I know that they mention this concept in their website, and its not that VLF remote sensing of Ionosphere is necessary,but he way they achive a ULF is a major concern and infact a hidden weapon. Now check this: Scientist Dr. Nicholas Begich-: "A super-powerful radiowave-beaming technology that lifts areas of the ionosphere (upper layer of the atmosphere) by focusing a beam and heating those areas. Electromagnetic waves then bounce back onto earth and penetrate everything-living and dead."
