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Adding a new geographical coordinate transformations and helpers library for system testing
This commit is contained in:
Javier Arribas
parent
a3dc0f564c
commit
b4db4013eb
@ -18,6 +18,7 @@
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set(SYSTEM_TESTING_LIB_SOURCES
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geofunctions.cc
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spirent_motion_csv_dump_reader.cc
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rtklib_solver_dump_reader.cc
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)
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473
src/tests/system-tests/libs/geofunctions.cc
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473
src/tests/system-tests/libs/geofunctions.cc
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@ -0,0 +1,473 @@
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/*!
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* \file geofunctions.h
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* \brief A set of coordinate transformations functions and helpers,
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* some of them migrated from MATLAB, for geographic information systems.
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* \author Javier Arribas, 2018. jarribas(at)cttc.es
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2018 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* GNSS-SDR is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GNSS-SDR is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNSS-SDR. If not, see <https://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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#include "geofunctions.h"
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#define STRP_G_SI 9.80665
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#define STRP_PI 3.1415926535898 //!< Pi as defined in IS-GPS-200E
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arma::mat Skew_symmetric(arma::vec a)
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{
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arma::mat A = arma::zeros(3, 3);
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A << 0.0 << -a(2) << a(1) << arma::endr
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<< a(2) << 0.0 << -a(0) << arma::endr
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<< -a(1) << a(0) << 0 << arma::endr;
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// {{0, -a(2), a(1)},
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// {a(2), 0, -a(0)},
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// {-a(1), a(0), 0}};
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return A;
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}
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double WGS84_g0(double Lat_rad)
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{
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double k = 0.001931853; //normal gravity constant
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double e2 = 0.00669438002290; //the square of the first numerical eccentricity
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double nge = 9.7803253359; //normal gravity value on the equator (m/sec^2)
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double b = sin(Lat_rad); //Lat in degrees
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b = b * b;
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double g0 = nge * (1 + k * b) / (sqrt(1 - e2 * b));
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return g0;
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}
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double WGS84_geocentric_radius(double Lat_geodetic_rad)
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{
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//WGS84 earth model Geocentric radius (Eq. 2.88)
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double WGS84_A = 6378137.0; //Semi-major axis of the Earth, a [m]
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double WGS84_IF = 298.257223563; //Inverse flattening of the Earth
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double WGS84_F = (1 / WGS84_IF); //The flattening of the Earth
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//double WGS84_B=(WGS84_A*(1-WGS84_F)); // Semi-minor axis of the Earth [m]
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double WGS84_E = (sqrt(2 * WGS84_F - WGS84_F * WGS84_F)); //Eccentricity of the Earth
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//transverse radius of curvature
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double R_E = WGS84_A / sqrt(1 -
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WGS84_E * WGS84_E *
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sin(Lat_geodetic_rad) *
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sin(Lat_geodetic_rad)); // (Eq. 2.66)
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//gocentric radius at the Earth surface
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double r_eS = R_E * sqrt(cos(Lat_geodetic_rad) * cos(Lat_geodetic_rad) +
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(1 - WGS84_E * WGS84_E) * (1 - WGS84_E * WGS84_E) * sin(Lat_geodetic_rad) * sin(Lat_geodetic_rad)); // (Eq. 2.88)
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return r_eS;
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}
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int topocent(double *Az, double *El, double *D, const arma::vec &x, const arma::vec &dx)
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{
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double lambda;
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double phi;
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double h;
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double dtr = STRP_PI / 180.0;
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double a = 6378137.0; // semi-major axis of the reference ellipsoid WGS-84
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double finv = 298.257223563; // inverse of flattening of the reference ellipsoid WGS-84
