About
Input Parameters
🌍 Natural Language
⚙️ Parameters
🛰️ Satellite
Solar Zenith 30°
0°–75°
Water Vapour 2.0 g/m²
0–8.5 g/m²
Ozone 0.30 cm·atm
0–0.8 cm·atm
Aerosol (AOT) 0.20
0–3
Altitude 0.05 km
0–7.75 km
Date
📍 Location
Latitude
Longitude
🌞 Solar zenith is computed automatically from lat/lon & date at Run
🧪 ACOLITE Validation
🧪 Gas transmittance (H₂O, O₃, O₂, CO₂, N₂O, CH₄) + Rayleigh — correction engine remains 6S.
🌤️ Atmosphere & Aerosol
Atmospheric Model
Aerosol Type
ℹ️ Maritime (coastal) is default. Rural (=Continental), Urban & Desert also available.
🛡️ Verify
—
Results
🔭

Ready for Correction

Set your parameters and run atmospheric correction. 6S will calculate coefficients for each band.

Running 6S emulator...

🛰️ Band Coefficients

Band Name λ (nm) a b k

Atmospheric Correction Formula:

★ Main Formula
ρs = (ρ_TOA − a·k) / (b·k)
You only need coefficients a, b, k from the table → compute ρs per band

ρ_TOA = L × k   |   k = π·ds² / (F₀·cos θs)

ρs= surface reflectance(unitless, 0–1)
ρ_TOA= at-sensor TOA reflectance(unitless, 0–1)
L= at-sensor radiance(W·m⁻²·sr⁻¹·µm⁻¹)
k= radiance→reflectance factor(sr·µm·W⁻¹)
a= path radiance (Lp)(W·m⁻²·sr⁻¹·µm⁻¹)
b= (τ₂ · E₀) / π(W·m⁻²·sr⁻¹·µm⁻¹)
ds²= Earth–Sun distance (elliptical orbit)(AU²)
F₀= solar irradiance at TOA (ACOLITE Thuillier2003)(W·m⁻²·µm⁻¹)
θs= solar zenith angle(deg)