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 submission of Aerosol Optical Depth Data

Below, you find a file format example that is specific for regular reporting of aerosol optical depth data. 

Points to note:

Clicking on a specific line in the example template will provide a detailed explanation and possible options for each of the metadata elements. Please contact ebas@nilu in case of broken links etc.

  • Most of the information entering the header needs to be collected only for the first submission. For the first submission, it is easiest to copy the example, and to adapt it to your station. However, when "recycling" the header for a new submission, please do make sure that the information is current, and update where necessary.
  • A complete list of EBAS metadata elements and there relevance
Downloading template as nasaames file

Please download the .nas file and edit, and remember to keep the .nas file-extension when you create your datafile:
lev2.nas

Validation and submission:

To validate the file, please use the EBAS Submission Tool

Flags commonly used with this format:

The three main types of flags in EBAS are:

  • V (valid measurement): indicate a special condition at the station, but instrument has operated correctly, the data are therefore considered valid.
  • I (invalid measurement): showing that data are not available (not measured, deleted or if it is no precipitation)
  • M (missing measurement): mainly used for level 0 data to be able to exclude these data when being reprocessed to level 1 and level 2

For data harmonization across the network, the following short list of the flags should be used with this template. It is possible to use several flags at the same time to give detailed information about the data.

Group 0: Valid data
Flag Validity Description
000 V valid data, no flag
Group 9: Missing flags
Flag Validity Description
999 M Missing measurement, unspecified reason
78 1001
Hansen, Georg H.
NO01L, Norwegian Institute for Air Research, NILU, , Instituttveien 18, , 2007, Kjeller, Norway
Kouremeti, Natalia; Kazadzis, Stelios
GAW-WDCA
1 1
2019 01 01 2020 02 18
0.041667
days from file reference point
18
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
99.999999 999 999 999 999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999
end_time of measurement, days from the file reference point
sample_count, no unit, Wavelength=368.9 nm, Statistics=arithmetic mean
sample_count, no unit, Wavelength=412.1 nm, Statistics=arithmetic mean
sample_count, no unit, Wavelength=499.7 nm, Statistics=arithmetic mean
sample_count, no unit, Wavelength=862.2 nm, Statistics=arithmetic mean
aerosol_optical_depth, no unit, Wavelength=368.9 nm, Statistics=arithmetic mean
aerosol_optical_depth, no unit, Wavelength=368.9 nm, Statistics=median
aerosol_optical_depth, no unit, Wavelength=368.9 nm, Statistics=stddev
aerosol_optical_depth, no unit, Wavelength=412.1 nm, Statistics=arithmetic mean
aerosol_optical_depth, no unit, Wavelength=412.1 nm, Statistics=median
aerosol_optical_depth, no unit, Wavelength=412.1 nm, Statistics=stddev
aerosol_optical_depth, no unit, Wavelength=499.7 nm, Statistics=arithmetic mean
aerosol_optical_depth, no unit, Wavelength=499.7 nm, Statistics=median
aerosol_optical_depth, no unit, Wavelength=499.7 nm, Statistics=stddev
aerosol_optical_depth, no unit, Wavelength=862.2 nm, Statistics=arithmetic mean
aerosol_optical_depth, no unit, Wavelength=862.2 nm, Statistics=median
aerosol_optical_depth, no unit, Wavelength=862.2 nm, Statistics=stddev
numflag, no unit
0
46
Data definition: EBAS_1.1
Set type code: TI
Timezone: UTC
File name: NO0058G.20190111003000.20200218225441.sun_tracking_filter_radiometer.aerosol_optical_depth.aerosol.3w.1h.NO01L_PMOD-WRC_PFR-N_TRO.CH04L_optical_transmission.lev2.nas
File creation: 20201211125246
Startdate: 20190111003000
Revision date: 20200218225441
Version: 1
Version description: quality assured, post-calibrated, manually inspected
Data level: 2
Period code: 3w
Resolution code: 1h
Sample duration: 1h
Orig. time res.: 1mn
Station code: NO0058G
Platform code: NO0058S
Station name: Troll
Station land use: Snowfield
Station setting: Polar
Station latitude: -72.016667
Station longitude: 2.533333
Station altitude: 1309.0 m
Measurement height: 1.0 m
Regime: IMG
Component: aerosol_optical_depth
Unit: no unit
Matrix: aerosol
Laboratory code: NO01L
Instrument type: sun_tracking_filter_radiometer
Instrument name: PMOD-WRC_PFR-N_TRO
Instrument serial number: 42
Method ref: CH04L_optical_transmission
Standard method: Sunphotometry_PFR_manual_2009
Humidity/temperature control: None
Humidity/temperature control description: in situ measurement, ambient conditions
Volume std. temperature: ambient
Volume std. pressure: ambient
Detection limit: 0.001 no unit
Detection limit expl.: 0.001 optical depths
Zero/negative values: physically impossible
Originator: Hansen, Georg H., Georg.H.Hansen@nilu.no, Norwegian Institute for Air Research, NILU, ATMOS, P.O.Box 100, , 2027, Kjeller, Norway
Submitter: Kouremeti, Natalia, natalia.kouremeti@pmodwrc.ch, Physikalisch-Meteorologisches Observatorium Davos, PMOD/WRC, WORCC, Dorfstrasse 33, , 7260, Davos Dorf, Switzerland
Submitter: Kazadzis, Stelios, Stelios.Kazadzis@pmodwrc.ch, Physikalisch-Meteorologisches Observatorium Davos, PMOD/WRC, WORCC, Dorfstrasse 33, , 7260, Davos Dorf, Switzerland
Acknowledgement: Request acknowledgement details from WORCC-PMOD/WRC (worcc@pmodwrc.ch)
Comment: Preliminary Calibration
starttime endtime sample_count sample_count sample_count sample_count aerosol_optical_depth aerosol_optical_depth aerosol_optical_depth aerosol_optical_depth aerosol_optical_depth aerosol_optical_depth aerosol_optical_depth aerosol_optical_depth aerosol_optical_depth aerosol_optical_depth aerosol_optical_depth aerosol_optical_depth flag
10.020833 10.061806 999 999 999 999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 0.999
10.062500 10.103472 999 999 999 999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 9.999 0.999

This service has been funded or supported by the Norwegian Institute for Air Research (NILU), the EU research infrastructure ACTRIS (Aerosols, Clouds, and Trace gases Research InfraStructure), the European Monitoring and Evaluation Programme (EMEP).