4.2.15.12. List of Output Channels
This is a list of all possible output parameters available within FAST.Farm (except those that are available from OpenFAST, which are specified within the OpenFAST input file(s) and output separately for each turbine). The names are grouped by meaning, but can be ordered in the OUTPUTS section of the FAST.Farm primary input file as you see fit.
T\(\alpha\) refers to turbine \(\alpha\), where \(\alpha\) is a onedigit number in the range [1,9], corresponding to row \(\alpha\) in the wind turbine input table. If NumTurbines > 9, only values for the first 9 turbines can be output. Setting \(\alpha\) > NumTurbines yields invalid output.
In\(\zeta\) and Ot\(\zeta\) refer to supercontroller input and output \(\zeta\), respectively, where \(\zeta\) is a onedigit number in the range [1,9], corresponding to element \(\zeta\) in the input and output arguments of the supercontroller source code. If there are more than 9 elements, only values for the first 9 inputs and outputs can be output. Setting \(\zeta\) greater than the number of elements yields invalid output.
N\(\beta\) refers to radial output node \(\beta\), where \(\beta\) is a twodigit number in the range [01,20], corresponding to entry \(\beta\) in the OutRadii list, where node \(\beta\) is at radius dr \(\times\) OutRadii[\(\beta\)]. Setting \(\beta\) > NOutRadii yields invalid output.
W\(\eta\) refers to wind point \(\eta\), where \(\eta\) is a onedigit number in the range [1,9], corresponding to entry \(\eta\)in the WindVelX, WindVelY, and WindVelZ lists. Setting \(\eta\) > NWindVel yields invalid output. Setting WindVelX, WindVelY, and WindVelZ outside the lowresolution wind domain also yields invalid output.
\(\delta\) refers to the X, Y, or Z coordinate axis.
D\(\gamma\) refers to downstream distance \(\gamma\), where \(\gamma\) is a onedigit number in the range [1,9], corresponding to entry \(\gamma\) in the OutDist list. Setting \(\gamma\) > NOutDist yields invalid output. The output is also invalid if OutDist is a distance further downstream than the wake has been calculated or for any distance where the wake from the turbine has overlapped itself.
Channel Name 
Units 
Description 

Super Controller 

SCGblIn\(\zeta\) 
(user) 
Global (turbine independent) super controller input \(\zeta\) 
SCT\(\alpha\)In\(\zeta\) 
(user) 
Turbinedependent super controller input \(\zeta\) for turbine \(\alpha\) 
SCGblOt\(\zeta\) 
(user) 
Global (turbine independent) super controller output \(\zeta\) 
SCT\(\alpha\)Ot\(\zeta\) 
(user) 
Turbinedependent super controller input \(\zeta\) for turbine \(\alpha\) 
Wind Turbine and Inflow 

RtAxs\(\delta\)T\(\alpha\) 
() 
Orientation of the rotor centerline for turbine \(\alpha\) in the global coordinate system 
RtPos\(\delta\)T\(\alpha\) 
(m) 
Position of the rotor (hub) center for turbine \(\alpha\) in the global coordinate system 
RtDiamT\(\alpha\) 
(m) 
Rotor diameter for turbine \(\alpha\) 
YawErrT\(\alpha\) 
(deg) 
Nacelleyaw error for turbine \(\alpha\) 
TIAmbT\(\alpha\) 
(%) 
Ambient turbulence intensity of the wind at the the rotor disk for turbine \(\alpha\). The ambient turbulence intensity is based on a spatialaverage of the three vector components, instead of just the axial component. 
RtVAmbT\(\alpha\) 
(m/s) 
Rotordiskaveraged ambient wind speed (normal to disk, not including structural motion, local induction or wakes from upstream turbines) for turbine \(\alpha\) 
RtVAmbFiltT\(\alpha\) 
(m/s) 

AxiSkewT\(\alpha\) 
(deg) 

AxiSkewFiltT\(\alpha\) 
(deg) 

RtSkewT\(\alpha\) 
(deg) 
Skew angle (used in curledwake model) for turbine \(\alpha\) 
RtSkewFiltT\(\alpha\) 
(deg) 

RtGamCurlT\(\alpha\) 
(m^2/s) 

RtVRelT\(\alpha\) 
(m/s) 
Rotordiskaveraged relative wind speed (normal to disk, including structural motion and wakes from upstream turbines, but not including local induction) for turbine \(\alpha\) 
RtCtAvgT\(\alpha\) 
() 

CtT\(\alpha\)N\(\beta\) 
() 
Azimuthally averaged thrust force coefficient (normal to disk) for radial output node \(\beta\) of turbine \(\alpha\) 
Wake (for an Individual Rotor) 

WkAxs\(\delta\)T\(\alpha\)D\(\gamma\) 
() 
Orientation of the wake centerline for downstream distance \(\gamma\) of turbine \(\alpha\) in the global coordinate system 
WkPos\(\delta\)T\(\alpha\)D\(\gamma\) 
(m) 
Center position of the wake centerline for downstream distance \(\gamma\) of turbine \(\alpha\) in the global coordinate system 
WkVel\(\delta\)T\(\alpha\)D\(\gamma\) 
(m/s) 
Advection, deflection, and meandering velocity (not including the horizontal wakedeflection correction or lowpass timefiltering) of the wake for downstream distance \(\gamma\) of turbine \(\alpha\) in the global coordinate system 
WkDiamT\(\alpha\)D\(\gamma\) 
(m) 
Wake diameter for downstream distance \(\gamma\) of turbine \(\alpha\) 
WkDfVxT\(\alpha\)N\(\beta\)D\(\gamma\) 
(m/s) 
Axial wake velocity deficits for radial output node \(\beta\) and downstream distance \(\gamma\) of turbine \(\alpha\) 
WkDfVrT\(\alpha\)N\(\beta\)D\(\gamma\) 
(m/s) 
Radial wake velocity deficits for radial output node \(\beta\) and downstream distance \(\gamma\) of turbine \(\alpha\) 
EddVisT\(\alpha\)N\(\beta\)D\(\gamma\) 
(m\(^2\)/s) 
Total eddy viscosity for radial output node \(\beta\) and downstream distance \(\gamma\) of turbine \(\alpha\) 
EddAmbT\(\alpha\)N\(\beta\)D\(\gamma\) 
(m\(^2\)/s) 
Individual contribution to the eddy viscosity from ambient turbulence for radial output node \(\beta\) and downstream distance \(\gamma\) of turbine \(\alpha\) 
EddShrT\(\alpha\)N\(\beta\)D\(\gamma\) 
(m\(^2\)/s) 
Individual contributions to the eddy viscosity from the shear layer for radial output node \(\beta\) and downstream distance \(\gamma\) of turbine \(\alpha\) 
Ambient Wind and Array Effects 

W\(\eta\)VAmb\(\delta\) 
(m/s) 
Ambient wind velocity (not including wakes) for point \(\eta\) in the global coordinate system (from the lowresolution domain) 
W\(\eta\)VDis\(\delta\) 
(m/s) 
Disturbed wind velocity (including wakes) for point \(\eta\) in the global coordinate system (from the lowresolution domain) 