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// Transform x into geodetic coordinates
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togeod(&phi, &lambda, &h, a, finv, x(0), x(1), x(2));
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double cl = cos(lambda * dtr);
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double sl = sin(lambda * dtr);
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double cb = cos(phi * dtr);
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double sb = sin(phi * dtr);
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arma::mat F = arma::zeros(3, 3);
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F(0, 0) = -sl;
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F(0, 1) = -sb * cl;
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F(0, 2) = cb * cl;
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F(1, 0) = cl;
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F(1, 1) = -sb * sl;
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F(1, 2) = cb * sl;
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F(2, 0) = 0;
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F(2, 1) = cb;
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F(2, 2) = sb;
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arma::vec local_vector;
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local_vector = arma::htrans(F) * dx;
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double E = local_vector(0);
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double N = local_vector(1);
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double U = local_vector(2);
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double hor_dis;
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hor_dis = sqrt(E * E + N * N);
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if (hor_dis < 1.0E-20)
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{
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*Az = 0;
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*El = 90;
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}
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else
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{
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*Az = atan2(E, N) / dtr;
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*El = atan2(U, hor_dis) / dtr;
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}
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if (*Az < 0)
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{
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*Az = *Az + 360.0;
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}
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*D = sqrt(dx(0) * dx(0) + dx(1) * dx(1) + dx(2) * dx(2));
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return 0;
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}
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int togeod(double *dphi, double *dlambda, double *h, double a, double finv, double X, double Y, double Z)
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{
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*h = 0;
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double tolsq = 1.e-10; // tolerance to accept convergence
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int maxit = 10; // max number of iterations
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double rtd = 180.0 / STRP_PI;
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// compute square of eccentricity
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double esq;
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if (finv < 1.0E-20)
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{
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esq = 0.0;
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}
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else
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{
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esq = (2.0 - 1.0 / finv) / finv;
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}
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// first guess
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double P = sqrt(X * X + Y * Y); // P is distance from spin axis
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//direct calculation of longitude
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if (P > 1.0E-20)
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{
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*dlambda = atan2(Y, X) * rtd;
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}
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else
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{
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*dlambda = 0.0;
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}
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// correct longitude bound
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if (*dlambda < 0)
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{
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*dlambda = *dlambda + 360.0;
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}
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double r = sqrt(P * P + Z * Z); // r is distance from origin (0,0,0)
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double sinphi;
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if (r > 1.0E-20)
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{
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sinphi = Z / r;
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}
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else
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{
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sinphi = 0.0;
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}
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*dphi = asin(sinphi);
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// initial value of height = distance from origin minus
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// approximate distance from origin to surface of ellipsoid
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if (r < 1.0E-20)
