The entrance or hole in the main work scene can be recognized separated and discriminated with the settings of the VDI number in the Edit and Threshold of the surface and volume
The frequency of the radar circuit is capable of recognizing in any situation and the operator or user can use the VDI number in the Edit and Threshold of the surface and size and other settings to find the hole entrance and well
The hole well and entrance have changes in the potential of the magnetization which these changes in the magnetic potential can also be separated and discriminated by the frequency of the radar circuit related to any type of metal detector or finder or ground handy radar or mine detector or ground penetrating radar or antenna metal detector the same long range locator
Source of books by the scientist of electronic sciences of radar Ramin Kaykhosravi with permission