Alpha-Log
–
User manual
LSI LASTEM SRL
INSTUM_03388
Page 67 / 116
speed is measured 10 meters above the ground.
The two temperatures are measured at a height of 2 and 10 meters.
Night and day are determined by the measurement of solar radiation. Below 3 W/m
2
is considered
night, while above day.
For more information on Pasquill-Gifford stability classes, refer to
EPA - Method for Estimating Pasquill-
Gifford (P-G) Stability Categories
(October 1993) and
Meteorological Moni-toring Guidance for Regulatory
Modeling Applications
- EPA (February 2000).
To access the configuration:
1.
From
section
Estensions
,
select
Calculation Modules.
2.
Select
Pasquill-Gifford stability
class calculation
and press
[Edit]
.
3.
Set
Enable Pasquill-Gifford
elaboration
to Yes.
Then proceed to fill in the required fields based on the measurements available on the data logger.
The elaboration results are stored in a specific file in ASCII text format (§) and sent to remote reception
systems, as already provided for the statistical elaborated data normally produced by the data logger.
4.2.3.6
Dew point temperature
The calculation of the dew point temperature is based on
UNI EN ISO 7726
. It requires measurements of
temperature and relative humidity of the air.
