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Questions tagged [atmospheric-correction]

Atmospheric correction is the process of removing atmospheric factors that influence the values in remotely sensed imagery.

33 questions with no upvoted or accepted answers
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1answer
256 views

Identifying pixels with sun glint in a satellite image (for atmospheric correction)

Wondering if anyone knows a way (perhaps objective) to identify pixels that are infected with sun glint in an image. I'm using Hedley's 2005 approach in a python to deglint my image but this approach ...
2
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0answers
35 views

underwater mosaic with overlapping photos

What is the best approach to creating a mosaic with underwater photos. The photos are black and white. They suffer from non-uniform illumination, i.e. the middle of the photo is bright and the edges ...
2
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1answer
158 views

Planet filter file for ENVI atmospheric correction

I have 4 band Planet Scope multispectral imagery that I am trying to process in ENVI. It is the analytic data, so it is already radiometrically corrected. I have converted the .tif to a BIL, and ...
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0answers
1k views

Earth Engine Sentinel-2 atmospheric correction

I want to run some time series analysis on sentinel-2 data in EE for my master thesis. However the algorithms for Sen-2 in EE are scarce. The biggest issue is that there isn't any for atmospheric ...
2
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0answers
326 views

Open source absolute atmospheric corrections for Sentinel-2

I am searching for open source absolute atmospheric correction processors for Sentinel-2. There are many of proprietary ones (FLAASH, QUACS, MACCS) which I cannot use for my study. Beside DOS1 (QGIS ...
2
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0answers
90 views

Improving FLAASH atmospheric correction to accurately represent subtle features in a target's spectral profile?

I am attempting to use ERDAS target detection models to detect/differentiate a specific type of soil from a general background. We have gathered spectral signatures of the target soil in the field ...
2
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0answers
186 views

i.atcorr - Landsat 8

I am trying to apply atmospheric correction to Landsat 8 scenes using i.atcorr. After tons of tests I am still struggling with the correct input and output range. The results deriving from radiance as ...
2
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0answers
38 views

minimum number of pixel points for regression on atmospherically corrected satellite images

I am performing atmospheric correction on a Landsat 8 image using different methods to check which one works best (in order to proceed with further/subsequent analysis). Wondering if it's okay to use ...
2
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0answers
50 views

Issues with using FLAASH on GeoEye data

I am trying to carry out a FLAASH atmospheric correction on radiometricaly corrected GeoEye-1 spatial image (working within ENVI). I am getting the wrong results from my FLAASH correction and believe ...
2
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0answers
161 views

Will Grass GIS 6s atmospheric correction take raster as input for atmospheric parameters

I am working on atmospheric correction using 6s in Grass 6.4.4 version(i.atcorr module). I want to use raster data set for atmospheric parameters. Presently I am creating an icnd (input condition)...
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0answers
99 views

How to determine Visibility Map for Atmospheric Correction

As per Grass wiki: https://grasswiki.osgeo.org/wiki/Atmospheric_correction the atmospheric correction could be done using a visibility raster in conjunction with an elevation raster. With regards to ...
1
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1answer
64 views

Conversion of Landsat ToA reflectance to BoA reflectance with an equation

I am using temporal datasets from Landsat 5, 7 and 8. Since I have many datasets I would like to include the conversion from ToA(top of atmosphere) to BoA(bottom of atmosphere) reflectance into a ...
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0answers
129 views

Planetscope images atmospheric correction

I have downloaded an image which is level 3B processed (so I already have surface reflectance), but my assignment is to compare the data values of the SR file with my results. At first I applied ...
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0answers
69 views

6s atmospheric correction for hyper spectral data

I am trying to customize atmospheric correction for hyper-spectral data. Presently for Landsat I am using the i.atcorr GRASS GIS module. I want to know whether 6S atmospheric correction can be used ...
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0answers
166 views

Age of RTK corrections - fixed solution accuracy

Does anyone know how the age of NTRIP corrections influences accuracy of an RTK solution? I read somewhere that correction loss for few seconds or even a minute may still be acceptable for some ...
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0answers
81 views

Atmospheric correction in ENVI, export to ERDAS

I am working on a project using Hyperspectral imagery and have ERDAS Imagine on my home PC and have access to ENVI on another PC at University. Is it possible, for example, to perform the atmospheric ...
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0answers
337 views

Atmospheric correction using FLAASH

I want to run atmospheric correction on my Landsat TM5 picture using FLAASH (ENVI 4.8) but when I input radiance image (BIL format) into it, then this message is shown: "Enter ASCII filename ...
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0answers
236 views

