Chemical‐Sensing Networks: Satellite‐Based
John C. Hahn · Encyclopedia of Analytical Chemistry · 2000
Abstract This paper addresses preliminary system engineering for a disposable, remote, chemical‐sensing network. This network could interconnect a satellite hub, low‐earth orbiting (LEO) satellites, remote sensors, and a fiber optic (OF) interface that interlinks remote chemical sensors, situated underground in aquifers or directly beneath hazardous chemical/waste sites, with remote transmitter/receivers on the earth's surface. Some critical technical factors: orbital analysis, telemetry, data rates, data structures, digital modulation techniques, antennae selection, remote power considerations, satellite transponder access, and other hardware tradeoffs, are examined in an effort qualitatively to optimize the configuration of a wide area network (WAN). This paper demonstrates the viability of the proposed network, which is suited to the detection of hazardous chemicals in the atmosphere or underground.