SUBROUTINE slDRAF (NDP, ANGLE, SIGN, IDMSF) *+ * - - - - - - * D R A F * - - - - - - * * Convert an angle in radians to degrees, arcminutes, arcseconds * (double precision) * * Given: * NDP i number of decimal places of arcseconds * ANGLE d angle in radians * * Returned: * SIGN c '+' or '-' * IDMSF i(4) degrees, arcminutes, arcseconds, fraction * * Notes: * * 1) NDP less than zero is interpreted as zero. * * 2) The largest useful value for NDP is determined by the size * of ANGLE, the format of DOUBLE PRECISION floating-point * numbers on the target machine, and the risk of overflowing * IDMSF(4). On some architectures, for ANGLE up to 2pi, the * available floating-point precision corresponds roughly to * NDP=12. However, the practical limit is NDP=9, set by the * capacity of a typical 32-bit IDMSF(4). * * 3) The absolute value of ANGLE may exceed 2pi. In cases where it * does not, it is up to the caller to test for and handle the * case where ANGLE is very nearly 2pi and rounds up to 360 deg, * by testing for IDMSF(1)=360 and setting IDMSF(1-4) to zero. * * Called: slDDTF * * Last revision: 26 December 2004 * * Copyright P.T.Wallace. All rights reserved. * * License: * 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; either version 2 of the License, or * (at your option) any later version. * * 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 (see SLA_CONDITIONS); if not, write to the * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301 USA * * Copyright (C) 1995 Association of Universities for Research in Astronomy Inc. *- IMPLICIT NONE INTEGER NDP DOUBLE PRECISION ANGLE CHARACTER SIGN*(*) INTEGER IDMSF(4) * Hours to degrees * radians to turns DOUBLE PRECISION F PARAMETER (F=15D0/6.283185307179586476925287D0) * Scale then use days to h,m,s routine CALL slDDTF(NDP,ANGLE*F,SIGN,IDMSF) END