Sponsored Content
Top Forums Shell Programming and Scripting Convert epoch time to Julian date Post 302876331 by Akshay Hegde on Saturday 23rd of November 2013 02:58:42 AM
Old 11-23-2013
You may try

Code:
#!/bin/bash

# Usage : Julian STANDARD DAY MON YEAR HOUR MIN SEC
function Julian(){

                   std=$1    
                   Day=$2 ; Mon=$3 ; Year=$4
                   Hour=$5; Min=$6 ; Sec=$7

case "$std" in
    CNES )
                 # Cnes Julian days start at January 1st, 1950    
                 start="Jan 1 1950 12:00:00 AM";;
    NASA ) 
                 # Nasa Julian days are number of days since January 1st, 1958 
                 start="Jan 1 1958 12:00:00 AM";;
        *) 
                 echo "Invalid option" && exit;;
esac

               # Julian Day
                 jd=$(( ( $(date -d "$Year$Mon$Day" +%s) - $(date -d "$start" +%s) ) /(24 * 60 * 60 ) ))
                 ttime=$(echo $Hour $Min $Sec | awk '{print $2/24 +$3/(60*24)+ $4/(60*60*24)}')

               # Realtime Julian Day
                 rjul=$(echo $jd $ttime | awk '{printf "%5.3f\n", $1+$2}')

                  }

printf "\nCalendar Date  : 31-12-2013 10:10:10\n\n"

# CNES Standard
Julian CNES 31 12 2013 10 10 10
printf "CNES Standard\n\tJulian Day : $jd\n\tRealtime Julian Day : $rjul\n"

# NASA Standard
Julian NASA 31 12 2013 10 10 10
printf "NASA Standard\n\tJulian Day : $jd\n\tRealtime Julian Day : $rjul\n\n"

Resulting

Code:
$ ./Julian

Calendar Date  : 31-12-2013 10:10:10

CNES Standard
    Julian Day : 23375
    Realtime Julian Day : 23375.424
NASA Standard
    Julian Day : 20453
    Realtime Julian Day : 20453.424

following link may be useful to you
http://www.aviso.oceanobs.com/en/dat...lian-days.html

Last edited by Akshay Hegde; 11-23-2013 at 04:10 AM..
This User Gave Thanks to Akshay Hegde For This Post:
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

convert Julian date to calender date

Hi, I have script in unix which creates a julian date like 126 or 127 I want convert this julian date into calender date ex : input 127 output 07/may/2007 or 07/05/2007 or 07/05/07 rgds srikanth (6 Replies)
Discussion started by: srikanthus2002
6 Replies

2. Shell Programming and Scripting

Convert Epoch time format to normal date time format in the same file

I have a file named "suspected" with series of line like these : {'protocol': 17, 'service': 'BitTorrent KRPC', 'server': '219.78.120.166', 'client_port': 52044, 'client': '10.64.68.44', 'server_port': 8291, 'time': 1226506312L, 'serverhostname': ''} {'protocol': 17, 'service': 'BitTorrent... (3 Replies)
Discussion started by: rk4k
3 Replies

3. Shell Programming and Scripting

Convert Epoch Time to Standard Date and Time & Vice Versa

Hi guys, I know that this topic has been discuss numerous times, and I have search the net and this forum for it. However, non able to address the problem I faced so far. I am on Solaris Platform and unable to install additional packages like the GNU date and gawk to make use of their... (5 Replies)
Discussion started by: DrivesMeCrazy
5 Replies

4. Shell Programming and Scripting

how to convert date time to epoch time in solaris

Hi, Is there any easy way to convert date time(stored in shell variable ) to epoch time in solaris box? As +%s is working on linux but not on solaris, also -d option is not working. Any suggestion please? (6 Replies)
Discussion started by: anshuman0507
6 Replies

5. Shell Programming and Scripting

Convert epoch to human readable date & time format

Hello I have log file from solaris system which has date field converted by Java application using System.currentTimeMillis() function, example is 1280943608380 which equivalent to GMT: Wed, 04 Aug 2010 17:40:08 GMT. Now I need a function in shell script which will convert 1280943608380... (3 Replies)
Discussion started by: Yaminib
3 Replies

