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CALIPSO Status

CALIPSO Status. Carl Weimer - Ball Aerospace & Technologies Corp. Mike Cisewski, Yongxiang Hu, Bill Hunt, Chip Trepte, Dave Winker – NASA LaRC Floyd Hovis - Fibertek Corp. CALIPSO –Introduction. CALIPSO Satellite Proteus Spacecraft from (CNES/Alcatel) Payload (NASA/CNES/Ball Aerospace)

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CALIPSO Status

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  1. CALIPSO Status Carl Weimer - Ball Aerospace & Technologies Corp. Mike Cisewski, Yongxiang Hu, Bill Hunt, Chip Trepte, Dave Winker – NASA LaRC Floyd Hovis - Fibertek Corp. Ball Aerospace & Technologies Corporation - cweimer@ball.com

  2. CALIPSO –Introduction • CALIPSO Satellite • Proteus Spacecraft from (CNES/Alcatel) • Payload (NASA/CNES/Ball Aerospace) • CALIPSO Payload Instruments • Wide Field Camera – Cloud Camera matched to MODIS (645 nm, 125 m pixel) • Infrared Imaging Radiometer – Three band Thermal Images (8.65, 10.6, 12.05 µm) • CALIOP – Rayleigh-Mie Lidar (laser radar) for clouds and aerosols • CALIOP • Two Wavelengths (532 nm and 1064 nm) • Polarization sensitive at 532 nm (Photomultiplier Detectors aligned Parallel and Perpendicular to laser linear polarization) – Polarization Accuracy ~0.5% • Polarization insensitive at 1064 nm (single Avalanche Photodiode detector) • Sensitive to single photons at 532 nm, less sensitive at 1064 nm • Dynamic range 8 million • Vertical Resolution 30 m fixed by Analog-to-Converter clock (increases in steps to 300 m in stratosphere) • Data collected for altitudes -2 km to +40 km • Laser Footprint on ground 70 m, geolocated to better than 60m • Laser pulse emitted at 20 Hz repetition (330 m spacing between laser pulses) Ball Aerospace & Technologies Corporation - cweimer@ball.com

  3. CALIPSO Satellite & Payload Lidar Receiver Telescope Star Tracker Assembly Wide Field Camera Imaging Infrared Radiometer Integrated Lidar Transmitter Ball Aerospace & Technologies Corporation - cweimer@ball.com

  4. Lidar Core – Transmitter and Receiver Etalon Filter Adjustable Boresight Mechanism APD PMTs Laser Radiator Optical Bench Laser Optics Modules - Fibertek Telescope – 1 meter Beryllium Beam Expander Optics ILT (Integrated Lidar Transmitter) ILR (Integrated Lidar Receiver) Ball Aerospace & Technologies Corporation - cweimer@ball.com

  5. CALIPSO Laser StatusAlways the First Questioned Asked • Completed One Billion Laser Shots On-Orbit Feb 3! • Only have operated one laser, second laser held in reserve. Ball Aerospace & Technologies Corporation - cweimer@ball.com

  6. CALIPSO Summary • Satellite and Payload are healthy, data trends are all acceptable to meet full mission requirements • Mission complete in May 2009, Mission extension will be applied for in January 2009 • “Single String” Satellite and many new technologies as part of this “Pathfinder” mission requires careful risk management throughout program life. • Level 2 Science Data now being released (see http://www-calipso.larc.nasa.gov/products/) • Includes extinction for the first time • See Dave Winker’s Working Group presentation from Feb 2007 for examples of aerosol and cloud science data. • Validation and Calibration work is ongoing • New Data Products and capabilities are being developed • Now providing an Expedited Data set for Science Campaigns • Working to decrease data latency to support weather and air quality users. • New Products include ocean subsurface and altimetry demonstrations (Yong Hu) Ball Aerospace & Technologies Corporation - cweimer@ball.com

  7. One New Application of CALIPSO - Ocean Windspeed • The Cox-Munk Equation relates ocean wind speed to surface reflectivity • Was applied previously to LITE space-based lidar data by Menzies, Tratt, and Hunt • Yong has submitted a paper showing global comparison of passive microwave system AMSR-E on Aqua to CALIPSO measured Ocean Windspeed • Preliminary results show agreement is better than 1.3 m/s rms using single laser shots • Trades – • Microwave systems give superior all-weather performance • CALIPSO measures over much smaller footprint (70 m vs. 20 km) • CALIPSO is calibrated using reflectivity from upper atmosphere • Working towards using ocean surface as an independent lidar calibration and also as independent check on column aerosol extinction. Ball Aerospace & Technologies Corporation - cweimer@ball.com

  8. AMSR-E Winds vs CALIPSO Winds Ball Aerospace & Technologies Corporation - cweimer@ball.com

  9. Global Comparison Between CALIPSO and AMSR-E (AQUA) Wind speeds Residual Windspeed Error for CALIPSO arises from aerosol loss. Possible instrument effects being studied. Ball Aerospace & Technologies Corporation - cweimer@ball.com

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