Campbell Scientific CSAT3 3-D Sonic Anemometer - Manual (Page 40)

CSAT3 Three Dimensional Sonic Anemometer
;If the CSAT3 head is pointing West of North (above figure),
;theta is negative. If the CSAT3 head is pointing East of
;North, theta is positive.
;
;The site attendant must enter the value of theta. Search
;for the text string "unique value" to find the location where
;theta is entered.
*Table 1 Program
01: .1 Execution Interval (seconds)
;Get the data from the CSAT3.
;
1: SDM-CSAT3 (P107)
1: 1 Reps
2: 3 SDM Address
3: 91 Trigger and Get wind & Ts data
4: 1 Ux Input Location [ Ux ]
;Configure the CSAT3.
;
2: Do (P86)
1: 1 Call Subroutine 1
;Change the CSAT3 Ux and Uy to instantaneous compass wind direction.
;
3: Z=X (P31)
1: 1 X Loc [ Ux ]
2: 11 Z Loc [ Prop_N ]
4: Z=X*F (P37)
1: 2 X Loc [ Uy ]
2: -1 F
3: 9 Z Loc [ Prop_E ]
;Copy the CSAT3 Ux and Uy instantaneous wind to compute CSAT3 wind direction.
;
5: Z=X (P31)
1: 1 X Loc [ Ux ]
2: 10 Z Loc [ Ux_copy ]
6: Z=X (P31)
1: 2 X Loc [ Uy ]
2: 12 Z Loc [ Uy_copy ]
7: Z=ABS(X) (P43)
1: 5 X Loc [ diag ]
2: 36 Z Loc [ diag_abs ]
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