Here is a video showing a piece of equipment VERY similar to what the Nissan team will be using. I'm totally shocked at their lack of sophistication. These folks clearly are amateurs utilizing sub-standard equipment and their results will mean NOTHING! If they can't actually utilize modern equipment instead of stone age tools, they shouldn't harm the field with their sub-standard work.
Here is a link to the actual piece of equipment listed in their abstract.
https://www.linseis.com/filead…s/LINSEIS_STA_PT_1600.pdf
https://www.linseis.com/en/our…rmogravimetry/sta-pt1600/
http://www.sg-instruments.com/linseis/sta-pt1600.html
Obviously, nothing can be determined when such a primitive tool is utilized. And, most likely, since they don't have fifteen dozen PhDs on the project, they don't even have anyone qualified to operate the device.