It seems you don’t necessarily need new data yet for your project, you can just use previous observations to get the error rate. So perhaps you could just download a bunch of old observations and use those. I have an archive of Dec 2019 observations, some notes about it here:
Also, for past OGG files, you can get them from archive.org, so you don’t have to worry about using too much of SatNOGS’ bandwidth. See for example: