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CALIPSO produces Level 1 and Level 2 science data products that are listed in detail in the CALIPSO Data Products Catalog (PC SCI 503). These products are archived and distributed by the Atmospheric Science Data Center (ASDC).

Simulated LITE data  

Image above: An example of data collected by CALIPSO's lidar in June 2006. The data extends from sea level to 30 km.

For more information on CALIPSO's prospective data products, visit this journal article:

Vaughan, M., Young, S., Winker, D., Powell, K., Omar, A., Liu, Z., Hu, Y., and Hostetler, C. (2004). Fully automated analysis of space-based lidar data: an overview of the CALIPSO retrieval algorithms and data products. Proc. SPIE, 5575, pp. 16-30. [ View Paper]

Table 1 gives a summary of the CALIPSO Level 2 data products and the spatial scales at which the data products are reported. The expected accuracies given are for the maximum averaging distances for which the products will be retrieved.

Cloud products are reported at a horizontal resolution of 5 km; i.e., at the fundamental averaging resolution of the processing scheme. Cloud boundaries, which can be detected at higher resolution, are reported at that resolution. To account for weaker backscatter signals from aerosols, the Level 2 aerosol profile products are reported at a uniform horizontal resolution of 40 km at all altitudes.



Table 1. CALIPSO Level 2 Aerosol and Cloud Measurements
Data Product Measurement Capabilities
and Uncertainties
Data Product Resolution
Horizontal Vertical
Aerosols
Height, Thickness For layers with β > 2.5 x 10-4 km-1 sr-1 5 km 60 m
Optical depth, τ 40% * 5 km N/A
Backscatter, βa(z) 20 - 30% 40 km
40 km
Z < 20 km 120 m
Z ≥ 20 km: 360 m
Extinction, σa 40% * 40 km
40 km
Z < 20 km 120 m
Z ≥ 20 km: 360 m
Clouds
Height For layers with β > 1 x 10-3 km-1 sr-1 1/3, 1, 5 km 30, 60 m
Thickness For layers with τ < 5 1/3, 1, 5 km 60 m
Optical depth, τ within a factor of 2 for τ < 5 5 km N/A
Backscatter, βc(z) 20 - 30% 5 km 60 m
Extinction, σc within a factor of 2 for τ < 5 5 km 60 m
Ice/water phase Layer by layer 5 km 60 m
Ice cloud emissivity, ε ±0.03 1 km N/A
Ice particle size ±50% for ε > 0.2 1 km N/A
Note: * assumes 30% uncertainty in the aerosol extinction-to-backscatter lidar ratio, Sa.

NASA
Last Updated: November 28, 2017
Curator: Charles R. Trepte
NASA Official: Charles R. Trepte

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