SatHDSS
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.

1. Ocean colour (single sensor)

AL13 · MODIS-Terra Level-3 SMI
NASA OB.DAAC
B Usable FREE NO ACCOUNT

Source · duration · capture cadence

Data source
NASA OB.DAAC
Access route
GEE · OB.DAAC API
Endpoint / asset
NASA/OCEANDATA/MODIS-Terra/L3SMI
Duration
2000-02-24 → present
Capture cadence
Daily / 8-day / monthly
Resolution
4.6 km
Delivers
Chlorophyll-a, Rrs, SST
Command
10_algae_daily_3sites.py --sensors ocean
Why it is used for cholera. Validated but with known drift
Why not — catalogue limitation. Blue-band sensor degradation after ~2010. Cross-calibrate against Aqua or just use OC-CCI, which handles this.

Site applicability

SiteVerdictWhy
Chakaria HDSS YES YES — and it is the ONLY 4 km sensor covering Feb 2000 to mid-2002
Matlab HDSS PARTIAL Regional forcing only
Dhaka City NOT APPLICABLE NOT APPLICABLE

Reliable · accessible · authentic

B Usable
Reliability tier
OPEN
Accessible
NASA OB.DAAC
Authentic — operator
Documentation: https://developers.google.com/earth-engine/datasets/catalog/NASA_OCEANDATA_MODIS-Terra_L3SMI
Full dataset page →