The cloud imaging and particle size experiment on the Aeronomy of Ice in the mesosphere mission: Instrument concept,design, calibration,and on-orbit performance |
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| Authors: | WE McClintock DW Rusch GE Thomas AW Merkel MR Lankton VA Drake SM Bailey JM Russell |
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| Institution: | 1. Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA;2. Bradley Department of Electrical and Computer Engineering, Virginia Polytechnical and State University, Blacksburg, VA 24061, USA;3. Center for Atmospheric Sciences, Hampton University, Hampton, VA 23668, USA;1. University of Alaska, Fairbanks, USA;2. Virginia Polytechnic Institute and State University, Blacksburg, USA;3. University of Rostock, Kuehlungsborn, Germany;4. University of Rostock, Kuehlungsborn, Germany;5. University of Colorado, Boulder, USA;1. Institute of Physics, Ernst-Moritz-Arndt-University of Greifswald, Felix-Hausdorff-Str. 6, 17489 Greifswald, Germany;2. GATS Inc., Driggs, ID83422, USA;3. Formerly Institute of Physics, Ernst-Moritz-Arndt-University of Greifswald, Germany;1. Space Science Division, Naval Research Laboratory, Washington, DC 20375, USA;2. Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Leopoldshafen, Germany;3. School of Physics, Astronomy and Computational Sciences, George Mason University, Fairfax, VA, USA;4. Laboratory of Atmospheric and Space Physics and Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, USA;5. Center for Atmospheric Sciences, Hampton University, Hampton, VA, USA;6. Department of Earth and Space Sciences, Chalmers University of Technology, Göteborg, Sweden;1. Center for Space Science and Engineering Research, Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA 24060, USA;2. Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA;3. Institute of Physics, Ernst-Moritz-Arndt-University of Greifswald, Greifswald, Germany;4. GATS, Inc., Driggs, ID 83422, USA;5. Laboratory for Atmospheric and Space Physics and Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO 80303, USA;1. Center for Space Sciences and Engineering and Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA, 24061, United States;2. Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, United States;3. GATS Inc., Newport News, VA 23606, United States;4. Computational Physics Inc., Boulder, CO 80301, United States;5. Center for Atmospheric Sciences, Hampton University, Hampton, VA 23668, United States |
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| Abstract: | The Cloud Imaging and Particle Size Experiment (CIPS) is one of three instruments aboard the Aeronomy of Ice in the Mesosphere spacecraft. CIPS provides panoramic ultraviolet images of the atmosphere over a wide range of scattering angles in order to determine the presence of polar mesospheric clouds, measure their spatial morphology, and constrain the parameters of cloud particle size distribution. The AIM science objectives motivate the CIPS measurement approach and drive the instrument requirements and design, leading to a configuration of four wide-angle cameras arrayed in a ‘+’ arrangement that covers a 120° (along orbit track)×80° (across orbit track) field of view. CIPS began routine operations on May 24, 4 weeks after AIM was launched. It measures scattered radiances from PMCs near 83 km altitude to derive cloud morphology and particle size information by recording multiple exposures of individual clouds to derive PMC scattering phase functions and detect nadir horizontal spatial scales to approximately 3 km. This paper describes the instrument design, its prelaunch characterization and calibration, and flight operations. Flight observations and calibration activities confirm performance inferred during ground test, verifying that CIPS exceeds its measurement requirements and goals. These results are illustrated with example flight images that demonstrate the instrument measurement performance. |
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