Are there any alternatives to remote sensing technology.
http://rst.gsfc.nasa.gov/Front/tofc.html
http://www.sussex.ac.uk/press_office/media/media260.shtml
http://www.freepatentsonline.com/3951134.html
http://www.ottawa.drdc-rddc.gc.ca/docs/e/TEO-TM-2003-233.pdf
http://en.wikipedia.org/wiki/Powerline_communication
http://en.wikipedia.org/wiki/Scalar_energy