function meqt()
%MEQT helper function, lists meaning of output variables stored in LY
% Code-specific output quantities are documented in code-specific files, 
% see  FBTT, LIUT, FGET, FGST
%
%  Dimensions: Q: normalized sqrt poloidal flux including axis (L.pQ)
%              q: normalized sqrt poloidal flux excluding axis (L.pq)
%              rx,zx: computational grid L.rx,L.zx
%              ry,zy: inner computational grid excluding boundary: L.ry,L.zy
%              o: poloidal angle theta grid (L.oq)
%              g: basis functions
%              D: plasma domain (>1 for e.g. doublets)
%              W: wall gaps, nFW: number of flux values being tracked
%              t: time
% 
% NB: In the code the q and Q suffixes can be used to designate 2D (rho,theta) quantities.
%     For clarity they are broken down here into q/Q for rho and o for theta.
%
% .shot  Shot number
% .t     Time base                                                   (t)       [s]
%
% Main equilibrium and integral quantities:
% .ag    Basis function coefficients                                 (g,D,t)   [-]
% .Bm    Fitted magnetic probe measurements                          (*,t)     [T]
% .bp    Beta poloidal                                               (t)       [-]
% .bpli2 Betap + li/2                                                (t)       [-]
% .bt    Beta toroidal                                               (t)       [-]
% .Ff    Fitted flux loop poloidal flux                              (*,t)     [Wb]
% .FR    Ratio of normalized X-point/boundary flux                   (D,t)     [-]
% .Ft0   Vacuum contribution to the toroidal flux                    (t)       [Wb]
% .Ft    Plasma contribution to the toroidal flux                    (t)       [Wb]
% .Fx    Plasma poloidal flux map on                                 (rx,zx,t) [Wb]
% .Ia    Fitted poloidal field coil currents                         (*,t)     [A]
% .Ip    Total plasma current                                        (t)       [A]
% .Is    Vessel segment currents                                     (*,t)     [A]
% .Iu    Vessel currents in generalized description                  (*,t)     [A]
% .Iv    Vessel filament currents                                    (*,t)     [A]
% .Iy    Plasma current distribution                                 (ry,zy,t) [A]
% .Opy   Plasma domain index                                         (ry,zy,t) [-]
% .li    Normalised internal inductance                              (t)       [-]
% .mu    Normalised diamagnetism                                     (t)       [-]
% .nA    Number of magnetic axes found                               (t)       [-]
% .PA    Pressure on axis                                            (D,t)     [Pa]
% .qA    q on axis using small diamagnetic approximation             (D,t)     [-]
% .FA    Poloidal flux on magnetic axis                              (D,t)     [Wb]
% .rA    r position of magnetic axis                                 (D,t)     [m]
% .zA    z position of magnetic axis                                 (D,t)     [m]
% .dr2FA 2nd derivative wrt r of poloidal flux on axis               (D,t)     [Wb/m^2]
% .drzFA 2nd derivative wrt r,z of poloidal flux on axis             (D,t)     [Wb/m^2]
% .dz2FA 2nd derivative wrt z of poloidal flux on axis               (D,t)     [Wb/m^2]
% .nB    Number of plasma domain boundaries found                    (t)       [-]
% .lB    Boolean flag indicating if domain boundary has been found   (D,t)     [-]
% .FB    Poloidal flux at pt. defining plasma domain boundary        (D,t)     [Wb]
% .rB    r position of point defining plasma domain boundary         (D,t)     [m]
% .zB    z position of point defining plasma domain boundary         (D,t)     [m]
% .rBt   Vacuum toroidal field * r                                   (t)       [T.m]
% .rIp   R of centroid of current distribution                       (t)       [m]
% .zIp   z position of centroid of current distribution              (t)       [m]
% .lX    Boolean flag indicating if domain is diverted               (D,t)     [-]
