I don't mean simply the data format of these, as that is easy enough to look up. I am referring to what they actually mean, and the units and where they originate.
Looking at a script I have been tasked with amending, it appears radiotap.mactime is the transmission end time of a frame (from which the transmission start time can be determined by subtracting the frame length in octets divided by radiotap.datarate
Generally, are there any up-to-date references that describe all the Wireshark elements in fairly leisurely terms?
A page such as https://www.wireshark.org/docs/dfref/r/radiotap.html is of fairly limited use if one doesn't know what most of the values mean!