PCI Geomatica ATCOR error with RapidEye images

I'm doing atmospheric corrections to RapidEye images with ATCOR in PCI Geomatica 2014. However, there are serious salt-and-pepper type errors in the outcome bands 4 and 5. These errors only occur when ...
1
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0answers
85 views

How to determine Grass (i.atcorr) tool control file's “visibility for the aerosol model [km]” value

In Grass, the Atmospheric Correction tool (i.atcorr) reference do not provide information with regards to the parameter "visibility for the aerosol model [km]"stated in the control file.I have ...
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0answers
91 views

How to determine aerosol model value for i.atcorr in GRASS? (Using Aeronet data)

I am trying to conduct atmospheric correction of landsat 8 image using i.atcorr of Grass GIS. In thıs regard, I need to know Aerosol Optical Depth (AOD) as stated in Grass wiki page. I've found some ...
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0answers
423 views

Atmospheric correction using ENVI Flaash

I want to perform atmospheric correction of both Landsat 7 and Landsat 8 data. I am using ENVI 4.5. What scale factor should I choose for Landsat 7 and Landsat 8? Plese suggest.
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11 views

Calculate per pixel Landsat Relative Azimuth Angle (RAA)

Iam Trying to Generate Landsat-8/OLI NBAR images. Given that USGS Landsat-8 Angtool can generate per pixel view_zenith, view_azimuth, sun_zenith and sun_azimuth angle bands. Is Relative Azimuth Angle ...
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0answers
30 views

Calculate per pixel Sentinel-2 Solar and Sensor Angle Views

I am working with Sentinel-2 images and would like to generate per pixel angle bands (view_zenith, view_azimuth, sun_zenith and sun_azimuth). Considering Sentinel-2 SAFE structure, I found that ...
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0answers
31 views

Atmospheric correction of InSAR interefrograms

I am trying to apply GACOS service to correct atmospheric artifacts on InSAR interferogram. In the GACOS manual provided with the GACOS_Ultility example, it is mentioned that data storage of the ...
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0answers
39 views

RapidEye preprocessing Levels 3A and 3B

It is not clear to me yet conversely to Landsat and Sentinel-2 how to preprocesing RapidEye, only levels 3A and 3B. The values of the images in Level 3A and 3B are already in Radiance or are DN? In ...
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0answers
24 views

Is Sentinel-2A Band 8 (NIR band) has been affected by earth water vapor absorption feature?

I am starting working with S2A images. While looking at the bandwidth of S2A NIR band, it seems it has a wider area as Landsat-7 ETM+ NIR band. Previously I worked with L7 ETM+ NIR band and obtained ...
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22 views

Doing atmospheric correction of LISS-IV standard data product?

I have purchased RS-2 LISS-IV Standard Processing Level data. The product type is Geo RPC. Metadata is in IKONOS format. I want to compute surface reflectance from original DN values. What is the ...
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0answers
22 views

Atmospheric correction using ERDAS 2014

There are some questions about atmospheric correction using ERDAS. Is it possible to use the atmospheric corrected satellite image to calculate NDVI and LST using ATCOR of ERDAS? If not, I wonder if ...
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0answers
28 views

Atmospheric correction Spot 6

I'm working with Spot images in QGIS and I want to do an atmospheric correction. I want to know if there exists a method, tutorial or a pluggin to do this. I worked with Landsat previously, but it´s ...
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0answers
341 views

How to do topographic correction of Landsat 8 image in ERDAS?

I am trying to perform a topographic correction of a Landsat 8 image using the C method described in the paper below. I am doing this in ERDAS IMAGINE Spatial Modeler. However, I am not sure how to ...
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0answers
61 views

Scaling factor for atmospheric correction in GEOMATICA

Wondering if there's any one who's familiar with using ATCOR for atmospheric correction in GEOMATICA. What is the best scale factor? I used the default setting and then divided my image by 1000. This ...
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0answers
138 views

atmospheric correction with PCI

I'm not very experienced in this. I am atmospherically correcting Landsat 8 images with ATCOR module in PCI Geomatica. I see that my final output reflectance values are not between 0.1 to 1.0, ...
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1answer
163 views

Is it required to do DOS using Sentinel 2 image for land cover change detections

Sentinel 2 imagery is already ortho-corrected and georeferenced. However I wish to know how important it is to correct further and which correction to carry out.