When/How are Kerbnet "?" anomalies calculated?

[It'snorocketscience]

So all probe cores have a random chance to detect "?" anomalies on the Kerbnet Access map, some more than others.

When does the game "roll the dice" for this random anomaly detection chance? Is it done every time the game loads, or every time you turn on Kerbnet Access, or...?

(I wish to know how it works so I can find anomalies quicker without cheats. I personally dislike the randomness factor, and would rather spot the anomaly the first time I fly over them.)

[Admiral Fluffy]

I don't know, but the Probododyne RoveMate has a 100% anomaly detection.

[It'snorocketscience]

6 hours ago, Admiral Fluffy said:

I don't know, but the Probododyne RoveMate has a 100% anomaly detection.

I tried it and the scan radius is tiny, about 10* max. To catch any anomalies it must orbit high above the planet, but then your markers are really, really far off because of this.