-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathi.sentinel_1.html
63 lines (53 loc) · 3.33 KB
/
i.sentinel_1.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>i.sentinel_1 toolset - GRASS GIS manual</title>
<meta name="Author" content="mundialis team">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="content-language" content="en-us">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="grassdocs.css" type="text/css">
</head>
<body bgcolor="white">
<div id="container">
<a href="https://grass.osgeo.org/grass-stable/manuals/index.html"><img src="grass_logo.png" alt="GRASS logo"></a>
<hr class="header">
<h2>NAME</h2>
<em><b>i.sentinel_1</b></em> is a GRASS GIS addon toolset that searches, downloads, imports
and preprocesses SAR data from the <a href="https://asf.alaska.edu/">Alaska Satellite Facility</a>
using ESA's <a href="https://step.esa.int/main/download/snap-download/">SNAP</a>
software. If a region is covered by multiple Sentinel-1 GRD tiles, a mosaic can be created.
<h2>KEYWORDS</h2>
<a href="https://grass.osgeo.org/grass-stable/manuals/raster.html">imagery</a>, <a href="https://grass.osgeo.org/grass-stable/manuals/topic_import.html">import</a>, <a href="keywords.html#satellite">satellite</a>, <a href="keywords.html#Sentinel">Sentinel</a>
<!-- meta page description: Toolset for download and processing time series of Sentinel-1 products -->
<h2>DESCRIPTION</h2>
The <em>i.sentinel_1</em> toolset consists of currently four modules:
<dl>
<dt><a href="i.sentinel_1.download_asf.html">i.sentinel_1.download_asf</a></dt>
<dd>searches and downloads SAR data from the <a href="https://asf.alaska.edu/">Alaska Satellite Facility</a>
<dt><a href="i.sentinel_1.import">i.sentinel_1.import</a></dt>
<dd>preprocesses and imports Sentinel-1 GRD SAR data using ESA's <a href="https://step.esa.int/main/download/snap-download/">SNAP</a> software
<dt><a href="i.sentinel_1.mosaic.html">i.sentinel_1.mosaic</a></dt>
<dd>downloads and imports an entire Sentinel-1 GRD SAR coverage for the current region using <a href="i.sentinel_1.download_asf.html.html">i.sentinel_1.download_asf</a> and <a href="i.sentinel_1.import">i.sentinel_1.import</a>
<dt><a href="i.sentinel_1.change.html">i.sentinel_1.change</a></dt>
<dd>extracts areas of change from two Sentinel-1 GRD SAR data time-steps using a user-defined change threshold of backscatter ratio
</dl>
<h2>REQUIREMENTS</h2>
Downloading (<a href="i.sentinel_1.download_asf.html">i.sentinel_1.download_asf</a>):
<ul>
<li><a href="https://aria2.github.io/">aria2</a></li>
<li><a href="https://urs.earthdata.nasa.gov/">NASA Earthdata</a> credentials</li>
</ul>
Preprocessing & importing (<a href="i.sentinel_1.import.html">i.sentinel_1.import</a>):
<ul>
<li>ESA's <a href="https://step.esa.int/main/download/snap-download/">SNAP</a></li>
<li>SNAP-Python (snappy) interface needs to be configured (<a href="https://senbox.atlassian.net/wiki/spaces/SNAP/pages/50855941/Configure+Python+to+use+the+SNAP-Python+snappy+interface">instruction</a>)</li>
</ul>
Mosaicking (<a href="i.sentinel_1.mosaic.html">i.sentinel_1.mosaic</a>):
<ul>
<li>All of the above</li>
<li><a href="i.sentinel.download.html">i.sentinel.download</a></li>
<li><a href="i.sentinel.import.html">i.sentinel.import</a></li>
</ul>
<h2>AUTHORS</h2>
Guido Riembauer and Hajar Benelcadi, <a href="https://www.mundialis.de/">mundialis</a>, Germany