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RUT: Radiometric uncertainty propagation tool for optical level-1 radiance data (ESA IDEAS+ Programme)

License: GNU General Public License v3.0

Python 52.20% HTML 42.61% Haskell 0.85% CSS 3.64% Shell 0.70%

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amdilo shunt16 chintan2108 alexisderu

snap-rut's Issues

seeking uncertainty documentation

Is there a place to view the uncertainty algorithm documentation for cli users? Thanks, and sorry in advance if this is listed somewhere that I missed.

alpha**2 in rut_algo

Only a question regarding the u_noise component in rut_algo:
Why do you use "alpha**2" here, not "alpha"?:

snap-rut/src/main/python/s2_rut_algo.py

Line 80 in e638acd

u_noise = 100 * np.sqrt(self.alpha ** 2 + self.beta * cn) / cn

alpha value if from the noise model ALPHA here :

snap-rut/src/main/python/s2_rut.py

Lines 291 to 294 in e638acd

def get_alpha(self, datastrip_meta, band_id):
return ([i for i in datastrip_meta.getElement('Quality_Indicators_Info').getElement('Radiometric_Info').
getElement('Radiometric_Quality_list').getElements() if i.getName() == 'Radiometric_Quality'][band_id]
.getElement('Noise_Model').getAttributeDouble('ALPHA'))

And from Sentinel2 MSI specifications here :

https://earth.esa.int/documents/247904/685211/Sentinel-2-Products-Specification-Document

it is written page 84 that the noise is :
Noise= square root (Alpha_X + Beta_X* X)

not

Noise= square root (Alpha_X**2 + Beta_X* X)

Sign plugin

The plugin is not signed, so it emits a warning when installing it from the update center

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