I have been searching for a video to show how the spike is driven into the soil. A friend and fellow detectorist shared the following news article with me. In a pleasant surprise I learnt that the spike device was designed by an Australian. Super cool. It is shown at the 1 minute 25 second mark in the video in this article.
https://www.smh.com.au/world/europe...a-mission-to-master-mars-20181126-p50ic4.html
https://www.smh.com.au/world/europe...a-mission-to-master-mars-20181126-p50ic4.html