$ 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.