1. CLOUD PHYSICS LIDAR for GOES-R Matthew McGill / Goddard Space Flight Center April 8, 2015

2. 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

3. 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 signal attenuation (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

4. 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 the raw 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

5. CPL provides high resolution profiling of cloud and aerosol structure, up to the limit of signal attenuation. Data is provided with 30 m vertical resolution and 1 second temporal resolution. Higher-level data products, such as optical depth, are also produced. CPL Data Example

6. Combining lidar and radar reveals the whole profile CPL 532 nm attenuated backscatter ratio: 28 July 18:16:59 5 10 15 0 Altitude (km) 18:33:00time (UTC)18:22:2018:27:40 1 10 100 atten. backscatter ratio 5 10 15 0 Altitude (km) merged profile characterization (green = lidar only; red = radar only; yellow = both) 0 1 2 3 4 5 layer discrimination 18:16:5918:33:00time (UTC)18:22:2018:27:40 5 10 15 0 Altitude (km) merged CPL+CRS normalized signal 18:16:5918:33:00time (UTC)18:22:2018:27:40 0.0 0.2 0.4 0.6 0.8 1.0 normalized CPL+CRS signal

7. layer finding and typing extinction profiles optical depth (total, cloud only, aerosol only) Example of CPL Higher-level Data Products

8. CPL Data Archived to CPL Web Site Data available by experiment http://cpl.gsfc.nasa.gov