Axine Labs
Free / commercial imagery

Clorofila del Dosel y Borde Rojo

Posición de inflexión del borde rojo, seguida entre adquisiciones sobre bosque manejado.

Posición del borde rojo, que sigue el pigmento del dosel. Se rechaza en sensores que no pueden resolverla.

Clorofila del Dosel y Borde Rojo
In view

Red-edge inflection position across a managed forest, tracked between acquisitions.

QUÉ ENCUENTRA

Qué detecta.

MaterialEntorno típicoQué puede confundirlo
Red-edge inflection positionManaged forests, natural stands, and broadacre cropsSelf-shadowing in steep terrain and aerosol scattering in deep valleys

MÉTODO

Cómo funciona.

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

01Step 1

Band feasibility check

Feasibility is derived from band centre, band width, ground sample and product level, not from a hand-kept list per sensor. An instrument with no band inside the red edge is refused before anything is computed.

02Step 2

First-derivative inflection extraction

Locates the steepest point of the red edge, which is where canopy pigment shows up.

03Step 3

Time series over the stand

One point per acquisition, ordered by ground time, with gaps left visible and superseded points counted rather than quietly dropped.

04Step 4

Quality masking

Snow, water, cloud shadow and exposed rock are masked out.

ESPECIFICACIONES

Qué obtiene, y sobre qué corre.

Valores entregadosInflection wavelength in nanometres, floating point
SalidaRed-edge position raster
Plazo de entregaMultispectral scenes are small and clear quickly; hyperspectral granules are the slow case
Formatos
Cloud-Optimized GeoTIFF (COG)Vector Stand Polygons (GeoJSON)Provenance record (sensor, method version, scene ids)

Condiciones que necesita

Sun angle limit:60°
Cloud cover limit:10%
Vegetation cover limit:100%

Method and checks are documented in Axine Applied Spectroscopy Paper #4 · Section 4.1.

Leer el artículo

Alcance

The signal flattens once the canopy is dense, so it separates stressed stands more sharply than healthy ones.