Hi Bonnie,

Thanks for your quick response.

Pardon me if I am stretching this a bit more. The obtained 180 degrees horizontal angle is not user-defined. TurbSim itself calculates the horizontal angle to be 180 or -180 regardless, and flips the sign of u and v components.

For a TIMESR input (rotated to align with mean wind speed) as below:

```
-------------------------------------------------------------------------------
3 nComp - Number of velocity components in the file
1 nPoints - Number of time series points contained in this file (-)
1 RefPtID - Index of the reference point (1-nPoints)
Pointyi Pointzi !nPoints listed in order of increasing height
(m) (m)
0 18
--------Time Series-------------------------------------------------------------
Elapsed Time Point01u Point01v Point01w
(s) (m/s) (m/s) (m/s)
0.1 -5.806484029 0.100666024 -0.242708658
0.2 -6.301078609 0.290001668 -0.370310318
0.3 -6.75458697 -0.063503114 -0.389266782
0.4 -6.547569542 0.435988997 -0.80832477
0.5 -6.517950056 0.333349982 -0.807086687
0.6 -6.499797305 0.670912377 -0.913255718
0.7 -6.142139199 0.217008003 -1.005233562
0.8 -6.226535913 0.524925048 -1.115689118
0.9 -6.367628352 0.597918712 -0.907731109
1 -6.422405581 0.803196742 -1.016948583
1.1 -6.734515723 0.714260691 -0.923066852
1.2 -6.716362971 1.051823086 -1.029235881
```

Turbsim Settings:

```
--------Turbine/Model Specifications-----------------------
19 NumGrid_Z - Vertical grid-point matrix dimension
19 NumGrid_Y - Horizontal grid-point matrix dimension
0.1 TimeStep - Time step [seconds]
600 AnalysisTime - Length of analysis time series [seconds] (program will add time if necessary: AnalysisTime = MAX(AnalysisTime, UsableTime+GridWidth/MeanHHWS) )
"ALL" UsableTime - Usable length of output time series [seconds] (program will add GridWidth/MeanHHWS seconds unless UsableTime is "ALL")
18 HubHt - Hub height [m] (should be > 0.5*GridHeight)
12 GridHeight - Grid height [m]
12 GridWidth - Grid width [m] (should be >= 2*(RotorRadius+ShaftLength))
0 VFlowAng - Vertical mean flow (uptilt) angle [degrees]
0 HFlowAng - Horizontal mean flow (skew) angle [degrees]
--------Meteorological Boundary Conditions-------------------
"TIMESR" TurbModel - Turbulence model ("IECKAI","IECVKM","GP_LLJ","NWTCUP","SMOOTH","WF_UPW","WF_07D","WF_14D","TIDAL","API","USRINP","TIMESR", or "NONE")
"PK_Ext_45_18112_Rot.inp" UserFile - Name of the file that contains inputs for user-defined spectra or time series inputs (used only for "USRINP" and "TIMESR" models)
"2" IECstandard - Number of IEC 61400-x standard (x=1,2, or 3 with optional 61400-1 edition number (i.e. "1-Ed2") )
"24" IECturbc - IEC turbulence characteristic ("A", "B", "C" or the turbulence intensity in percent) ("KHTEST" option with NWTCUP model, not used for other models)
"NTM" IEC_WindType - IEC turbulence type ("NTM"=normal, "xETM"=extreme turbulence, "xEWM1"=extreme 1-year wind, "xEWM50"=extreme 50-year wind, where x=wind turbine class 1, 2, or 3)
"default" ETMc - IEC Extreme Turbulence Model "c" parameter [m/s]
"IEC" WindProfileType - Velocity profile type ("LOG";"PL"=power law;"JET";"H2L"=Log law for TIDAL model;"API";"USR";"TS";"IEC"=PL on rotor disk, LOG elsewhere; or "default")
"unused" ProfileFile - Name of the file that contains input profiles for WindProfileType="USR" and/or TurbModel="USRVKM" [-]
18 RefHt - Height of the reference velocity (URef) [m]
"default" URef - Mean (total) velocity at the reference height [m/s] (or "default" for JET velocity profile) [must be 1-hr mean for API model; otherwise is the mean over AnalysisTime seconds]
"default" ZJetMax - Jet height [m] (used only for JET velocity profile, valid 70-490 m)
"default" PLExp - Power law exponent [-] (or "default")
"default" Z0 - Surface roughness length [m] (or "default")
```

