I downloaded an SLC S1B file for March 31st, 2021 from the ASF Data Search Vertex site https://search.asf.alaska.edu/#/?zoom=3.000¢er=-97.494,39.673. I brought it into SNAP to run S1 TOPS coregistration on it iwith another file from February 2021. When I add the March 31st file to the “Read(2)” tab I get the below error message:
I tried going to the mentioned website https://qc.sentinel1.eo.esa.int/ but the site could not be reached. I searched in the Step Forum for similar problems, looks like most of the time this was an issue of the data file being less than 21 days old, but it is June now so the file is at least 2 months passed processing by now.
I did find this website from another discussion https://scihub.copernicus.eu/news/News00323 which lead me to https://scihub.copernicus.eu/gnss/#/home, where it looks like I can download orbit files. I found an orbit file from S1B under the product type AUX_POEORB that matched my files date of march 31st, 2021
I followed SNAP’s error instruction of placing it in the following path under my username
then closed out of SNAP, reopened it, tried to run the coregistration again but got the same error message.
Is there a step I am missing in this process?