Questions tagged [aster]

ASTER is the Advanced Spaceborne Thermal Emission and Reflection Radiometer, an imaging instrument on the satellite Terra.

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ASTER mineral indices with VINR and SWIR data

I need to run a supervised classification on ASTER data in order to map a rock formation, which is composed of chert. There is no shortage of indices which can be used to highlight silica rich ...
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How to get property of each image in a collection in google earth engine?

I am trying to convert ASTER image from DN values to reflectance. For this I require gain coefficient of each image in the collection I have gathered. //Defining geometry var geometry = ee.Geometry....
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226 views

ASTER DEMs multidirectional hillshades

I am trying to produce a multidirectional hillshade from ASTER DEMs in QGIS. basically I am trying to achieve something similar to this which is a screenshot from this layer https://services....
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0answers
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Filling missing pixels of ASTER DEM

I need to perform hydrological analyses and map design purposes (hillshade creation) on a region far north. It is too northern to be covered by the SRTM DEM, therefore I am using the ASTER DEM. ...
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35 views

Evaluating tree model height before and after fire in QGIS?

I have downloaded ASTER images of one area in Aosta Valley. In 2008 fire occured. I have images from 2006 to 2016. How can I estimate the vegetation, precisely tree height before and after the fire?
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131 views

Calculating aspect in flat areas in ASTER DEM with ArcGIS for Desktop?

I have an analyzed aspect surface from ASTER DEM 30m resolution in ArcGIS 10.2. But it shows many aspects in flat area.Normaly it must calculate this are as flat (-1). How can I resolve this problem?
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135 views

Reading L1B ASTER in GRASS using r.in.aster

I'm having a problem getting an ASTER L1B to be read in GRASS using r.in.aster. The output the command shows this: (Wed Apr 8 17:49:03 2015) Command finished (1 sec) (Wed Apr 8 17:49:37 2015) ...
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0answers
357 views

Best band ratios in Aster data?

I am interested in the determination of lithology by using ASTER band ratio. I try to a lot of band ratio (for example RGB 4/8, 4/2, 8/9) but I didn't get a good result. Do you think what is the best ...
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244 views

Aster L1T: Radiance -product to surface reflectance

Earth Engine provides access to Aster level 1 Precision Terrain Corrected Registered At-Sensor Radiance -product (Aster L1T). I would be interested to reach the surface reflectance values of the image ...
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67 views

Downloading Aster level 1T product?

When I try to download Aster level 1T data from the USGS Earth Explorer site it asks me to enter my username and password over and over when I click on download link of my desired product. What ...
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50 views

Finding sericite alteration in ENVI 5.3 spectral library?

I work on an area where there is a sericite alteration and i searched for the sericet and did not find a word. I want to know what is called sericet in the spectral library of ENVI 5.3? Sericite is ...