No data entered on this site is shared willingly with third parties of any sort, governmental or commercial. A search warrant or subpoena or similar legal request would be needed.
When a copy of the Guide 9.1 star charting software is ordered, your shipping and e-mail addresses and the time at which you ordered are collected. This may be used, for example, to check into why a package didn't arrive. Since payment is through PayPal, I never see your financial information.
Data entered into various forms on this site, such as the GNSS timing tools, satellite identification tool, and on-line Find_Orb, will be stored for a few days (length varies depending on how much use the site is getting; 'a few days' probably overstates matters.) I've occasionally had to dig into the logs to figure out why a service crashed, or an orbit didn't solve or an artsat wasn't identified.
I can be reached at pоç.ötŭlpťсéјôřp@otúlm. If you're a human instead of a spambot, you can probably figure out how to remove the diacritical marks...