Axine Labs
Free / commercial imagery

Inércia Térmica de Infraestrutura

Inércia térmica aparente a partir de um par dia e noite: material denso contra aterro solto.

Diferenciação termal entre dia e noite, normalizada pelo albedo. Material denso perde calor mais devagar que aterro solto.

Inércia Térmica de Infraestrutura
In view

Apparent thermal inertia from a day and night pair: dense material cools slowly, loose fill cools fast.

O QUE ELA ENCONTRA

O que ela detecta.

MaterialContexto típicoO que pode confundi-la
Apparent Thermal Inertia (ATI) AnomaliesCivil infrastructure corridors, foundation pads, runway subgrades, and shallow buried utilitiesSurface wind gusts altering convective heat transfer

MÉTODO

Como funciona.

Entra reflectância calibrada, e cada pixel é ajustado contra uma biblioteca pública de referência.

01Step 1

Pairing a day and a night pass

The midday and pre-dawn acquisitions are placed on a common grid. Both must cover the same ground inside one diurnal cycle, which is the constraint that makes this hard to procure rather than hard to compute.

02Step 2

Broadband albedo

Optical bands are integrated into a broadband albedo, which sets how much solar energy the surface took in during the day.

03Step 3

Apparent thermal inertia

ATI = (1 - α) / (T_day - T_night). The word apparent is load-bearing: this is a proxy for heat capacity and conductivity, not a measurement of either.

04Step 4

Segmentation into high and low inertia

Dense material separates from loose fill. What causes the contrast is an interpretation the map cannot make for you.

ESPECIFICAÇÕES

O que você recebe, e sobre o que ela roda.

Valores entreguesApparent thermal inertia, floating point, unitless
SaídaApparent thermal inertia surface
Prazo de entregaSet by the day and night acquisition window, not by processing
Formatos
Cloud-Optimized GeoTIFF (COG)Vector Thermal Contours (GeoJSON)Provenance record (both acquisition times in UTC, method version)

Condições de que precisa

Sun angle limit:50°
Cloud cover limit:0%
Vegetation cover limit:20%

Method and checks are documented in Axine Applied Spectroscopy Technical Whitepaper · Series 5.

Ler o artigo

Escopo

Both passes have to be cloud-free and calm. Wind at night masks the signal this depends on.