Abstract: The embodiments described herein provide ranging capabilities in RF-opaque environments, such as a jungle, that preclude the use of Global Positioning System (GPS) and/or laser ranging systems, utilizing transponders and Global Positioning System (GPS) receivers located on aerial vehicles. The aerial vehicles operate above the RF-opaque environment, and communicate with a ranging device within the RF-opaque environment on frequencies that propagate in the RF-opaque environment. The ranging device transmits RF signals to the transponders, which are received by the transponders and sent back to the ranging device on a different frequency. The aerial vehicles also provide their coordinates to the ranging device using their GPS receivers. The ranging device uses information about the transmitted and received RF signals and the GPS coordinates of the aerial vehicles to calculate a distance to a property line from the ranging device, and/or to calculate a coordinate location of the ranging device.

Abstract: A system for generating radiant heat in a transit vehicle includes at least one floor panel having at least one heating element disposed therein, and a power switch operably disposed intermediate a power supply source and the heating element for selectively providing and discontinuing a supply of a predetermined power generated by such power supply source to and from such at least one heating element.