The summary file has:

```
Turbine/Model Specifications:
19 Vertical grid-point matrix dimension
19 Horizontal grid-point matrix dimension
0.100 Time step [seconds]
600.000 Analysis time [seconds]
600.000 Usable output time [seconds]
18.000 Hub height [m]
12.000 Grid height [m]
12.000 Grid width [m]
0.000 Vertical flow angle [degrees]
0.000 Horizontal flow angle [degrees]
Meteorological Boundary Conditions:
TIMESR User-input time series spectral model
N/A IEC standard
N/A IEC turbulence characteristic
N/A IEC turbulence type
N/A IEC Extreme Turbulence Model (ETM) "c" parameter [m/s]
PL Wind profile type
18.000 Reference height [m]
4.902 Reference wind speed [m/s]
N/A Jet height [m]
0.143 Power law exponent
0.030 Surface roughness length [m]
Non-IEC Meteorological Boundary Conditions:
45.000 Site latitude [degrees]
0.000 Gradient Richardson number
0.307 Friction or shear velocity [m/s]
N/A Mixing layer depth [m]
N/A Mean hub u'w' Reynolds stress
N/A Mean hub u'v' Reynolds stress
N/A Mean hub v'w' Reynolds stress
Spatial Coherence Models:
GENERAL u-component coherence model
GENERAL v-component coherence model
GENERAL w-component coherence model
( 12.000, 0.353E-03) u-component coherence parameters
(*********, 0.00 ) v-component coherence parameters
(*********, 0.00 ) w-component coherence parameters
0.000 Coherence exponent
Profiles from User-Defined Time-Series Input:
Height Wind Speed Horizontal Angle Vertical Angle
(m) (m/s) (deg) (deg)
------ ---------- ---------------- --------------
18.00 4.90 -180.00 -0.00
You have requested that the following file(s) be generated:
Aerogen_turbsim.bts (AeroDyn/TurbSim full-field wind file)
Aerogen_turbsim.u (formatted full-field U-component file)
Aerogen_turbsim.v (formatted full-field V-component file)
Aerogen_turbsim.w (formatted full-field W-component file)
Turbulence Simulation Scaling Parameter Summary:
Turbulence model used = User-input time series
Gradient Richardson number = 0.000
Monin-Obukhov (M-O) z/L parameter = 0.000
Monin-Obukhov (M-O) length scale = Infinite
Mean wind speed at hub height = 4.902 m/s
Wind profile type = Power law
Power law exponent = 0.143
Mean shear across rotor disk = 0.040 (m/s)/m
Assumed rotor diameter = 12.000 m
Surface roughness length = 0.030 m
Nyquist frequency of turbulent wind field = 5.000 Hz
Number of time steps in the FFT = 6000
Number of time steps output = 6000
Number of points simulated = 361
Mean Flow Angles:
Vertical = 0.0 degrees
Horizontal = 0.0 degrees
Mean Wind Speed Profile:
Height Wind Speed Horizontal Angle Vertical Angle U-comp (X) V-comp (Y) W-comp (Z)
(m) (m/s) (degrees) (degrees) (m/s) (m/s) (m/s)
------ ---------- ---------------- -------------- ---------- ---------- ----------
24.0 5.11 0.00 0.00 5.11 0.00 0.00
23.3 5.09 0.00 0.00 5.09 0.00 0.00
22.7 5.07 0.00 0.00 5.07 0.00 0.00
22.0 5.04 0.00 0.00 5.04 0.00 0.00
21.3 5.02 0.00 0.00 5.02 0.00 0.00
20.7 5.00 0.00 0.00 5.00 0.00 0.00
20.0 4.98 0.00 0.00 4.98 0.00 0.00
19.3 4.95 0.00 0.00 4.95 0.00 0.00
18.7 4.93 0.00 0.00 4.93 0.00 0.00
18.0 4.90 0.00 0.00 4.90 0.00 0.00
17.3 4.88 0.00 0.00 4.88 0.00 0.00
16.7 4.85 0.00 0.00 4.85 0.00 0.00
16.0 4.82 0.00 0.00 4.82 0.00 0.00
15.3 4.79 0.00 0.00 4.79 0.00 0.00
14.7 4.76 0.00 0.00 4.76 0.00 0.00
14.0 4.73 0.00 0.00 4.73 0.00 0.00
13.3 4.70 0.00 0.00 4.70 0.00 0.00
12.7 4.66 0.00 0.00 4.66 0.00 0.00
12.0 4.63 0.00 0.00 4.63 0.00 0.00
```

and the corresponding HH u and v components (after simulation):

```
t u v w
0.1 5.808 -0.101 -0.243
0.2 6.299 -0.29 -0.37
0.3 6.756 0.064 -0.389
0.4 6.546 -0.436 -0.808
0.5 6.52 -0.333 -0.807
0.6 6.498 -0.671 -0.913
0.7 6.144 -0.217 -1.005
0.8 6.225 -0.525 -1.116
0.9 6.369 -0.598 -0.908
1 6.421 -0.803 -1.017
```

Would appreciate your suggestion!