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{
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*h = 0;
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return 1;
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}
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*h = r - a * (1 - sinphi * sinphi / finv);
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// iterate
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double cosphi;
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double N_phi;
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double dP;
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double dZ;
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double oneesq = 1.0 - esq;
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for (int i = 0; i < maxit; i++)
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{
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sinphi = sin(*dphi);
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cosphi = cos(*dphi);
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// compute radius of curvature in prime vertical direction
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N_phi = a / sqrt(1 - esq * sinphi * sinphi);
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// compute residuals in P and Z
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dP = P - (N_phi + (*h)) * cosphi;
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dZ = Z - (N_phi * oneesq + (*h)) * sinphi;
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// update height and latitude
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*h = *h + (sinphi * dZ + cosphi * dP);
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*dphi = *dphi + (cosphi * dZ - sinphi * dP) / (N_phi + (*h));
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// test for convergence
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if ((dP * dP + dZ * dZ) < tolsq)
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{
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break;
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}
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if (i == (maxit - 1))
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{
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// LOG(WARNING) << "The computation of geodetic coordinates did not converge";
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}
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}
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*dphi = (*dphi) * rtd;
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return 0;
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}
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arma::mat Gravity_ECEF(arma::vec r_eb_e)
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{
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//Parameters
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double R_0 = 6378137; //WGS84 Equatorial radius in meters
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double mu = 3.986004418E14; //WGS84 Earth gravitational constant (m^3 s^-2)
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double J_2 = 1.082627E-3; //WGS84 Earth's second gravitational constant
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double omega_ie = 7.292115E-5; // Earth rotation rate (rad/s)
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// Calculate distance from center of the Earth
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double mag_r = sqrt(arma::as_scalar(r_eb_e.t() * r_eb_e));
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// If the input position is 0,0,0, produce a dummy output
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arma::vec g = arma::zeros(3, 1);
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if (mag_r != 0)
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{
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//Calculate gravitational acceleration using (2.142)
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double z_scale = 5 * pow((r_eb_e(2) / mag_r), 2);
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arma::vec tmp_vec = {(1 - z_scale) * r_eb_e(0),
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(1 - z_scale) * r_eb_e(1),
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(3 - z_scale) * r_eb_e(2)};
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arma::vec gamma_ = (-mu / pow(mag_r, 3)) * (r_eb_e + 1.5 * J_2 * pow(R_0 / mag_r, 2) * tmp_vec);
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//Add centripetal acceleration using (2.133)
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g(0) = gamma_(0) + pow(omega_ie, 2) * r_eb_e(0);
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g(1) = gamma_(1) + pow(omega_ie, 2) * r_eb_e(1);
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g(2) = gamma_(2);
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}
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return g;
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}
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arma::vec LLH_to_deg(arma::vec LLH)
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{
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double rtd = 180.0 / STRP_PI;
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LLH(0) = LLH(0) * rtd;
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LLH(1) = LLH(1) * rtd;
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return LLH;
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}
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double degtorad(double angleInDegrees)
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{
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double angleInRadians = (STRP_PI / 180.0) * angleInDegrees;
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return angleInRadians;
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}
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double radtodeg(double angleInRadians)
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{
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double angleInDegrees = (180.0 / STRP_PI) * angleInRadians;
