Camera Prior Settings

Hello,

I’m doing some work with underwater images and I’m getting a banana effect on the solution. I have INS data, which should be in the cm range for X,Y,Z and tilt values that should be within 5 degrees. I’ve loaded these flightlogs in and it looks like the settings may have changed slightly since they were discussed in threads I have found here. I have some questions regarding Camera Prior Settings:

Position X accuracy - this states that it is measured in the coordinate system value, so is it the accuracy in meters (less being more accurate) or is it a weighted value (higher = more accurate)?

Position Prior Hardness - is there a value in which the program will take these values as absolute?

When I run the process with an extremely high Camera Prior Hardness, I still see the orange lines vary from the supplied locations, why does this happen?

Which accuracy does the program use if you give accuracies in the flightlog import menu as well as the camera prior settings?

If I have pre-existing components and align again, will the program use positions of the old components, or will it start from scratch? I ask because I’m trying to compare results to determine what each setting does and although I see some variation, it isn’t what I would expect.

I’ve tried every combination of settings I can think of but for some reason the program ignores the camera prior settings. You can see the variation from the flightlog position with the orange line, but no matter what settings I use here, I am unable to get it to use these positions.