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Letter

Calculation of the Overlap Function and Associated Error of an Elastic Lidar or a Ceilometer: Cross-Comparison with a Cooperative Overlap-Corrected System

1
CommSensLab, Department of Signal Theory and Communications, Universitat Politècnica de Catalunya (UPC), 08034 Barcelona, Spain
2
Ciències i Tecnologies de l’Espai-Centre de Recerca de l’Aeronàutica i de l’Espai/Institut d’Estudis Espacials de Catalunya (CTE-CRAE/IEEC), Universitat Politècnica de Catalunya (UPC), 08034 Barcelona, Spain
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(21), 6312; https://doi.org/10.3390/s20216312
Received: 10 September 2020 / Revised: 27 October 2020 / Accepted: 4 November 2020 / Published: 5 November 2020
(This article belongs to the Special Issue Lidar Remote Sensing of Aerosols Application)
This paper establishes the relationship between the signal of a lidar system corrected for the incomplete overlap effect and the signal of another lidar system or a ceilometer for which the overlap function is unknown. Simple mathematical relationships permit the estimation of the overlap function of the second system as well as the associated error. Several overlap functions have been retrieved with this method over a period of 1.5 years with two lidar systems of the Universitat Politècnica de Catalunya, Barcelona, Spain. The error when the overlap function reaches 1 is usually less than 7%. The temporal variability estimated over a period of 1.5 years is less than 11% in the first 1.5 km from the surface and peaks at 18% at heights between 1.7 and 2.4 km. The use of a non-appropriate overlap function in the retrieval of the backscatter coefficient yield errors up to 60% in the first 0.5 km and up to 20% above. View Full-Text
Keywords: elastic lidar; overlap function; cross-comparison; error estimation elastic lidar; overlap function; cross-comparison; error estimation
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MDPI and ACS Style

Sicard, M.; Rodríguez-Gómez, A.; Comerón, A.; Muñoz-Porcar, C. Calculation of the Overlap Function and Associated Error of an Elastic Lidar or a Ceilometer: Cross-Comparison with a Cooperative Overlap-Corrected System. Sensors 2020, 20, 6312. https://doi.org/10.3390/s20216312

AMA Style

Sicard M, Rodríguez-Gómez A, Comerón A, Muñoz-Porcar C. Calculation of the Overlap Function and Associated Error of an Elastic Lidar or a Ceilometer: Cross-Comparison with a Cooperative Overlap-Corrected System. Sensors. 2020; 20(21):6312. https://doi.org/10.3390/s20216312

Chicago/Turabian Style

Sicard, Michaël, Alejandro Rodríguez-Gómez, Adolfo Comerón, and Constantino Muñoz-Porcar. 2020. "Calculation of the Overlap Function and Associated Error of an Elastic Lidar or a Ceilometer: Cross-Comparison with a Cooperative Overlap-Corrected System" Sensors 20, no. 21: 6312. https://doi.org/10.3390/s20216312

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