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return angleInDegrees;
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}
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double mstoknotsh(double MetersPerSeconds)
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{
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double knots = mstokph(MetersPerSeconds) * 0.539957;
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return knots;
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}
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double mstokph(double MetersPerSeconds)
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{
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double kph = 3600.0 * MetersPerSeconds / 1e3;
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return kph;
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}
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arma::vec CTM_to_Euler(arma::mat C)
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{
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//Calculate Euler angles using (2.23)
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arma::vec eul = arma::zeros(3, 1);
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eul(0) = atan2(C(1, 2), C(2, 2)); // roll
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if (C(0, 2) < -1.0) C(0, 2) = -1.0;
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if (C(0, 2) > 1.0) C(0, 2) = 1.0;
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eul(1) = -asin(C(0, 2)); // pitch
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eul(2) = atan2(C(0, 1), C(0, 0)); // yaw
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return eul;
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}
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arma::mat Euler_to_CTM(arma::vec eul)
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{
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//Eq.2.15
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//Euler angles to Attitude matrix is equivalent to rotate the body
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//in the three axes:
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// arma::mat Ax= {{1,0,0}, {0,cos(Att_phi),sin(Att_phi)} ,{0,-sin(Att_phi),cos(Att_phi)}};
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// arma::mat Ay= {{cos(Att_theta), 0, -sin(Att_theta)}, {0,1,0} , {sin(Att_theta), 0, cos(Att_theta)}};
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// arma::mat Az= {{cos(Att_psi), sin(Att_psi), 0}, {-sin(Att_psi), cos(Att_psi), 0},{0,0,1}};
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// arma::mat C_b_n=Ax*Ay*Az; // Attitude expressed in the LOCAL FRAME (NED)
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// C_b_n=C_b_n.t();
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//Precalculate sines and cosines of the Euler angles
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double sin_phi = sin(eul(0));
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double cos_phi = cos(eul(0));
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double sin_theta = sin(eul(1));
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double cos_theta = cos(eul(1));
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double sin_psi = sin(eul(2));
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double cos_psi = cos(eul(2));
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arma::mat C = arma::zeros(3, 3);
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//Calculate coordinate transformation matrix using (2.22)
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C(0, 0) = cos_theta * cos_psi;
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C(0, 1) = cos_theta * sin_psi;
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C(0, 2) = -sin_theta;
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C(1, 0) = -cos_phi * sin_psi + sin_phi * sin_theta * cos_psi;
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C(1, 1) = cos_phi * cos_psi + sin_phi * sin_theta * sin_psi;
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C(1, 2) = sin_phi * cos_theta;
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C(2, 0) = sin_phi * sin_psi + cos_phi * sin_theta * cos_psi;
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C(2, 1) = -sin_phi * cos_psi + cos_phi * sin_theta * sin_psi;
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C(2, 2) = cos_phi * cos_theta;
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return C;
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}
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arma::vec cart2geo(arma::vec XYZ, int elipsoid_selection)
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{
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const double a[5] = {6378388.0, 6378160.0, 6378135.0, 6378137.0, 6378137.0};
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const double f[5] = {1.0 / 297.0, 1.0 / 298.247, 1.0 / 298.26, 1.0 / 298.257222101, 1.0 / 298.257223563};
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double lambda = atan2(XYZ[1], XYZ[0]);
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double ex2 = (2.0 - f[elipsoid_selection]) * f[elipsoid_selection] / ((1.0 - f[elipsoid_selection]) * (1.0 - f[elipsoid_selection]));
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double c = a[elipsoid_selection] * sqrt(1.0 + ex2);
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double phi = atan(XYZ[2] / ((sqrt(XYZ[0] * XYZ[0] + XYZ[1] * XYZ[1]) * (1.0 - (2.0 - f[elipsoid_selection])) * f[elipsoid_selection])));
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double h = 0.1;
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double oldh = 0.0;
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double N;
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int iterations = 0;
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do
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{
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oldh = h;
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N = c / sqrt(1 + ex2 * (cos(phi) * cos(phi)));
