jn2time.pro
4.75 KB
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;+
; NAME:
; JN2TIME
;
; PURPOSE:
;
; The purpose of this function is to convert a Julian number into
; a time string of the form "16 Mar 2009 15:34:26."
;
; AUTHOR:
;
; FANNING SOFTWARE CONSULTING
; David Fanning, Ph.D.
; 1645 Sheely Drive
; Fort Collins, CO 80526 USA
; Phone: 970-221-0438
; E-mail: david@idlcoyote.com
; Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
;
; CATEGORY:
;
; Utility.
;
; CALLING SEQUENCE:
;
; result = JN2TIME(jnumber)
;
; INPUTS:
;
; jnumber: A Julian number or array of Julian numbers. If absent,
; today's current local time is returned.
;
; OUTPUTS:
;
; result: A scalar or vector of time strings of the form "16 Mar 2009 15:34:26".
;
; KEYWORDS:
;
; SHORT: Set this keyword to return just the day, month, year portion of the string.
;
; DEPENDENCIES:
;
; Requires THEMONTHS from the Coyote Library.
;
; http://www.idlcoyote.com/programs/themonths.pro
;
; MODIFICATION HISTORY:
;
; Written by: David W. Fanning, 25 June 2009.
; Retired 9 Jan 2013 and replaced with cgJulian2Date.
;-
;******************************************************************************************;
; Copyright (c) 2009, by Fanning Software Consulting, Inc. ;
; All rights reserved. ;
; ;
; Redistribution and use in source and binary forms, with or without ;
; modification, are permitted provided that the following conditions are met: ;
; ;
; * Redistributions of source code must retain the above copyright ;
; notice, this list of conditions and the following disclaimer. ;
; * Redistributions in binary form must reproduce the above copyright ;
; notice, this list of conditions and the following disclaimer in the ;
; documentation and/or other materials provided with the distribution. ;
; * Neither the name of Fanning Software Consulting, Inc. nor the names of its ;
; contributors may be used to endorse or promote products derived from this ;
; software without specific prior written permission. ;
; ;
; THIS SOFTWARE IS PROVIDED BY FANNING SOFTWARE CONSULTING, INC. ''AS IS'' AND ANY ;
; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES ;
; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT ;
; SHALL FANNING SOFTWARE CONSULTING, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, ;
; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED ;
; TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; ;
; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ;
; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ;
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ;
; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ;
;******************************************************************************************;
FUNCTION JN2Time, jnumber, SHORT=short
; Return to caller, on error
On_Error, 2
; Get today's date, if argument is not present.
IF N_Elements(jnumber) EQ 0 THEN jnumber = Systime(/JULIAN)
; Set up an array for storing the time string.
num = N_Elements(jnumber)
timeString = StrArr(num)
; Process the Julian day values.
CalDat, jnumber, month, day, year, hour, minute, second
IF Keyword_Set(short) THEN BEGIN
timeString = String(day, FORMAT='(I2.2)') + ' ' + $
theMonths(month, /ABBREVIATION, /FIRSTLETTER) + ' ' + $
String(year, FORMAT='(I4)')
ENDIF ELSE BEGIN
timeString = String(day, FORMAT='(I2.2)') + ' ' + $
theMonths(month, /ABBREVIATION, /FIRSTLETTER) + ' ' + $
String(year, FORMAT='(I4)') + ' ' + $
String(hour, FORMAT='(I2.2)') + ':' + $
String(minute, FORMAT='(I2.2)') + ':' + $
String(second, FORMAT='(I2.2)')
ENDELSE
; Make sure you return a scalar, if needed.
IF num EQ 1 THEN Return, timeString[0] ELSE RETURN, timeString
END