% .nX    Number of X points found                                    (t)       [-]
% .FX    Flux at X points                                            (*,t)     [Wb]
% .rX    r position of X points                                      (*,t)     [m]
% .zX    z position of X points                                      (*,t)     [m]
% .PQ    Pressure profile                                            (Q,D,t)   [Pa]
% .TQ    T = r*Btor profile                                          (Q,t)     [T.m]
% .iTQ   1/TQ (if P.smalldia: with small diagmagnetic approximation) (Q,t)     [1/(T.m)]
% .Wk    Plasma kinetic energy                                       (t)       [J]
% .WN    Normalisation energy                                        (t)       [J]
% .Wp    Plasma poloidal magnetic energy                             (t)       [J]
% .Wt0   Vacuum toroidal magnetic energy                             (t)       [J]
% .Wt    Plasma toroidal magnetic energy                             (t)       [J]
% .Vp    Plasma volume                                               (t)       [m^3]
% 
% % Integral quantities per plasma domain
% .bpD   Beta poloidal per domain                                    (D,t)     [-]
% .btD   Beta toroidal per domain                                    (D,t)     [-]
% .FtD   Plasma toroidal flux per domain                             (D,t)     [Wb]
% .Ft0D  Vacuum toroidal flux per domain                             (D,t)     [Wb]
% .IpD   Plasma current per domain                                   (D,t)     [A]
% .liD   Normalised internal inductance per domain                   (D,t)     [-]
% .TpDg  Integral of basis function values per domain                (g,D,t)   [-]
% .ITpDg Integral of primitives of basis function values per domain  (g,D,t)   [-]
% .rIpD  r position of centroid of current distribution              (D,t)     [m]
% .zIpD  z position of centroid of current distribution              (D,t)     [m]
% .VpD   Plasma volume per domain                                    (D,t)     [m^3]
% .WkD   Plasma kinetic energy per domain                            (D,t)     [J]
% .WpD   Plasma poloidal magnetic energy per domain                  (D,t)     [J]
% .WtD   Plasma toroidal magnetic energy per domain                  (D,t)     [J]
% .Wt0D  Vacuum toroidal magnetic energy per domain                  (D,t)     [J]
% .WND   Normalisation energy per domain                             (D,t)     [J]
%
% % Integral quantities on rho grid per plasma domain
% .FtQ   Plasma toroidal flux contained in flux surface              (Q,D,t)   [Wb]
% .Ft0Q  Vacuum toroidal flux contained in flux surface              (Q,D,t)   [Wb]
% .FtPQ  Total toroidal flux contained in flux surface (FtQ+Ft0Q)    (Q,D,t)   [Wb]                                  
% .IpQ   Plasma current contained in flux surface                    (Q,D,t)   [A]
% .OpQ   Number of grid points contained in flux surface             (Q,t)     [-]
% .PpQg  p' base functions multiplied by their coefficients 
%         for first domain                                           (Q,g,t)   [Pa/Wb]
% .PpQ   p' profile                                                  (Q,D,t)   [Pa/Wb]
% .TTpQg TT' base functions multiplied by their coefficients 
%         for first domain                                           (Q,g,t)   [T^2.m^2/Wb]
% .TTpQ  TT' profile                                                 (Q,D,t)   [T^2.m^2/Wb]
% .VpQ   Plasma volume contained in flux surface                     (Q,D,t)   [m^3]
% .WkQ   Plasma kinetic energy contained in flux surface             (Q,D,t)   [J]
% .WpQ   Plasma poloidal magnetic energy contained in flux surface   (Q,D,t)   [J]
%
% % Contour-related quantities on rho grid per plasma domain D, only available for iterq>0
% .aq      distance between point on flux surface and magnetic axis  (q,o,D,t) [m]
% .zq      z position of flux surface points                         (q,o,D,t) [m]
% .rq      r position of flux surface points                         (q,o,D,t) [m]