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phi = atan(XYZ[2] / ((sqrt(XYZ[0] * XYZ[0] + XYZ[1] * XYZ[1]) * (1.0 - (2.0 - f[elipsoid_selection]) * f[elipsoid_selection] * N / (N + h)))));
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h = sqrt(XYZ[0] * XYZ[0] + XYZ[1] * XYZ[1]) / cos(phi) - N;
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iterations = iterations + 1;
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if (iterations > 100)
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{
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//std::cout << "Failed to approximate h with desired precision. h-oldh= " << h - oldh;
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break;
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}
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}
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while (std::abs(h - oldh) > 1.0e-12);
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arma::vec LLH = {{phi, lambda, h}}; //radians
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return LLH;
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}
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void ECEF_to_Geo(arma::vec r_eb_e, arma::vec v_eb_e, arma::mat C_b_e, arma::vec &LLH, arma::vec &v_eb_n, arma::mat &C_b_n)
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{
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//Compute the Latitude of the ECEF position
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LLH = cart2geo(r_eb_e, 4); //ECEF -> WGS84 geographical
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// Calculate ECEF to Geographical coordinate transformation matrix using (2.150)
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double cos_lat = cos(LLH(0));
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double sin_lat = sin(LLH(0));
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double cos_long = cos(LLH(1));
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double sin_long = sin(LLH(1));
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//C++11 and arma >= 5.2
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// arma::mat C_e_n = {{-sin_lat * cos_long, -sin_lat * sin_long, cos_lat},
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// {-sin_long, cos_long, 0},
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// {-cos_lat * cos_long, -cos_lat * sin_long, -sin_lat}}; //ECEF to Geo
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//C++98 arma <5.2
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arma::mat C_e_n = arma::zeros(3, 3);
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C_e_n << -sin_lat * cos_long << -sin_lat * sin_long << cos_lat << arma::endr
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<< -sin_long << cos_long << 0 << arma::endr
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<< -cos_lat * cos_long << -cos_lat * sin_long << -sin_lat << arma::endr; //ECEF to Geo
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// Transform velocity using (2.73)
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v_eb_n = C_e_n * v_eb_e;
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C_b_n = C_e_n * C_b_e; // Attitude conversion from ECEF to NED
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}
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|
||||
void Geo_to_ECEF(arma::vec LLH, arma::vec v_eb_n, arma::mat C_b_n, arma::vec &r_eb_e, arma::vec &v_eb_e, arma::mat &C_b_e)
|
||||
{
|
||||
// Parameters
|
||||
double R_0 = 6378137; //WGS84 Equatorial radius in meters
|
||||
double e = 0.0818191908425; //WGS84 eccentricity
|
||||
|
||||
// Calculate transverse radius of curvature using (2.105)
|
||||
double R_E = R_0 / sqrt(1 - (e * sin(LLH(0))) * (e * sin(LLH(0))));
|
||||
|
||||
// Convert position using (2.112)
|
||||
double cos_lat = cos(LLH(0));
|
||||
double sin_lat = sin(LLH(0));
|
||||
double cos_long = cos(LLH(1));
|
||||
double sin_long = sin(LLH(1));
|
||||
r_eb_e = {(R_E + LLH(2)) * cos_lat * cos_long,
|
||||
(R_E + LLH(2)) * cos_lat * sin_long,
|
||||
((1 - e * e) * R_E + LLH(2)) * sin_lat};
|
||||
|
||||
//Calculate ECEF to Geo coordinate transformation matrix using (2.150)
|
||||
//C++11 and arma>=5.2
|
||||
// arma::mat C_e_n = {{-sin_lat * cos_long, -sin_lat * sin_long, cos_lat},
|
||||
// {-sin_long, cos_long, 0},
|
||||
// {-cos_lat * cos_long, -cos_lat * sin_long, -sin_lat}};
|
||||
//C++98 arma <5.2
|
||||
//Calculate ECEF to Geo coordinate transformation matrix using (2.150)
|
||||
arma::mat C_e_n = arma::zeros(3, 3);
|
||||
C_e_n << -sin_lat * cos_long << -sin_lat * sin_long << cos_lat << arma::endr
|
||||
<< -sin_long << cos_long << 0 << arma::endr
|
||||
<< -cos_lat * cos_long << -cos_lat * sin_long << -sin_lat << arma::endr;
|
||||
|
||||
// Transform velocity using (2.73)
|
||||
v_eb_e = C_e_n.t() * v_eb_n;
|
||||
|
||||
// Transform attitude using (2.15)
|
||||
C_b_e = C_e_n.t() * C_b_n;
|
||||
}
|
||||
|
||||
|
||||
void pv_Geo_to_ECEF(double L_b, double lambda_b, double h_b, arma::vec v_eb_n, arma::vec &r_eb_e, arma::vec &v_eb_e)
|
||||
{
|
||||
//% Parameters
|
||||
double R_0 = 6378137; //WGS84 Equatorial radius in meters
|
||||
double e = 0.0818191908425; //WGS84 eccentricity
|
||||
|
||||
// Calculate transverse radius of curvature using (2.105)
|
||||
double R_E = R_0 / sqrt(1 - pow(e * sin(L_b), 2));
|
||||
|
||||
// Convert position using (2.112)
|
||||
double cos_lat = cos(L_b);
|
||||
double sin_lat = sin(L_b);
|
||||
double cos_long = cos(lambda_b);
|
||||
double sin_long = sin(lambda_b);
|
||||
r_eb_e = {(R_E + h_b) * cos_lat * cos_long,
|
||||
(R_E + h_b) * cos_lat * sin_long,
|
||||
((1 - pow(e, 2)) * R_E + h_b) * sin_lat};
|
||||
|
||||
// Calculate ECEF to Geo coordinate transformation matrix using (2.150)
|
||||
arma::mat C_e_n = arma::zeros(3, 3);
|
||||
C_e_n << -sin_lat * cos_long << -sin_lat * sin_long << cos_lat << arma::endr
|
||||
<< -sin_long << cos_long << 0 << arma::endr
|
||||
<< -cos_lat * cos_long << -cos_lat * sin_long << -sin_lat << arma::endr;
|
||||
|
||||
// Transform velocity using (2.73)
|
||||
v_eb_e = C_e_n.t() * v_eb_n;
|
||||
}
|
||||
156
src/tests/system-tests/libs/geofunctions.h
Normal file
156
src/tests/system-tests/libs/geofunctions.h
Normal file
@ -0,0 +1,156 @@
|
||||
/*!
