Groundradar has designed a 100 MHz drone GPR system for specific applications where rapid, non-contact, near-surface scanning is required.  The system is currently being tested in South America, but preliminary tests have shown that penetration to 10 m is feasible in suitable soil conditions.  In frozen environments, penetration to beyond 100 m should be possible.  The entire system is designed to be mounted on a low-cost DJI-type drone, and weights 500 g, including RTK GPS rover, antenna and on-board data storage.  The battery will last approximately 4 hours continuously.