Simple, Accurate, Low-cost RO Science with the Iridium-NEXT Satellite Constellation

Details Simple, Accurate, Low-cost RO Science with the Iridium-NEXT Satellite Constellation Simple, Accurate, Low-cost RO Science with the Iridium-NEXT Satellite Constellation

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa24a..01m&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SA24A-01

Physics

[6969] Radio Science / Remote Sensing, [6994] Radio Science / Instruments And Techniques

Scientific paper

Over the last decade, a disparate collection of GNSS-RO instruments have been measuring the refractivity of the Earth's ionosphere and atmosphere. These measurements have proven to be robust and precise data sets for operational weather, climate and geospace sciences. Future GNSS-RO weather and science will most benefit from a large number of profiles (10000+/day), with lower latency and greater accuracy in the lowest 5 km altitude. For weather, latencies below 90 minutes are required, 30 minutes desired. Space weather latency requirements are more stringent, with 15 minutes being a long sought goal. Climate studies benefit from averaging measurements uniformly distributed over the Earth, acquired over decades, with local time sampling errors minimized by dense coverage or well designed orbits. There's much more of course, because space GNSS science is still nascent but with gathering momentum among the international community. Although individual GNSS-RO instruments are relatively cheap as space hardware goes, growing the measurement density can be costly when a dozen or more are required for a single program. In this presentation, we propose a novel technique for greatly reducing the cost of a constellation of GNSS-RO instruments and discuss the science trade-offs of this approach versus the more traditional GNSS-RO designs.

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