|
||||
* \file geofunctions.h
|
||||
* \brief A set of coordinate transformations functions and helpers,
|
||||
* some of them migrated from MATLAB, for geographic information systems.
|
||||
* \author Javier Arribas, 2018. jarribas(at)cttc.es
|
||||
*
|
||||
* -------------------------------------------------------------------------
|
||||
*
|
||||
* Copyright (C) 2010-2018 (see AUTHORS file for a list of contributors)
|
||||
*
|
||||
* GNSS-SDR is a software defined Global Navigation
|
||||
* Satellite Systems receiver
|
||||
*
|
||||
* This file is part of GNSS-SDR.
|
||||
*
|
||||
* GNSS-SDR 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, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* GNSS-SDR 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 GNSS-SDR. If not, see <https://www.gnu.org/licenses/>.
|
||||
*
|
||||
* -------------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
#ifndef GEOFUNCTIONS_H
|
||||
#define GEOFUNCTIONS_H
|
||||
|
||||
#include <armadillo>
|
||||
// %Skew_symmetric - Calculates skew-symmetric matrix
|
||||
arma::mat Skew_symmetric(arma::vec a);
|
||||
|
||||
double WGS84_g0(double Lat_rad);
|
||||
|
||||
double WGS84_geocentric_radius(double Lat_geodetic_rad);
|
||||
|
||||
/* Transformation of vector dx into topocentric coordinate
|
||||
system with origin at x
|
||||
Inputs:
|
||||
x - vector origin coordinates (in ECEF system [X; Y; Z;])
|
||||
dx - vector ([dX; dY; dZ;]).
|
||||
|
||||
Outputs:
|
||||
D - vector length. Units like the input
|
||||
Az - azimuth from north positive clockwise, degrees
|
||||
El - elevation angle, degrees
|
||||
|
||||
Based on a Matlab function by Kai Borre
|
||||
*/
|
||||
int topocent(double *Az, double *El, double *D, const arma::vec &x, const arma::vec &dx);
|
||||
|
||||
/* Subroutine to calculate geodetic coordinates latitude, longitude,
|
||||
height given Cartesian coordinates X,Y,Z, and reference ellipsoid
|
||||
values semi-major axis (a) and the inverse of flattening (finv).
|
||||
|
||||
The output units of angular quantities will be in decimal degrees
|
||||
(15.5 degrees not 15 deg 30 min). The output units of h will be the
|
||||
same as the units of X,Y,Z,a.
|
||||
|
||||
Inputs:
|
||||
a - semi-major axis of the reference ellipsoid
|
||||
finv - inverse of flattening of the reference ellipsoid
|
||||
X,Y,Z - Cartesian coordinates
|
||||
|
||||
Outputs:
|
||||
dphi - latitude
|
||||
dlambda - longitude
|
||||
h - height above reference ellipsoid
|
||||
|
||||
Based in a Matlab function by Kai Borre
|
||||
*/
|
||||
int togeod(double *dphi, double *dlambda, double *h, double a, double finv, double X, double Y, double Z);
|
||||
|
||||
|
||||
//Gravitation_ECI - Calculates acceleration due to gravity resolved about
|
||||
//ECEF-frame
|
||||
arma::mat Gravity_ECEF(arma::vec r_eb_e);
|
||||
|
||||
/* Conversion of Cartesian coordinates (X,Y,Z) to geographical
|
||||
coordinates (latitude, longitude, h) on a selected reference ellipsoid.
