Title: Tsukuba_lidar_220823.txt

Author(s): Tetsu Sakai(lead and corresponding author, ORCiD: 0000-0001-8916-2695), Masatomo Fujiwara, ORCiD: 0000-0001-5567-4692, Tomohiro Nagai, Osamu Uchino (ORCiD: 0000-0002-8785-5647)

Observation and Data Assimilation Research Department
Meteorological Research Institute, Japan Meteorological Agency
1-1 Nagamine, Tsukuba, Ibaraki 305-0052, Japan
Ph: +81-29-853-8583
Email: tetsu@mri-jma.go.jp
https://www.mri-jma.go.jp/Member/obs/susakaitetsusak_en.html

1.0 Data Set Description
Data version number and date: version 1.0 (2025-05-09)
Data Status: Final (publication-ready, but can still be updated later if needed)
Time period covered by the data: 2022-08-23 19:24:28 - 2022-08-24 00:04:27LST(=UTC+9)
Physical location (including lat/lon/elev) of the measurement or platform: 36.1N, 140.1E, 23 m a.s.l.).
Data Frequency - Frequency of data collection (e.g., 5 minute, hourly, continuous, etc.): Daily
Data source (e.g., for operational data include agency), if applicable: N/A
Web address references (e.g., project web site, etc.), if applicable: N/A
Data set restrictions (i.e., indicate if data set needs to be restricted, requires password protection, contains personal info, description of any licensing, etc.): Please contact Tetsu Sakai (tetsu@mri-jma.go.jp) if you use this data in a paper or presentation.

2.0 Instrument Description
The data was collected by the Mie/Rayleigh lidar operating at a wavelength of 532 nm. The specification and data analysis methods have been described in reference papers listed in 5.0.
Specifications (i.e., accuracy, precision, frequency, resolution, etc.): Please see the papers above.

3.0 Data Collection and Processing
Description of data collection, derived parameters and processing techniques used, quality assurance and control procedures, intercomparisons are given in the reference papers listed in 5.0.

4.0 Data Format
Data file structure: column delimited ASCII
File naming conventions: TsYYMMDDdaily.txt (YYYY is year, MM is month, DD is the day of the measurement)
Data format and layout (i.e., description of header/data records, sample records)
L1: Lidar name and location
L2: Measurement period in LST (=UTC+9)
L3: List of parameters:
Altitude(km): Altitude in km asl.
BSR532(dimensionless): Backscattering ratio at 532 nm
VDR(dimensionless): Volume depolarization ratio at 532 nm
PDR(dimensionless): Particle depolarization ratio at 532 nm
dBSR532, dVDR, and dPDR: Estimated uncertainties of the parameters above (dimensionless).

5.0 References
Fujiwara, M., T. Sakai, T. Nagai, K. Shiraishi, Y. Inai, S. Khaykin, H. Xi, T. Shibata, M. Shiotani, and L. L. Pan (2020): Lower-stratospheric aerosol measurements in eastward shedding vortices over Japan from the Asian summer monsoon anticyclone during the summer of 2018, Atmospheric Chemistry and Physics, 21 3073-3090, http://dx.doi.org/10.5194/acp-21-3073-2021.

Sakai, T., O. Uchino, T. Nagai, B. Liley, R. Querel, I. Morino, Y. Jin, T. Fujimoto, E. Oikawa, N. Oshima, 2025: Stratospheric aerosol backscatter and depolarization ratio observed with ground-based lidar at Tsukuba, Japan, and Lauder, New Zealand. J. Geophysical Research: Atmosphere, 130, e2024JD041329, https://doi.org/10.1029/2024JD041329.