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Lessons learnt during the first Quality Assurance exercise of the ACTRIS high-power lidars

L. BELEGANTE1, C. TALIANU1,2,* , A. NEMUC1, V. NICOLAE1, G. CIOCAN1, F. TOANCA1, O. G. TUDOSE3, C. RADU1, D. NICOLAE1

Affiliation

  1. National Institute of Research and Development for Optoelectronics - INOE 2000, Remote Sensing Department, 409 Atomistilor street, Magurele, PO Box MG-05, Magurele, 077125, Romania
  2. Institute of Meteorology and Climatology, Department of Water, Atmosphere and Environment, University of Natural Resources and Life Sciences, Gregor-Mendel Street 33, Vienna, A-1180, Vienna, Austria
  3. INOESY S.R.L., 8 Fdc. Mestecanis Street, 707410, Valea Lupului, Iasi, Romania

Abstract

This paper presents the results of the first Quality Assurance (QA) exercise under the ATMO-ACCESS pilot, aimed at calibrating and validating ATLID onboard the EarthCARE satellite. The exercise involved 24 high-power lidars from ACTRIS and EARLINET, across 12 countries. Typical problems of the lidar systems, limitations in terms of performances and estimation of the correction factors were extracted from the specific quality assurance tests. Key findings include the identification of typical system limitations and correction factors. Most lidar systems showed full overlap altitudes between 200 and 1000 m, though additional near-range telescopes may be needed to meet ACTRIS standards. The maximum product height retrieved from the tests indicate that the 532 nm and 355 nm channels perform better, with mean maximum altitudes around 16 km, while the 1064 nm channel is limited to 7.4 km. Polarization calibration revealed systematic errors below 0.005 for most of the instruments, supporting reliable aerosol typing, although some instruments showed higher errors..

Keywords

Lidar, Aerosols, Quality assurance, Systematic bias, Measurement uncertainty.

Submitted at: Oct. 3, 2024
Accepted at: Oct. 7, 2024

Citation

L. BELEGANTE, C. TALIANU, A. NEMUC, V. NICOLAE, G. CIOCAN, F. TOANCA, O. G. TUDOSE, C. RADU, D. NICOLAE, Lessons learnt during the first Quality Assurance exercise of the ACTRIS high-power lidars, Journal of Optoelectronics and Advanced Materials Vol. 26, Iss. 9-10, pp. 422-432 (2024)