|
||||
|
||||
Choices of Reference Ellipsoid for Geographical Coordinates
|
||||
0. International Ellipsoid 1924
|
||||
1. International Ellipsoid 1967
|
||||
2. World Geodetic System 1972
|
||||
3. Geodetic Reference System 1980
|
||||
4. World Geodetic System 1984
|
||||
*/
|
||||
arma::vec cart2geo(arma::vec XYZ, int elipsoid_selection);
|
||||
|
||||
arma::vec LLH_to_deg(arma::vec LLH);
|
||||
|
||||
double degtorad(double angleInDegrees);
|
||||
|
||||
double radtodeg(double angleInRadians);
|
||||
|
||||
double mstoknotsh(double MetersPerSeconds);
|
||||
|
||||
double mstokph(double Kph);
|
||||
|
||||
|
||||
arma::vec CTM_to_Euler(arma::mat C);
|
||||
|
||||
arma::mat Euler_to_CTM(arma::vec eul);
|
||||
|
||||
void ECEF_to_Geo(arma::vec r_eb_e, arma::vec v_eb_e, arma::mat C_b_e, arma::vec &LLH, arma::vec &v_eb_n, arma::mat &C_b_n);
|
||||
|
||||
|
||||
// %
|
||||
// % Inputs:
|
||||
// % L_b latitude (rad)
|
||||
// % lambda_b longitude (rad)
|
||||
// % h_b height (m)
|
||||
// % v_eb_n velocity of body frame w.r.t. ECEF frame, resolved along
|
||||
// % north, east, and down (m/s)
|
||||
// % C_b_n body-to-NED coordinate transformation matrix
|
||||
// %
|
||||
// % Outputs:
|
||||
// % r_eb_e Cartesian position of body frame w.r.t. ECEF frame, resolved
|
||||
// % along ECEF-frame axes (m)
|
||||
// % v_eb_e velocity of body frame w.r.t. ECEF frame, resolved along
|
||||
// % ECEF-frame axes (m/s)
|
||||
// % C_b_e body-to-ECEF-frame coordinate transformation matrix
|
||||
//
|
||||
// % Copyright 2012, Paul Groves
|
||||
// % License: BSD; see license.txt for details
|
||||
|
||||
void Geo_to_ECEF(arma::vec LLH, arma::vec v_eb_n, arma::mat C_b_n, arma::vec &r_eb_e, arma::vec &v_eb_e, arma::mat &C_b_e);
|
||||
|
||||
|
||||
//pv_Geo_to_ECEF - Converts curvilinear to Cartesian position and velocity
|
||||
//resolving axes from NED to ECEF
|
||||
//This function created 11/4/2012 by Paul Groves
|
||||
//%
|
||||
//% Inputs:
|
||||
//% L_b latitude (rad)
|
||||
//% lambda_b longitude (rad)
|
||||
//% h_b height (m)
|
||||
//% v_eb_n velocity of body frame w.r.t. ECEF frame, resolved along
|
||||
//% north, east, and down (m/s)
|
||||
//%
|
||||
//% Outputs:
|
||||
//% r_eb_e Cartesian position of body frame w.r.t. ECEF frame, resolved
|
||||
//% along ECEF-frame axes (m)
|
||||
//% v_eb_e velocity of body frame w.r.t. ECEF frame, resolved along
|
||||
//% ECEF-frame axes (m/s)
|
||||
|
||||
void pv_Geo_to_ECEF(double L_b, double lambda_b, double h_b, arma::vec v_eb_n, arma::vec &r_eb_e, arma::vec &v_eb_e);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user