Questions tagged [sentinel-1]

Remote sensing satellites with a C-band synthetic aperture radar sensor.

Filter by
Sorted by
Tagged with
5
votes
2answers
6k views

Export each image from a collection in Google Earth Engine

I am trying to export each image in a filtered stack of Sentinel-1 images and cannot seem to get it right. Think link suggests using imageCollection.map() and a custom function (such as a geometric ...
6
votes
1answer
2k views

Mosaicking a Image Collection by Date (day) in Google Earth Engine

I have an image collection of Sentinel-1 data over 3 years filtered by a region of interest that spans 3-4 tiles, and want to know the best way to mosaic all the images (tiles) that were taken on the ...
5
votes
2answers
834 views

Why does the resolution decrease with increasing incidence angle in the Sentinel-1 SAR sattelite

On this link (Sentinel1 webpage for a SLC product), the resolution is written as a range from the highest corresponding to low incidence angle, to the lowest resolution corresponding to high incidence ...
1
vote
1answer
209 views

Getting weekly mean composite in Google Earth Engine?

I am currently working on a time-series in Google Earth Engine. Iam still quite inexperienced, especially when it comes to functions. I want to extract the mean values of Sentinel1-images for each ...
10
votes
5answers
25k views

Free radar (SAR) satellite data [closed]

I'm looking for free (non-commercial use) sources of radar (SAR) satellite imagery. Does anyone know of sources?
5
votes
3answers
3k 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 ...
1
vote
1answer
1k views

Why is azimuth resolution worse than range resolution in Sentinel1 (SAR) [duplicate]

Why is the azimuth resolution in Sentinel (SAR sensor) worse than the range resolution? The table in this link gives the resolution for SLC products aquired in the different aquisition modes. In ...