Author: Krzysztof Markowicz, e-mail kmark@igf.fuw.edu.pl
Date: Last modified, Dec 2025

Device: 
LAS 3341 TSI
Instrument to measure aerosol size distribution between 0.09 and 7.5 micrometer
All data saved in UTC time

Structure of files:
Lev 1.0 raw data includes ASCII files:

Date	Time   	     Accum.	Scatter	Current	Sample	Ref.	Temp.	Sheath	Diff.	Box	Purge	Pres.	Aux.	Flow	90.00	94.11	98.41	102.91	107.61	112.53	117.67	123.04	128.66	134.54	140.69	147.12	153.84	160.87	168.22	175.90	183.94	192.34	201.13	210.32	219.93	229.98	240.49	251.47	262.96	274.98	287.54	300.68	314.42	328.78	343.80	359.51	375.94	393.11	411.07	429.85	449.49	470.03	491.50	513.96	537.44	562.00	587.67	614.52	642.60	671.96	702.66	734.76	768.33	803.44	840.14	878.53	918.67	960.64	1004.53	1050.42	1098.41	1148.60	1201.08	1255.95	1313.33	1373.34	1436.08	1501.69	1570.30	1642.05	1717.07	1795.52	1877.56	1963.34	2053.04	2146.84	2244.92	2347.49	2454.74	2566.90	2684.17	2806.81	2935.05	3069.14	3209.37	3356.00	3509.33	3669.66	3837.32	4012.64	4195.97	4387.68	4588.14	4797.77	5016.97	5246.18	5485.87	5736.51	5998.60	6272.67	6559.26	6858.94	7172.31
yyyy-mm-dd HH:MM:SS  Secs   	Volts	Volts	sccm	Volts	Volts	sccm	Volts	K	sccm	kPa	Volts	sccm	94.11	98.41	102.91	107.61	112.53	117.67	123.04	128.66	134.54	140.69	147.12	153.84	160.87	168.22	175.90	183.94	192.34	201.13	210.32	219.93	229.98	240.49	251.47	262.96	274.98	287.54	300.68	314.42	328.78	343.80	359.51	375.94	393.11	411.07	429.85	449.49	470.03	491.50	513.96	537.44	562.00	587.67	614.52	642.60	671.96	702.66	734.76	768.33	803.44	840.14	878.53	918.67	960.64	1004.53	1050.42	1098.41	1148.60	1201.08	1255.95	1313.33	1373.34	1436.08	1501.69	1570.30	1642.05	1717.07	1795.52	1877.56	1963.34	2053.04	2146.84	2244.92	2347.49	2454.74	2566.90	2684.17	2806.81	2935.05	3069.14	3209.37	3356.00	3509.33	3669.66	3837.32	4012.64	4195.97	4387.68	4588.14	4797.77	5016.97	5246.18	5485.87	5736.51	5998.60	6272.67	6559.26	6858.94	7172.31	7500.00

Lev 1.5 matlab file.
Data from this level includes corrected optical properties.

Data includes data structure with following fields:
 year: year
 month: month
 day: day
 time: time [UTC]
 doy: day of year
 timeMATLAB: matlab format (number of days since Jan 1 of 0)
 r - particle size (middle of bin size)
 dr - range of bin size
 Nbin - number of particle in bin
 Nsize - aerosol size distribution

Lev 2.0 the same structure as the Lev 1.5 data.