No.8

Introduction
Data Policy
Data
Documentation
Contact Information



Monte Velho

-O3-

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Station Contact Person(s) Observation Data and Quick Plot

Observation
Category : Air sampling observation
Situation : ongoing
Time zone : UTC


Sampling
Sampling height :
Description : continuous
Sampling and analysis frequency : Continuous
Sampling environment :
Description for sampling analysis : UV absorption


Instrument and Analysis
Measurement method : Light absorption analysis (UV)
Current status and history of instrument : UV photometer with internal ozone generator
Description of instrument : Dasibi
Dasibi 1003PC, UV photometer (automatic analyzer) with internal ozone generator.


Calibration
Current scale employed in the measurement :
Measurement calibration :
Scale and calibration(treasability) :


Data Processing
Measurement unit : ppb
Data processing : The daily and monthly data are calculated from the hourly data with the unit digit =0 or the hundredth digit =0 and the tenth digit = 0 and the unit digit = 6 (hour incomplete)
Processing for averaging : Processing for Hourly Data:
Data averages of 30 s samples.

Data flag : The hundredth digit- Operation mode:
= 0: No calibration or test during the hour.
= 1: Calibration or test during the hour - valid value
= 2: Calibration or test during the hour - invalid value

The tenth digit- Quality check:
= 0: Hourly average acceptable.
= 1: Readings in hour higher than 150 ppb or lower than 0 ppb.
= 2: Hourly average almost constant (+/- 1%) for 8 hours
= 3: Hourly average higher than 140 ppb for more than 8 hours
= 4: Hourly average higher than 100 ppb for more than 10 hours
= 5: Hourly average less than 2 ppb for more than 6 hours

The unit digit-Validation flag:
= 0: Valid value
= 1: Missing value
= 2: Suspicious value
= 5: Invalid value
= 6: Sampling time less than 1 hour
= 7: Average value less than detection limit.
Data remarks :


Other Information
Scientific aim :
Reference :


submitted by Instituto de Meteorologia

The WDCGG is operated by the Japan Meteorological Agency
in collaboration with the World Meteorological Organization