Landsat 5 / 7 / 8 / 9 Collection 2 Level-2

USGS / NASA

Specification

Code: AL05
Reliability: A+ Gold
Variables delivered: Chlorophyll proxy (green/blue, needs local calibration), FAI, turbidity, MNDWI, water surface temperature
Resolution: 30 m
Cadence: 16 days per satellite (~8 d with two in orbit)
Coverage: 1984 (L5) / 1999 (L7) / 2013 (L8 → present
Cost: FREE
Login required: No (GEE) / free (USGS ERS account)
Latency: ~1-2 weeks
CSV direct?: Via GEE → .csv export
Sensor: Landsat 8 OLI — 30 m, 16 day revisit

Applicability by site

Chakaria HDSS YES Rural COASTAL

ESSENTIAL for 2000-2015

Matlab HDSS YES Rural riverine

ESSENTIAL for 2000-2015

Dhaka City YES Urban inland

ESSENTIAL for 2000-2015

Access

Route: GEE · USGS M2M API · AWS Open Data S3
Endpoint / asset ID: LANDSAT/LT05|LE07|LC08|LC09/C02/T1_L2 | m2m.cr.usgs.gov/api
Pipeline step: 3 Extract
Documentation: https://developers.google.com/earth-engine/datasets/catalog/LANDSAT_LC08_C02_T1_L2

Command

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

What to watch for

VALIDATION STATUS

Well validated for land · water-quality retrieval requires LOCAL calibration

KNOWN LIMITATION

NO RED-EDGE BAND → true NDCI is impossible. This is the weakest link in your 2000-2015 record. Get Sarker et al. 2019 (Front. Mar. Sci. 6:598) for Bangladeshi coefficients. L7 SLC-off stripes after 2003-05-31.