Investigation of Satellite Constellation Configuration for Earth Observation Using Sierra Nevada Dream Chaser~? Spacecraft Following Launch to ISS

摘要

We present here initial results from an investigation into the use of multiple Sierra Nevada Corp. Dream Chaser? platforms, following their launch to the International Space Station, as a distributed constellation for remote sensing and disaster response. The payload capability and AV capacity of these spacecraft, combined with their reusability and prior launch to ISS under a commercial cargo delivery contract, presents a unique and compelling method to provide significant global earth observation during quiescent times, as well as the ability to respond rapidly - including through useful spacecraft maneuvering - when disasters strike around the globe. Our paper documents initial orbital dynamics calculations, optimizations, and alternatives for a variety of on-board constellation configurations. We explore ground coverage and various response modalities when presented with specific-case disasters across the surface of the globe.