Questions tagged [esa]

ESA is an abbreviation for the European Space Agency

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0answers
31 views

Sentinel-3 scaling factor in Google Earth Engine

Does anybody know how to use the scaling factors from Google Earth Engine with Sentinel-3 dataset? The band values provided in ee.ImageCollection("COPERNICUS/S3/OLCI" by default (GEE, orange)...
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1answer
30 views

How can I know which Sentinel Tile is further north?

Sentinel divides the planet surface into tiles, represented in the figure below. I was wondering if there is a programmatic way to compare two of those tile ids and "calculate" which is ...
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26 views

How to write natural logarithm in SNAP software

I want to compute the temperature of a band using the equation: where L(6) is Band 6 of a Raster file and K1 and K2 are constant. I am using Band Math to perform conversions. However I could not find ...
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1answer
15 views

Projects using compatible Sentinel-2 and Landsat-8 reflectance data

Right from the beginning on the Senintel-2 Satellites were constructed to harmonize with the Landsat-8 products in terms of their spatial and spectral capabilities. What I wonder is, if there are ...
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0answers
67 views

SAR calculating distance between 2 points

I am playing around with ESA's SNAP software and Sentinel-1 data and I was curios if it is possible to measure the ground distance between 2 points in a radar image. For example let's say that I am ...
4
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1answer
73 views

Sentinel-1a real azimuth resolution

I was exploring this satellite's payload characteristics on ESA's website and I saw that it's azimuth resolution varies a lot. For example azimuth resolution for IW mode is 22m (https://sentinel.esa....
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2answers
84 views

Which time format does ESA use for Sentinel-3 file names?

regarding the ESA Sentinel-3 file name convention I have got a question; which time zone (GMT, CEST, ...) does ESA use? I could not find anything yet, even it should be a critical point for many users....
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0answers
335 views

Reprojection problem in SNAP (ESA)

I am trying to do a RBR (Relative Burn Ratio) and for this, I am using two Sentinel 2 L2A images (before and after the fire). The native CRS of the data is EPSG:32634 - WGS 84 / UTM zone 34N - ...
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1answer
227 views

Limit to download images from Open Access Hub [closed]

I am running a code https://github.com/diogocaribe/harpia/blob/dev/app/SentinelDownloadTile.py to download all files of Sentinel 2 from my area of interest. However, now a days the download doesn't ...
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1answer
119 views

Which version of Sen2Cor is used by the ESA?

I'm trying to find out which version of the Sen2Cor processor was used by the ESA to process a Sentinel L2A product for a specific date. The latest version is Sen2Cor v2.8 which was published this ...
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1answer
80 views

What causes difference between two sources?

I have downloaded ESA global land cover tiff file and opened it with QGIS 3.6. To measure Africa separetly I used polygon file of this continent as a mask. I got the result that total area of Africa ...
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0answers
404 views

Zooming in to area using Copernicus Open Access Hub?

I can pan but I cannot zoom in when using the Copernicus Open Access Hub. This makes it difficult to order data. I need to know how to zoom in on an area. I know how to zoom to a product. ...
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0answers
45 views

Gravity map GOCE

I'm trying to produce a gravity map out of some GOCE (Gravity field and steady-state Ocean Circulation Explorer) data I downloaded from ESA's (European Space Agency) GOCE archive. I'm trying to follow ...
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1answer
110 views

Changes in extent in sentinel image while calibration with snap tool

i have a problem with the extents of my sentinel 1 image, actually as shown in the image above, am selecting the frame 1 to download from ESA, when i process the snap tool to calibrate i only get the ...
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1answer
112 views

Importing AWS downloaded Sentinel-2 data into SNAP software?

I have downloaded Sentinel-2 L1C granules from AWS. I saved it as .SAFE format and now have for each tile downloaded as folder structure: AUX_DATA IMG_DATA QI_DATA i would like to run some ...
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1answer
108 views

Land cover change - need help with land cover classes

I'm very much new to using ArcGIS and to this forum. For my thesis, I have a raster map of Indonesia where I only look at three types of land cover retrieved from the ESA-CCI dataset. These involve: ...
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0answers
373 views

Apply Orbit File in snap for PALSAR 2 data

I am using snap software for PALSAR 2 data. Thinking of orbit correction using the Apply Orbit File in the radar tool. But in the processing parameter, under the Orbit State Vectors we do not have any ...
5
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3answers
244 views

Can a satellite go over the same area in different passes overtime

Can a sun-synchronous satellite (let's consider Sentinel-1) go over the same place, one time in an ascending pass and the next time (or few times after) in a descending pass?
2
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1answer
415 views

Get resolution and whether right/left looking from sentinel metadata

Is it possible in Sentinel hub products to know the resolution of the product and whether the SAR was right or left looking at the scene? I know that it's possible to know if the SAR was operating in ...
1
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1answer
2k views

Extract Differential Interferometry from SENTINEL-1 image

I downloaded some SLC images from scihub.esa.int . And I want to extract Differencial Interferometry from them by using SNAP-ESA software. How can I do it ?
5
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3answers
4k views

How to download products from ESA's scihub using OData protocol?

How one can download files programatically using scihub OData protocol and cURL (or other library/program)? You can get a descriptive xml response of the API for a dataset can be obtained by this ...