What type of antenna is this?
The white box antenna in the middle is a multi-band cellular crossed-pol antenna, probably used by a cell phone modem. X-POL-2-5G. Note the twin coaxial cable leading from the antenna, for MIMO.

The small conical thing on the right is a GPS antenna - something like this one from PCTEL?

The centre rod could be a collinear antenna in a fibreglass radome, or just a lightning conductor, the way it runs continuously down to the bottom of the photo.
The Yagi on the right is for VHF, perhaps the high end of the &quot;high band&quot;, say 170 MHz, it's hard to get the scale right. Elements are removeable for transport so it's fairly big.
The left hand stalk holds an ultrasonic anemometer / wind direction sensor, possibly combined with other weather instruments.
I can't speculate on its purpose, but it looks like the owner has built just one or two of these towers, not 10 or 20.