Dark Spectrum …