CLOUD PHYSICS LIDAR for GOES-R Matthew McGill / Goddard Space Flight Center April 8, 2015.
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Transcript of CLOUD PHYSICS LIDAR for GOES-R Matthew McGill / Goddard Space Flight Center April 8, 2015.
![Page 1: CLOUD PHYSICS LIDAR for GOES-R Matthew McGill / Goddard Space Flight Center April 8, 2015.](https://reader035.fdocuments.net/reader035/viewer/2022070414/5697c0201a28abf838cd24c4/html5/thumbnails/1.jpg)
CLOUD PHYSICS LIDARfor GOES-R
Matthew McGill / Goddard Space Flight Center
April 8, 2015
![Page 2: CLOUD PHYSICS LIDAR for GOES-R Matthew McGill / Goddard Space Flight Center April 8, 2015.](https://reader035.fdocuments.net/reader035/viewer/2022070414/5697c0201a28abf838cd24c4/html5/thumbnails/2.jpg)
CPL is a self-contained, autonomous backscatter lidar capable of sustained operation at 20 km.
In operation since 2000.
Over two dozen field campaigns, and many 100’s of flight hours.
Housed in ER-2 forward superpod.
The CPL Instrument
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Saharan dust
boundary layer aerosol
subvisual cirrus cirrus
low-level cumulus convective clouds
Lidar profiling generates a time-height cross-section of the atmosphere,revealing cloud and aerosol structure.
Multiple cloud/layer features can be measured, up to the limit of signalattenuation (O.D. 3-4).
From this data we derive layer boundaries, optical depth, extinction, and depolarization, and at least a coarse discrimination of aerosol type (e.g., smoke, dust, pollution).
CPL Data Example
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1. Summary images for each flight (gif images).
2. Layer boundaries for PBL, elevated aerosol layers, clouds (output available in text file).
3. Optical properties, including- layer optical depth
- layer extinction-to-backscatter ratio (S)- layer extinction profile- layer transmission profile- images for extinction and optical depth- depolarization ratio
All data products are 1 second averages produced from theraw 1/10 second data.
All data products are produced for each wavelength.
In addition, real-time data display using Iridium/Inmarsat permits real-time verification of target acquisition and/or adaptive targeting.
CPL Data Products
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CPL provides high resolution profiling of cloud and aerosol structure, up to the limitof signal attenuation. Data is provided with 30 m vertical resolution and 1 secondtemporal resolution. Higher-level data products, such as optical depth, are also produced.
CPL Data Example
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Combining lidar and radar reveals the whole profile
CPL 532 nm attenuated backscatter ratio: 28 July
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merged profile characterization (green = lidar only; red = radar only; yellow = both)
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merged CPL+CRS normalized signal
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layer finding and typing
extinction profiles
optical depth(total, cloud only,
aerosol only)
Example of CPL Higher-level Data Products
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CPL Data Archived to CPL Web Site
Data available by experiment
http://cpl.gsfc.nasa.gov