The Air Force Research Laboratory, Space Vehicles Directorate (AFRL/RV) has developed the Demonstration and
Science Experiments (DSX) mission to research technologies needed to significantly advance Department of Defense
(DoD) capabilities to operate spacecraft in the harsh radiation environment of Medium-Earth Orbits (MEO). The ability
to operate effectively in the MEO environment significantly increases the DoD's capability to field space systems that
provide persistent global space surveillance and reconnaissance, high-speed satellite-based communication, lower-cost
GPS navigation, and protection from space weather and environmental effects on a responsive satellite platform. The
three DSX physics-based research/experiment areas are:
1. Wave Particle Interaction Experiment (WPIx): Researching the physics of Very-Low-Frequency (VLF) electromagnetic
wave transmissions through the ionosphere and in the magnetosphere and characterizing the
feasibility of natural and man-made VLF waves to reduce and precipitate space radiation;
2. Space Weather Experiment (SWx): Characterizing, mapping, and modeling the space radiation environment in
MEO, an orbital regime attractive for future DoD, Civil, and Commercial missions; and
3. Space Environmental Effects (SFx): Researching and characterizing the MEO space weather effects on
spacecraft electronics and materials.
Collectively, thirteen individual payloads are combined together from these three research areas and integrated onto a
single platform (DSX) which provides a low-cost opportunity for AFRL due to their common requirements. All three
experiments require a 3-axis stabilized spacecraft bus (but no propulsion), a suite of radiation sensors, and extended
duration in a low inclination, elliptical, MEO orbit. DSX will be launch-ready in summer 2010 for a likely launch comanifest
with an operational DoD satellite on an Evolved Expendable Launch Vehicle (EELV).
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