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Data Submission Manual
Submit DataData ReportingTemplatesCategoryAerosolCondensation Particle Counterlevel0    October 1, 2020

The example template given below contains the metadata fields that are commonly included when reporting data related to this specific template. Some of these metadata elements may not be relevant for your data reporting, like AIRS station ID for stations outside North America or the various QA measure data when there is no QA measure for the data. Such metadata elements could be let out. If you want to include additional metadata elements that are not given in the example template, there is a complete list here.  In case of any doubt about such additional metadata, please consult the EBAS team!

Template for Condensation Particle Counter Data - Level 0 

Points to note:

  • Reference pressure and temperature for flows:
    A level 0 file contains the data as provided directly by the instrument. Since most Condensation Particle Counters set their sample flow with a critical orifice, the sample flow rate is normally referenced to instrument internal temperature and pressure. Instrument internal temperature and pressure are measured in the vicinity of the flow control device.
  • Pulse width of particle pulses:
    The pulse width is used to correct the particle concentration for coincident counting events. It should be calibrated regularly with an oscilloscope or suitable data acquisition device, or measured instrument internally.
  • Reference flow for level 0 particle concentration:
    The particle concentration stated in the level 0 file is referenced to the nominal sample flow also given in the file.

Downloading template as text file

You could download the template and start to modify the text with your own metadata. Due to limitations of the online portal we could not provide files with the .nas file extension. So please download the text file and edit, and remember to use the .nas file-extension when you create your datafile: 


* To validate the file, please use the EBAS Submission Tool

Flags commonly used with this format:

A full list of flags could be found here.

Group 0: Valid data

Flag Validity Description
000 V Valid measurement

Group 1: Exception flags for accepted, irregular data

Flag Validity Description
110 V Episode data checked and accepted by data originator. Valid measurement

Group 5: Chemical problem

Flag Validity Description
559 V Unspecified contamination or local influence, but considered valid

Group 6: Mechanical or instrumental problem

Flag Validity Description
640 V Instrument internal relative humidity above 40%

Group 9: Missing flags

Flag Validity Description
980 M Missing due to calibration or zero/span check
999 M Missing measurement, unspecified reason

Template for Data Reporting:

90 1001
Fiebig, Markus; Someone, Else
NO01L, Norwegian Institute for Air Research, NILU,, Instituttveien 18,, N-2027, Kjeller, Norway
Fiebig, Markus
1 1
2008 01 01 2008 06 24
Days from the file reference point (start_time)
1 1 1 1 1 1 1 1 1 1 1
9999.999999 9999.99 9999.99 9999.99 9999.999 9999.999 9999.99 9999.99 999.999 9999999.999 9.999999999999999999999999999999999999999999999
end_time of measurement, days from the file reference point
pressure, hPa, Location=instrument internal, Matrix=instrument
temperature, K, Location=instrument internal, Matrix=instrument
relative_humidity, %, Location=instrument inlet, Matrix=instrument
flow_rate, l/min, Location=sample line, Matrix=instrument, nominal/measured=nominal
flow_rate, l/min, Location=sample line, Matrix=instrument, nominal/measured=measured
temperature, K, Location=CPC saturator, Matrix=instrument
temperature, K, Location=CPC condensor, Matrix=instrument
pulse_width, us, Location=instrument internal, Matrix=instrument
particle_number_concentration, 1/cm3, Measurement uncertainty=5%
Data definition:                          EBAS_1.1
Set type code:                            TI
Station code:                             NO0001R
Platform code:                            NO0001S
Timezone:                                 UTC
Startdate:                                20080101000100
Revision date:                            20080624000000
Component:                                particle_number_concentration
Unit:                                     1/cm3
Matrix:                                   pm10
Period code:                              1y
Resolution code:                          1mn
Sample duration:                          1mn
Laboratory code:                          NO01L
Instrument type:                          cpc
Instrument manufacturer:                  TSI
Instrument model:                         3010
Instrument name:                          TSI_3010_BIR
Instrument serial number:                 100235
Method ref:                               NO01L_CPC_acquisition_lev0_0_0_1
Orig. time res.:                          1mn
File name:                                NO0001R.20080101000000.20080624000000.particle_number_concentration.pm10.1y.1mn.lev0.nas
File creation:                            20170101000000
Station WDCA-ID:                          GAWANO__BIR
Station GAW-Name:                         Birkenes Atmospheric Observatory
Station GAW-ID:                           BIR
Station AIRS-ID:                          [this line is optional]
Station other IDs:                        201(NILUDB)
Station state/province:                   [this is line optional]
Measurement latitude:                     58.380
Measurement longitude:                    8.250
Measurement altitude:                     220m
Station name:                             Birkenes
Station latitude:                         58.383333
Station longitude:                        8.25
Station altitude:                         190.0 m
Station land use:                         Forest
Station setting:                          Rural
Station GAW type:                         R
Station WMO region:                       6
Originator:                               Fiebig, Markus,, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18,, N-2027, Kjeller, Norway
Originator:                               Someone, Else,, Some nice Institute, WOW, Super interesting division, Street 18,, X-9999, Paradise, Noway
Submitter:                                Fiebig, Markus,, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18,, N-2027, Kjeller, Norway
Data level:                               0
Version:                                  1
Version description:                      initial revision, CPC_acquisition_lev0 v.0.0.1
Measurement height:                       4m
Inlet type:                               Impactor--direct
Inlet description:                        PM10 at ambient humidity inlet, Digitel, flow 140 l/min
Humidity/temperature control:             Nafion dryer
Humidity/temperature control description: sample dried to below 40% RH with nafion dryer operated with reduced pressure sheath air
Volume std. temperature:                  instrument internal
Volume std. pressure:                     instrument internal
Detection limit:                          0.001 1/cm3
Detection limit expl.:                    Determined only by instrument counting statistics, no detection limit flag used
Measurement uncertainty expl.:            typical value of unit-to-unit variability
Zero/negative values code:                Zero possible
Zero/negative values:                     Zero values may appear due to statistical variations at very low concentrations
Standard method:                          None
QA measure ID:                            WCCAP-CPC-2015-1
QA date:                                  20151006000000
QA document URL:                          ""
Comment:                                  Concentration raw as provided by instrument assuming nominal sample flow rate
Acknowledgement:                          Request acknowledgement details from data originator
start_time end_time p_int T_int RH nom_flow act_flow T_sat T_con pul_wd conc numflag
0.000694 0.001389 839.40 299.70 2.40 1.000 0.959 295.00 280.00 0.400 6000.000 0.000000000000000000000000000000000000000000000
0.001389 0.002083 9999.99 9999.99 9999.99 9999.999 9999.999 9999.99 9999.99 999.999 9999999.999 0.999000000000000000000000000000000000000000000
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