Passive Ocean Remote Sensing by Near-Space Vehicle-borne GPS Receiver

Abstract

To avoid possible ocean disasters, e.g., the massive 2004 Indian tsunami, effective prediction techniques are required. Inspired by the advantages of near space vehicles, this chapter investigated the system concept of passive ocean remote sensing by near-space vehicle-borne GPS receivers. This system involves placing passive receivers inside a near-space vehicle, which operates in conjunction with GPS illuminators. Rather than emitting signals, it relies on opportunistic illuminators. This is particularly attractive, because it is desirable for such a sensor to provide persistent monitoring but without impacting existing electronic systems. Note that near-space is defined as the space region between 20 km and 100 km, which can offer many new capabilities that are not accessible for satellites and air-planes. The system models, signal processing algorithms, and motion compensation are described, along with technical challenges and possible solutions.