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TYPES OF FORMATIONS


Depending on the application, there are three formations possible: trailing, cluster, and Constellation . Remote Sensing Tutorial
  • Trailing formations are formed by multiple satellites orbiting on the same path. They are displaced from each other at a specific distance to produce either varied viewing angles of one target or to view a target at different times. Trailing satellites are especially suited for meteorological and environmental applications such as viewing the progress of a fire, cloud formations, and making 3D views of hurricanes. Notable pairs are with CloudSat , and Terra with Aqua .

  • Cluster formations are formed by satellites in a dense (relatively tightly spaced) arrangement. These arrangements are best for high resolution Interferometry and making maps of Earth. Example: TechMap 21.

    • constellation calls for 24 satellites to be distributed equally for full coverage.]]

  • Constellation formations are satellites evenly dispersed to allow for simultaneous global coverage. A good example of this is the NAVSTAR program that supports GPS . NAVSTAR satellites are evenly spaced in orbit to allow communication for a GPS anywhere on Earth.


Usually, these formations are made up of numerous small satellites. A Micro Satellite weighs under 100kg and a Nano Satellite weighs under 10kg. Magnetosheric Constellation, for instance, would be composed of 100 micro satellites.(see {Link without Title} )

This technology has become more viable thanks to the development of autonomous flying. With an on board computer and this algorithm, satellites may autonomously position themselves into a formation. Previously, Ground Control would have to adjust each satellite to maintain formations. Now, satellites may arrive at and maintain formations with faster response time and have the ability to change the formation for varied resolution of observations. Also, satellites may be launched from different spacecrafts and rendezvous on a particular path. This advance was made possible by Dave Folta, John Bristow, and Dave Quinn at NASA ’s Goddard Space Flight Center (GSFC). Remote Sensing tutorial


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