January 9, 2013
Following the SCP project, we tested each sonic in a zero-wind enclosure within the EOL temperature chamber, measuring wind component offsets and sonic temperature errors over the nominal range -30 C to 55 C. The following table shows wind component offsets as okay if the u and v offsets are less than +/- 4 cm/s and the w offsets less than +/- 2 cm/s (between - 20 C and 30 C). The sonic temperature corrections are listed as the slope and offset of a linear fit (between -20 C and 30 C), Tc = offset + slope*tc.sonic, where Tc is calculated from temperature, relative humidity, and pressure measured in the zero-wind enclosure.
Sonic |
Location |
Cal date |
u |
v |
w |
tc offset |
tc slope |
|---|---|---|---|---|---|---|---|
0923 |
Ah1 |
|
|
|
|
|
|
0671 cg |
Ah2 |
|
|
|
|
|
|
0743 |
Aph3 |
|
|
|
|
|
|
1120 |
A4 |
|
|
|
|
|
|
0732 |
Ah5 |
|
|
|
|
|
|
0800 |
Ah6 |
|
|
|
|
|
|
0673 |
A7 |
|
|
|
|
|
|
0176 |
Ap8 |
|
|
|
|
|
|
1121 |
Ap9 |
|
|
|
|
|
|
0677 |
Ap10 |
|
|
|
|
|
|
0674 |
Ars11 |
|
|
|
|
|
|
0855 |
Ap12 |
|
|
|
|
|
|
0745 |
A13 |
|
|
|
|
|
|
1124 |
Ap14 |
|
|
|
|
|
|
1122 |
A15 |
|
|
|
|
|
|
0740 |
A16 |
|
|
|
|
|
|
0856 |
A17 |
|
|
|
|
|
|
0744 |
A18 |
|
|
|
|
|
|
0178 |
A19 |
|
|
|
|
|
|
0200 |
C.1m |
6/27/12 |
ok |
ok |
ok |
-0.04 |
1.0192 |
0197 |
C.2m |
7/3/12 |
ok |
ok |
ok |
0.74 |
0.9900 |
|
M.05m |
|
s1 |
|
|
|
|
|
M.1m |
|
s5 |
|
|
|
|
|
M.2m |
|
s9 |
|
|
|
|
|
M.3m |
|
s12 |
|
|
|
|
|
M.4m |
|
s14 |
|
|
|
|
|
M.5m |
|
s16 |
|
|
|
|
|
M.10m |
|
s7 |
|
|
|
|
|
M.20m |
|
s10 |
|
|
|
|