What is atmospheric correction of satellite imagery?

What is atmospheric correction of satellite imagery?

Atmospheric correction is the process of removing the effects of the atmosphere on the reflectance values of images taken by satellite or airborne sensors. Atmospheric effects in optical remote sensing are significant and complex, dramatically altering the spectral nature of the radiation reaching the remote sensor.

What is radiometric correction in remote sensing?

radiometric corrections aim to precisely estimate the reflectivity of an environment, by compensating for the distortions related to the used antenna system, to positioning errors and certain characteristics of the electronic components. From: Microwave Remote Sensing of Land Surface, 2016.

What is atmospheric correction used for?

Atmospheric correction removes the scattering and absorption effects from the atmosphere to obtain the surface reflectance characterizing (surface properties).

Why do we use atmospheric correction?

The objective of atmospheric correction is to determine true surface reflectance values by removing atmospheric effects from satellite images. Atmospheric correction is arguably the most important part of the pre-processing of satellite remotely sensed data and any omission produces erroneous results.

Is there radiometric calibration for Landsat 8 Oli?

In preparation of Landsat Collection 2 processing, the radiometric calibration of both Landsat-8 TIRS bands will be updated.

What kind of sensors are on Landsat 8?

The Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) instruments onboard the satellite have proven to be outstanding sensors; however, all sensors have required radiometric and geometric refinements to ensure good calibration and data continuity.

When was Landsat 8 Operational Land Imager ( OLI ) updated?

Remote Sens. 2014 , 6, 11607-11626. The absolute radiometric calibration of the Landsat 8 Operational Land Imager (OLI) was updated in February 2017 to reflect changes seen in the instrument’s response to the on-board calibrators indicating a change in the instrument.

What is the stray light effect on Landsat 8?

Stray light from far out-of-field has affected the Landsat 8 Thermal Infrared Sensor (TIRS) absolute calibration since launch. An attempt to correct for it was made in January 2014 (see calibration notice from January 29, 2014) but work continued to develop a real model of the stray light effect in the telescope.