First of all, congratulations for your great work
I am facing a problem. When trying to apply the orbit correction to a Sentinel-1 image trough gpt, the restituted orbit cannot be downloaded from https://qc.sentinel1.eo.esa.int. However, I have checked that, indeed, the orbit file exist.
As I am downloading it behind a corporative proxy, the main suspect was a configuration issue. However, I set the -Dhttps.proxyHost and -Dhttps.proxyPort (everywhere), and still nothing. Note that the proxy does not require user authentication.
After checking the differences with chrome and gpt (using wireshark), it seems that the connection to https://qc.sentinel1.eo.esa.int is done directly, not through the configured proxy. However, chrome was requesting the file through the proxy.
I could find the code where the connection is done, but I am not a java expert, I am sorry. However, let me know if I can provide you with more information.
Thanks in advance