% .raQ     Outboard r/A value on pQ grid                             (Q,D,t)   [-]
% .iqQ     1/q profile where q is the safety factor                  (Q,D,t)   [-]
% .jtorQ   Toroidal current density defined as R0*<jphi/R>           (Q,D,t)   [A/m2]
% .raqmin  Outboard r/a value of location of minimum safety factor   (t)       [-]
% .qmin    Minimum safety factor                                     (t)       [-]
% .q95     safety factor at 95% normalized poloidal flux surface     (t)       [-]
% .Q0Q     <1/R>                                                     (Q,t)     [1/m]
% .Q1Q     -dpsi/dV                                                  (Q,t)     [T/m]
% .Q2Q     <1/R^2>                                                   (Q,t)     [1/m^2]
% .Q3Q     <(grad psi)^2/R^2>                                        (Q,t)     [T^2]
% .Q4Q     <(grad psi)^2>                                            (Q,t)     [T^2.m^2]
%
% % Shape related quantities, only availble for iterq>0
% .aminor  Minor radius: (Rmax+Rmin)/2                               (Q,D,t)   [m]
% .epsilon Aspect ratio: aminor/rgeom                                (Q,D,t)   [-]
% .delta   Triangularity: (deltal+deltau)/2                          (Q,D,t)   [-]
% .deltal  Lower triangularity: (r(zmin )-rgeom)/aminor              (Q,D,t)   [-]
% .deltau  Upper triangularity: (r(zmmax)-rgeom)/aminor              (Q,D,t)   [-]
% .kappa   Elongation: (Zmax-Zmin)/(Rmax-Rmin)                       (Q,D,t)   [-]
% .lp      Length of the LCFS poloidal contour: \oint dl             (D,t)     [m]
% .rbary   Radial location of LCFS barycenter: (\oint R dl) / dl     (D,t)     [m]
% .rgeom   r position of geom. center of flux surface: (Rmax-Rmin)/2 (Q,D,t)   [m]
% .zgeom   z position of geom. center of flux surface: (Zmax-Zmin)/2 (Q,D,t)   [m]
%
% % Wall gap information available only for iterq>0
% .aW      Gap distance (defined by L.G.rW,.zW and angle .oW)        (W,nFW,t) [m]         
% .FW      Flux values that are being tracked by gap algorithm       (1,nFW,t) [Wb]
%       
% % Magnetic fields (ifield=true) and vacuum fluxes (ivacuum=true)
% % on x and z grids (z if izgrid=true)
% .Brx   Radial magnetic field                                       (rx,zx,t) [T]
% .Bzx   Vertical magnetic field                                     (rx,zx,t) [T]
% .Brz   Radial magnetic field on z grid                             (rz,zz,t) [T]
% .Bzz   Vertical magnetic field on z grid                           (rz,zz,t) [T]
% .Br0x  Radial magnetic field                                       (rx,zx,t) [T]
% .Bz0x  Vertical magnetic field                                     (rx,zx,t) [T]
% .Br0z  Radial magnetic field on zgrid                              (rz,zz,t) [T]
% .Bz0z  Vertical magnetic field on zgrid                            (rz,zz,t) [T]
% .Fx0   Vacuum flux                                                 (rx,zx,t) [Wb]
% .Fz0   Vacuum flux on z grid                                       (rz,zz,t) [Wb]
%
% % Quantities on interpolation points (when using 'infct')
% .Fn    Flux at interpolation points L.P.rn, L.P.zn                 (*,t)     [Wb]
% .Brn   Br at interpolation points                                  (*,t)     [T]
% .Bzn   Bz at interpolation points                                  (*,t)     [T]
% .Brrn  dBr/dr at interpolation points                              (*,t)     [T/m]
% .Brzn  dBr/dz at interpolation points                              (*,t)     [T/m]
% .Bzzn  dBz/dz at interpolation points                              (*,t)     [T/m]
% .Bzrn  dBz/dr at interpolation points                              (*,t)     [T/m]
%
% % Solver output:
% .err   sum of error flags (slx only): 
%           err=(|Ip|<L.P.Ipmin)+2*(nA==0)+4*(lB==0)+8*(PA<0) (t)[-]
% .isconverged Boolean flag indicating if code has converged         (t)       [-]
% .niter Number of iterations done                                   (t)       [-]
% .res   Solver residual                                             (t)       [-]
%
% [+MEQ MatlabEQuilibrium Toolbox+] Swiss Plasma Center EPFL Lausanne 2022. All rights reserved.
