Had a look just to understand what HRPT stands for. I directly jumped to the section “1.2 What is HRPT” only to find a convoluted explanation already expecting a lot of knowledge. Calling that a beginner’s guide is a slap in the face for someone unfamiliar with the subject.
I then searched the internet and found https://usradioguy.com/hrpt-satellite-tracking-and-capture/. There it states right in the first sentence: “Weather satellite pictures are often broadcast as high-resolution picture transmissions (HRPTs)”. Aha, thanks, that is the tl;dr I was looking for.
I am trying to understand how the coordinates end up in the system. https://www.rwardrup.com/dynamically-mapping-amateur-radio-packet-stations/ suggests that it is an automated process by scanning the system. So, the coordinates must be collected from resources already publicly available, right?
But then I also found https://form.jotform.com/210773558931159 which seems to be a form to manually submit data where coordinates have to be added.
As a general rule: if the information is accessible just by decoding packages sent over the air, then there is no need to add a jitter (assuming some sort of metadata managed by the node owner). If this is not the case, then I see two options: