; UVFIXPRM ;--------------------------------------------------------------- ;! Parameter adverb array for task UVFIX ;# ADVERB UV ;----------------------------------------------------------------------- ;; Copyright (C) 1995 ;; Associated Universities, Inc. Washington DC, USA. ;; ;; 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; if not, write to the Free ;; Software Foundation, Inc., 675 Massachusetts Ave, Cambridge, ;; MA 02139, USA. ;; ;; Correspondence concerning AIPS should be addressed as follows: ;; Internet email: aipsmail@nrao.edu. ;; Postal address: AIPS Project Office ;; National Radio Astronomy Observatory ;; 520 Edgemont Road ;; Charlottesville, VA 22903-2475 USA ;----------------------------------------------------------------------- ;--------------------------------------------------------------- UVFIXPRM LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC ---------------------------------------------------------------- UVFIXPRM Type: Adverb (Real(20)) Use: The task specific parameters for UVFIX. Specifies geometry and time information. Null value: Usually 0. Tasks: UVFIX Recomputes u, v, and w with optional tangent point shift. 1 => array type, 0=VLA, 1=VLBI, 2=other. 2 => array number, 0 => loop over all. 3+4 => array BX, meters. (proper defaults for UVFIXPRM(1)= 5+6 => array BY, meters. 0 or 1) 7+8 => array BZ, meters. Here X is in the direction of the intersection of the meridian of the reference location (long=0 for earth centered) and the equator; Y is 90 deg. EAST along the equator from X; Z is in the direction of the N. pole. Note that: BX = UVFIXPRM(3) + UVFIXPRM(4), BY = UVFIXPRM(5) + UVFIXPRM(6), BZ = UVFIXPRM(7) + UVFIXPRM(8). The addition of two parameters allows the coordinates to be specified with more precision than a single adverb allows; on a 32-bit machines adverb values are only accurate to 7 significant digits. 11 => UT1-UTC in seconds, no default. 12 => IAT-UTC in seconds, default = year-1961 which is OK until mid-1982 when after which it is off 1 (or more) second(s). Accurate values for both UT1-UTC and IAT-UTC can be obtained from USNO Bulletin no. 7. 13 => Clock error. This is mostly used for VLA data for which the time labels are in error by half of the MODCOMP online averaging time. Usually 5 seconds. (no default). The clock error is subtracted from times in the file. 14 => Frequency in Hz. If .LE.0 the value in the AN file will be used. ----------------------------------------------------------------