1. Ball Aerospace & Technologies Corporation - cweimer@ball.com
CALIPSO Status
Carl Weimer - Ball Aerospace & Technologies Corp.
Mike Cisewski, Yongxiang Hu, Bill Hunt, Chip Trepte, Dave Winker – NASA LaRC
Floyd Hovis - Fibertek Corp.
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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, 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)
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3. CALIPSO Satellite & Payload
Lidar Receiver Telescope
Star Tracker Assembly
Wide Field Camera
Imaging Infrared
Radiometer
Integrated Lidar Transmitter
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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)
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5. CALIPSO Laser Status Always 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 -

6. Ball Aerospace & Technologies Corporation - cweimer@ball.com
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
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)
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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 -

8. AMSR-E Winds vs CALIPSO Winds
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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 -