ALCF-CALIBRATE(1)

NAME
alcf-calibrate - Calibrate ALC backscatter.

SYNOPSIS
alcf calibrate <type> [--] <time_periods> <input> <output>

DESCRIPTION
Calibration based the O'Connor et al. (2004) method of lidar ratio (LR) in fully opaque stratocumulus clouds.

Arguments following -- are treated as literal strings. Use this delimiter if the input or output file names might otherwise be interpreted as non-strings, e.g. purely numerical file names.

ARGUMENTS

type
    Lidar type (see Types below).

time_periods
    File containing calibration time periods of stratocumulus clouds in the backscatter profiles (see Time periods below).

input
    Input directory containing NetCDF files (the output of alcf lidar).

output
    Output calibration file.

TYPES

chm15k
    Lufft CHM 15k.

cl31
    Vaisala CL31.

cl51
    Vaisala CL51.

minimpl
    Sigma Space MiniMPL.

mpl Sigma Space MPL.

FILES
Time periods file is a text file containting start and end time (see Time format below) of a time period separated by whitespace, one time period per line:

<start> <end> <start> <end> ...

where start is the start time and end is the end time.

TIME FORMAT
YYYY-MM-DD[THH:MM[:SS]], where YYYY is year, MM is month, DD is day, HH is hour, MM is minute, SS is second. Example: 2000-01-01T00:00:00.

EXAMPLES
Read time periods from time_periods.txt, lidar profiles from the directory lidar and write the calibration coefficient to calibration.txt.

    alcf calibrate time_periods.txt lidar calibration.txt

COPYRIGHT
Copyright © 2019–2024 Peter Kuma, Adrian J. McDonald, Olaf Morgenstern, Richard Querel, Israel Silber and Connor J. Flynn.

BUG REPORTING
Report bugs to Peter Kuma (peter@peterkuma.net).

SEE ALSO
alcf(1), alcf-auto(1), alcf-compare(1), alcf-convert(1), alcf-download(1), alcf-lidar(1), alcf-model(1), alcf-plot(1), alcf-simulate(1), alcf-stats(1)