Salaam
I was reading an article about Lancet UAVs. Somewhere in the article, it says:
Ukrainian electronic warfare equipment does not interfere with the Lancet’s operation, the low EPR makes it possible to remain undetected by enemy air defence radars,...
I wonder if EPR here refers to Electron Spin Reseonance or Engine Pressure Rate? Since the above-said Lancets don't have jet engines, I thought it latter could not have been intended here.
Thanks in advance for your help.