6. Shell Programming and Scripting

Shell script to convert epoch time to real time

Dear experts, I have an epoch time input file such as : - 1302451209564 1302483698948 1302485231072 1302490805383 1302519244700 1302492787481 1302505299145 1302506557022 1302532112140 1302501033105 1302511536485 1302512669550 I need the epoch time above to be converted into real... (4 Replies)
Discussion started by: aismann
4 Replies

7. Shell Programming and Scripting

Need a unix script to convert date into Julian format in a text file

The 6th & 7th column of the text files represents date & time. I need this to be converted in julian format using command "date +%s -d <date>". I know the command, but dont know how to use it on the script 0 dbclstr-b IXT_Web Memphis_Prod_SQL_Full Memphis-Prod-SQL-Full-Application-Backup... (4 Replies)
Discussion started by: ajiwww
4 Replies

8. Shell Programming and Scripting

Using awk or nawk to convert epoch time to date format

Looking for some help and usually when I do a search this site comes up. Hopefully someone can give me a little direction as to how to use one of these two commands to achieve what I'm trying to do. What am I trying to do? I need to take the time value in epoch format returned from the... (5 Replies)
Discussion started by: minigts
5 Replies

9. Shell Programming and Scripting

Convert to epoch time

how can i modify the following command to instead provide the epoch time of the interfaces file? perl -le 'print scalar localtime ((stat "/home/skysmart/interfaces"))' Tue Feb 19 03:44:52 2013 i'm hoping to get the equivalent of this command: stat --format=%Y /home/skysmart/interfaces ... (2 Replies)
Discussion started by: SkySmart
2 Replies

10. Shell Programming and Scripting

Convert Second Column Date Into EPOCH Time And Print Complete Row

Hello Team, I am stuck in getting the required output in the following case. Please help. My input file is aa|08/01/2016 bb|08/15/2016 I wish to convert the file into aa|epoch time bb|epoch time I am using following code: (3 Replies)
Discussion started by: angshuman
3 Replies
CAL(1)							    BSD General Commands Manual 						    CAL(1)

NAME
cal, ncal -- displays a calendar and the date of easter SYNOPSIS
cal [-jy] [[month] year] cal [-j] -m month [year] ncal [-jJpwy] [-s country_code] [[month] year] ncal [-Jeo] [year] DESCRIPTION
The cal utility displays a simple calendar in traditional format and ncal offers an alternative layout, more options and the date of easter. The new format is a little cramped but it makes a year fit on a 25x80 terminal. If arguments are not specified, the current month is dis- played. The options are as follows: -J Display Julian Calendar, if combined with the -e option, display date of easter according to the Julian Calendar. -e Display date of easter (for western churches). -j Display Julian days (days one-based, numbered from January 1). -m month Display the specified month. -o Display date of orthodox easter (Greek and Russian Orthodox Churches). -p Print the country codes and switching days from Julian to Gregorian Calendar as they are assumed by ncal. The country code as deter- mined from the local environment is marked with an asterisk. -s country_code Assume the switch from Julian to Gregorian Calendar at the date associated with the country_code. If not specified, ncal tries to guess the switch date from the local environment or falls back to September 2, 1752. This was when Great Britain and her colonies switched to the Gregorian Calendar. -w Print the number of the week below each week column. -y Display a calendar for the specified year. A single parameter specifies the year (1 - 9999) to be displayed; note the year must be fully specified: ``cal 89'' will not display a calen- dar for 1989. Two parameters denote the month and year; the month is either a number between 1 and 12, or a full or abbreviated name as specified by the current locale. Month and year default to those of the current system clock and time zone (so ``cal -m 8'' will display a calendar for the month of August in the current year). A year starts on Jan 1. SEE ALSO
calendar(3), strftime(3) HISTORY
A cal command appeared in Version 5 AT&T UNIX. The ncal command appeared in FreeBSD 2.2.6. AUTHORS
The ncal command and manual were written by Wolfgang Helbig <helbig@FreeBSD.org>. BUGS
The assignment of Julian--Gregorian switching dates to country codes is historically naive for many countries. BSD
November 23, 2004 BSD
All times are GMT -4. The time now is 05:44 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy