/********************************************************************** FILENAME: uiuc_getwind.cpp ---------------------------------------------------------------------- DESCRIPTION: sets V_airmass_north, _east, _down for use in LaRCsim ---------------------------------------------------------------------- STATUS: alpha version ---------------------------------------------------------------------- REFERENCES: ---------------------------------------------------------------------- HISTORY: 03/26/2003 initial release ---------------------------------------------------------------------- AUTHOR(S): Glen Dimock Michael Selig ---------------------------------------------------------------------- VARIABLES: ---------------------------------------------------------------------- INPUTS: ---------------------------------------------------------------------- OUTPUTS: ---------------------------------------------------------------------- CALLED BY: uiuc_wrapper ---------------------------------------------------------------------- CALLS TO: none ---------------------------------------------------------------------- COPYRIGHT: (C) 2003 by Michael Selig This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA or view http://www.gnu.org/copyleft/gpl.html. **********************************************************************/ /* UIUC wind gradient test code v0.1 Returns wind vector as a function of altitude for a simple parabolic gradient profile Glen Dimock Last update: 020227 */ #include "uiuc_getwind.h" #include "uiuc_aircraft.h" void uiuc_getwind() { /* Wind parameters */ double zref = 300.; //Reference height (ft) double uref = 0; //Horizontal wind velocity at ref. height (ft/sec) // double uref = 11; //Horizontal wind velocity at ref. height (ft/sec) // double uref = 13; //Horizontal wind velocity at ref. height (ft/sec) // double uref = 20; //Horizontal wind velocity at ref. height (ft/sec), 13.63 mph // double uref = 22.5; //Horizontal wind velocity at ref. height (ft/sec), 15 mph // double uref = 60.; //Horizontal wind velocity at ref. height (ft/sec), 40 mph double ordref =-64.; //Horizontal wind ordinal from north (degrees) double zoff = 300.; //Z offset (ft) - wind is zero at and below this point double zcomp = 0.; //Vertical component (down is positive) /* double zref = 300.; //Reference height (ft) */ /* double uref = 0.; //Horizontal wind velocity at ref. height (ft/sec) */ /* double ordref = 0.; //Horizontal wind ordinal from north (degrees) */ /* double zoff = 15.; //Z offset (ft) - wind is zero at and below this point */ /* double zcomp = 0.; //Vertical component (down is positive) */ /* Get wind vector */ double windmag = 0; //Wind magnitude double a = 0; //Parabola: Altitude = a*windmag^2 + zoff a = zref/pow(uref,2.); if (Altitude >= zoff) windmag = sqrt(Altitude/a); else windmag = 0.; V_north_airmass = windmag * cos(ordref*3.14159/180.); //North component V_east_airmass = windmag * sin(ordref*3.14159/180.); //East component V_down_airmass = zcomp; return; }