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| 
Rigi
-O3-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
Local time +1 |
| Sampling |
| Sampling height |
: |
|
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
1 minute |
| Sampling environment |
: |
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| Description for sampling analysis |
: |
Air Intake: open-face, ambient |
| Instrument and Analysis |
| Measurement method |
: |
Light absorption analysis (UV) |
| Current status and history of instrument |
: |
UV Photometer |
| Description of instrument |
: |
[1991-05-23 thru 1996-03-24] ML8810 (Monitor Labs);
[1996-03-24 thru 2010-01-01] TEI 49C (Thermo Environmental Instruments Inc.);
Since 2010-08-24: Thermo 49i (Thermo Scientific) |
| Calibration |
| Current scale employed in the measurement |
: |
NIST SRP #15 |
| Measurement calibration |
: |
automatic zero and span checks every 25 hrs.; manual zero and span checks every 2 weeks; inter-comparison with a TEI 49C PS transfer standard every 3 months |
| Scale and calibration(treasability) |
: |
NIST SRP #15 |
| Data Processing |
| Measurement unit |
: |
ppbv |
| Data processing |
: |
|
| Processing for averaging |
: |
Processing for Hourly Data:
Estimated standard uncertainty for hourly aggregates:
[1991-05-01 thru 1996-03-24] 1.5 ppbv below 15 ppbv, 5 % otherwise;
[1996-03-24 thru 2004-01-01] 0.9 ppbv below 44 ppbv, 2 % otherwise;
[2004-01-01 thru 2008-01-01] 0.9 ppbv below 58 ppbv, 1.5 % otherwise;
[2008-01-01 thru 2009-01-01] uncertainty = [(0.6028 ppb)^2 + (0.0088 *c)^2]^0.5;
[2009-01-01 thru 2010-01-01] uncertainty = [(0.8190 ppb)^2 + (0.0085 *c)^2]^0.5;
[since 2010-01-01] uncertainty = [(0.8351 ppb)^2 + (0.0086 *c)^2]^0.5
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| Data flag |
: |
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| Data remarks |
: |
SD: If the SD is listed: Instead of the SD (standard deviation), the standard uncertainty is given.
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| Other Information |
| Scientific aim |
: |
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| Reference |
: |
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|
| submitted by Swiss Federal Laboratories for Materials Testing and Research |
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