ASF Sentinel-1 Metadata Download tool
Project description
Small Python tool (asfsmd) that allows to download XML files containing Sentinel-1 products metadata from the ASF archive.
Sentinel-1 products are stored in the ASF arcive as ZIP files that are quite large because they contain both the products annotations and the binary image data.
The asfsmd tool is able to retrieve only the relatively samll annotation files (in XML format) without downloading the entire ZIP archive.
asfsmd exploits Python packages like fsspec or httpio for reading HTTP resources as random-access file-like objects. In order to do it the remote server must support the Range header.
This approach allows to open the ZIP archive remotely, inspects contents, and download only the pieces of data that are actually necessary to the user.
Performnces of this approach are quite poor but, in the specific case of Sentinel-1 products, the entire process results to be faster than downloading the entire ZIP archive and extracting only annotation files.
Command Line Interface
$ python3 -m asfsmd --help usage: asfsmd [-h] [--version] [--loglevel {DEBUG,INFO,WARNING,ERROR,CRITICAL}] [-q] [-v] [-d] [-f] [--urls] [-o OUTDIR] [-u USERNAME] [-p PASSWORD] [--block-size BLOCK_SIZE] [-b {s1,s2,s3,s4,s5,s6,iw1,iw2,iw3,ew1,ew2,ew3,ew4,ew5,wv1,wv2}] [--pol {vv,vh,hv,hh}] [-c] [-n] [-r] [--data] INPUT [INPUT ...] ASF Sentinel-1 Metadata Download tool. Small Python tool (`asfsmd`) that allows to download XML files containing Sentinel-1 products metadata from the ASF archive. Sentinel-1 products are stored in the ASF arcive as ZIP files that are quite large because they comntain both the products annotations and the binary image data. The `asfsmd` tool is able to retrieve only the relatively small annotation files (in XML format) without downloading the entire ZIP archive. positional arguments: INPUT Sentinel-1 product name(s). If the '-f' flag is set then the argument is interpreted as the filename containing the list of products. If the '--urls' flag is set then the arguments are interpreted as URLs pointing to product on the ASF server. See '--file--list' and the '--urls' options for more details. options: -h, --help show this help message and exit --version show program's version number and exit --loglevel {DEBUG,INFO,WARNING,ERROR,CRITICAL} logging level (default: WARNING) -q, --quiet suppress standard output messages, only errors are printed to screen -v, --verbose print verbose output messages -d, --debug print debug messages -f, --file-list read the list of products from a file. The file can be a JSON file (with '.json' extension) or a text file.The text file is expected to contain one product name per line.The json file can contain a list of products or a dictionary containing a list of products for each key.In this case the key is used as sub-folder name to store the corresponding products.Example: <OUTDIR>/<KEY>/<PRODUCT> --urls Indicate the inputs are a list of URLs from ASF. -o OUTDIR, --outdir OUTDIR path of the output directory (default='.') -u USERNAME, --username USERNAME username for ASF authentication. If not provided the tool attempts to retrieve the authentication parameters for the user's '.netrc' file looking for the host 'urs.earthdata.nasa.gov' -p PASSWORD, --password PASSWORD password for ASF authentication. If not provided the tool attempts to retrieve the authentication parameters for the user's '.netrc' file looking for the host 'urs.earthdata.nasa.gov' --block-size BLOCK_SIZE httpio block size in bytes (default: 1024) -b {s1,s2,s3,s4,s5,s6,iw1,iw2,iw3,ew1,ew2,ew3,ew4,ew5,wv1,wv2}, --beam {s1,s2,s3,s4,s5,s6,iw1,iw2,iw3,ew1,ew2,ew3,ew4,ew5,wv1,wv2} Choose only one beam to download. If not provided all beams are downloaded. --pol {vv,vh,hv,hh} Choose only one polarization to download. If not provided both polarizations are downloaded. -c, --cal Download calibration files. -n, --noise Download noise calibration files. -r, --rfi Download RFI files. --data Download measurement files.
License
Copyright (c) 2021-2023 Antonio Valentino
The asfsmd package is distributed under the MIT License.
Project details
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distribution
Built Distribution
File details
Details for the file asfsmd-1.4.1.tar.gz
.
File metadata
- Download URL: asfsmd-1.4.1.tar.gz
- Upload date:
- Size: 17.8 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
- Uploaded via: twine/4.0.2 CPython/3.11.6
File hashes
Algorithm | Hash digest | |
---|---|---|
SHA256 | c89798c25b888288c3ee9f367540d785fc4e1c68336d2ee8400bb14b5672e695 |
|
MD5 | 8d4c9bdc3ffe117c27ae3bc57c178cb9 |
|
BLAKE2b-256 | b0b5a53c3b8cc9f3fa5cacfe3e2ec3b3531b968576e10d74b79bbb6234c568d5 |
File details
Details for the file asfsmd-1.4.1-py3-none-any.whl
.
File metadata
- Download URL: asfsmd-1.4.1-py3-none-any.whl
- Upload date:
- Size: 15.5 kB
- Tags: Python 3
- Uploaded using Trusted Publishing? No
- Uploaded via: twine/4.0.2 CPython/3.11.6
File hashes
Algorithm | Hash digest | |
---|---|---|
SHA256 | 549b2d5084099d50b77509c89d3b26e4bf2470bc548eb2d9db77d8a130fbede8 |
|
MD5 | 6067890768af626020a859eff4e0c2d4 |
|
BLAKE2b-256 | 99d21f6177b281471142a88b9bf436c3f3dca17403713525d9023fe70397a4a5 |