Reading Sentinal-1 Metadata in Python

mirza.waqar · March 30, 2021, 5:18am

Is there any python library that can be used to access Sentinal-1 Metadata in python? I am especially interested in Orbit State Vectors and Doppler Centroid Coefficients.

Regards

panjibrotoisworo · March 30, 2021, 5:49am

I used element tree. You can see a sample in my script where I access Sentinel-1 metadata to map the TOPS Split data.

import xml.etree.ElementTree as ET

# Read data
tree = ET.parse('my_metadata.xml')

Sample in my script:

github.com

pbrotoisworo/s1-tops-split-analyzer/blob/main/stsa.py#L118


            target_file = item
    if not target_file:
        raise Exception(f'Found no matching XML file with target subswath "{target_subswath}" and target polarization "{target_polarization}". Check TopsSplitAnalyzer.metadata_file_list for possible matches.')
    # Open XML
    metadata = self.archive.open(target_file)
    self._metadata = metadata
    self._check_metadata_loaded = True
def _parse_location_grid(self):
    """
    Parse the XML metadata and get the coordinate data stored in geolocationGrid
    """
    tree = ET.parse(self._metadata)
    root = tree.getroot()
    # Get subswath and burst coordinates
    lines = []
    coord_list = []

mirza.waqar · March 30, 2021, 5:53am

Many thanks I will try it now.

wmitchell93 · September 1, 2023, 9:37am

Hi,

I am also really interested in reading the metadata of a Sentinel-1 product (S1_IW_GRD) in python. In SNAP it is possible to get an interpolated map of the incident angle (attached image) from the tie-point grids but doing it in SNAP isn’t scalable enough for my application - I have 100s of tiles. Is it possible to read the incident angle directly from the metadata?

Any help would be awesome, thanks!