Interesting info, thanks for sharing it piston79.

Digging a bit more on the subject and considering that the VHF radar from the Nebo-M system is an evolution/modification of the 1L119 VHF radar I found the following about the "predecessor" variant of the Nebo-M VHF radar, the 1L119 "Nebo-SVU" VHF radar system:




This info can be found here:
http://www.almaz-antey.ru/en/catalogue/millitary_catalogue/1219/1241/1340


And considering that the targeting precision of the 1L119 VHF radar is 100 meters, it seems that the 90 meter precision data can indeed come from the VHF radar of the Nebo-M system.