Chapter 3 _________________________________________________________ Ozone Calculation
VAISALA_______________________________________________________________________ 93
Additional Correction Factor (C
ref
)
It might be necessary to scale the ozone measurement values with an
additional correction factor. For instance, if another method (such as
light absorption) is usable for measuring total ozone concentration,
partial pressure values can be corrected to fit the inferred total ozone
value with the total ozone measurement in question.
This can be done in the ground equipment software by modifying one
of the scaling calibration coefficients of the sensor. Preferably, the
Pumping time for 100 ml of air is used for this correction.
t
corrected
= t
×
C
ref
Total Ozone Calculation
Total ozone is the integrated ozone in a column, extending from the
bottom to the top of the atmosphere. Thus, it is the sum of the total
ozone measured from the sounding and the estimated residual ozone
(for example, total ozone after burst).
where
In the software used in Vaisala equipment, the results of total ozone
calculation are in Dobson Units (DU).
For further information on total ozone calculation, see
= Total ozone from the sounding
= Residual total ozone
TOTALOZONE
':
S
':
R
+
=
':
S
:
R
'
