Axine Labs
Free / commercial imagery

Calidad de Aguas Superficiales

Capas bioópticas sobre aguas interiores: pigmento de cianobacterias, clorofila y turbidez por partículas.

Cribado de pigmento y turbidez en aguas interiores, con ajustes publicados aplicados sin cambios.

Calidad de Aguas Superficiales
In view

Bio-optical layers over an inland water body: cyanobacteria pigment, chlorophyll and particulate turbidity.

QUÉ ENCUENTRA

Qué detecta.

MaterialEntorno típicoQué puede confundirlo
Phycocyanin (Cyanobacterial Biomass)Eutrophic inland lakes, reservoirs, and mine water retention damsColoured dissolved organic matter at the blue end
Total Suspended Solids (TSS) & TurbidityCatchment runoff plumes and river deltasSun glint and shallow water benthic reflectance

MÉTODO

Cómo funciona.

Entra reflectancia calibrada, y cada píxel se ajusta contra una biblioteca pública de referencia.

01Step 1

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.

02Step 2

Glint and adjacency handling

Surface glint is removed and the land boundary effect is corrected before any pigment is estimated.

03Step 3

Narrowband pigment baseline

The pigment signal is taken against a baseline drawn from the channels either side of it.

04Step 4

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.

ESPECIFICACIONES

Qué obtiene, y sobre qué corre.

Valores entregadosBio-optical indices, floating point
SalidaSurface water bio-optical raster
Plazo de entregaOcean-colour granules are small next to hyperspectral ones, so these jobs clear quickly
Formatos
Cloud-Optimized GeoTIFF (COG)Vector Water Body Polygons (GeoJSON)Provenance record (published fit used, granule id, refusal reasons)

Condiciones que necesita

Sun angle limit:55°
Cloud cover limit:5%
Vegetation cover limit:10%

Method and checks are documented in Axine Applied Spectroscopy Paper #3 · Section 4.3.

Leer el artículo

Alcance

A screening layer over open, optically deep water. Shallow bottoms and narrow channels are refused.