Appendix C. EasyFlux
®
DL CR6KH20
C-18
TABLE C-14. Station Variables with Descriptions
Station Variable
Units
Default
Description
Name of variable in
Public Table (in
case no CR1000KD
available)
Planar
Fit Beta
≥ 190
&
< 300
decimal
degrees
0
Beta angle used to rotate the
wind when the mean horizontal
wind is blowing from the sector
of 190 to 300 degrees in the
sonic coordinate system (wind
blowing from right and behind
sonic head).
1/
beta_PF_190_300
Footprint
Dist of
Interest
≤ 60
or
≥ 300
m
100
z
The upwind distance of interest
from the station when the mean
horizontal wind is blowing from
the sector of 0 to 60 and 300 to
360 degrees in the sonic
coordinate system (wind blowing
into sonic head).
Note: The program will report
the percentage of cumulative
footprint from within this
distance. The default value is
100 times the aerodynamic
height,
z
. Recall that
z
is the
difference between the
measurement height and
displacement height.
dist_intrst_60_300
Footprint
Dist of
Interest
> 60
&
≤ 170
m
100
z
The upwind distance of interest
from the station when the mean
horizontal wind is blowing from
the sector of 60 to 170 degrees in
the sonic coordinate system
(wind blowing from left and
behind sonic head).
dist_intrst_60_170
Footprint
Dist of
Interest
> 170
&
< 190
m
100
z
The upwind distance of interest
from the station when the mean
horizontal wind is blowing from
the sector of 170 to 190 degrees
in the sonic coordinate system
(wind blowing from behind
sonic head).
dist_instrst_170_190
Footprint
Dist of
Interest
≥ 190
&
< 300
m
100
z
The upwind distance of interest
from the station when the mean
horizontal wind is blowing from
the sector of 190 to 300 degrees
in the sonic coordinate system
(wind blowing from right and
behind sonic head).
dist_intrst_190_300
1/
Leave
all
planar fit alpha and beta angles set to 0 to use Tanner and Thurtell (1969) method of double coordinate rotations.
