Julian Date

Convert a specified Julian Date Vector to Greenwich Mean Sidereal Time (GMST). The expected input matrix may contain multiple dimensions. The output matrix will be in the same size as the input matrix. Warning: Use caution when using GMST as a substitute for Greenwich Apparent Sidereal Time...

Convert a specified Julian Date Vector to Greenwich Apparent Sidereal Time (GAST). The expected input matrix may contain multiple dimensions. The output matrix will be in the same size as the input matrix. Warning: Use caution when using GAST as a substitute for Greenwich Mean Sidereal Time...

A very simple module to help in writing down a date in Maya notation without having to know how to convert a Julian date to a Maya date.For detailed information: * Maya numerals (Wikipedia) * Maya calendar (Wikipedia) * World Calendars (In French, I'm afraid...)The module is capable of rendering...


Platforms: PHP

A simple command to convert calendar dates to julian dates. Quite useful intiming situations where you need elapsed time between dates.Also useful for astronomy applications.


Platforms: Windows, Mac, Linux

Easy Date Converter is a program to perform arithmetical operations with Gregorian, Julian and Annus Novus dates and Julian day numbers. (It is a trilingual English/German/Spanish program.) Suppose a meeting is scheduled for exactly ten weeks (70 days) from Christmas Day 2003. What date will...


Platforms: Windows

Convert ECI (CIS, Epoch J2000.0) Coordinates to WGS 84 (CTS, ECEF) Coordinates. This function has been vectorized for speed.Example Function Call:>> [r_ECEF v_ECEF] = ECItoECEF(JD,r_ECI,v_ECI);Where:JD is the Julian Date vector [1 x N] (units are in days)r_ECI is the position vector [3 x N] (any...


Platforms: Matlab

Convert WGS 84 (CTS, ECEF) Coordinates to ECI (CIS, Epoch J2000.0) Coordinates. This function has been vectorized for speed. The associated error in converting between coordinate frames is on the order of 1.2*10^-11 km when compared to STK ephemeris output.To run this function type the following...


Platforms: Matlab

WJO Time is a simple application to tell the time using different time standards. Features - Local Time; Co-ordinated Universal Time; Julian Date - to nearest second; Apparent Sidereal Time; Mean Sidereal Time. The display can be configured to show any combination of times and when minimised will...


Platforms: Windows

Time::Piece is a Perl module that contains Object Oriented time objects. SYNOPSIS use Time::Piece; my $t = localtime; print "Time is $tn"; print "Year is ", $t->year, "n"; This module replaces the standard localtime and gmtime functions with implementations that return objects. It does...


Platforms: *nix

AstroTimes widget displays the current Universal Time, the Local Sidereal Time, the current Julian Date and the current Modified Julian Date. Since the Local Sidereal Time depends on the longitude, a list of some important astronomical observatories is provided on the back.


Platforms: Mac

MyMenuDate offers a fully customizable system menubar clock and calendar.Features: Fonts, size, and text color selection Background color selection Date information with user-defined display formats Time information with user-defined display formats Day of week, month name, julian date, and week...


Platforms: Mac

PTBSync is a tool to synchronize your PC time with an an atomic clock via the internet. It offers 65 Time servers (NTP) worldwide to choose from. In addition to time synchronization, PTBSync also includes a complete personal organizer for reminders and repetitive events such as birthdays,...


Platforms: Windows

This toolbox contains a satellite tracker MSatTrack. You can input orbital parameters defined by yourself or existing ones (included). The tracking is done in 3D and the resulting grountracks are then plotted on a 2D map after the simulation is done. Several satellites can be simulated...


Platforms: Matlab

A collection of geodetic functions that solve a variety of problems in geodesy. Supports a wide range of common and user-defined reference ellipsoids. Most functions are vectorized. Functions include:Angle Conversions deg2rad - Degrees to radians dms2deg - Degrees,minutes,seconds to degrees...


Platforms: Matlab

Compute the equation of time with accuracy on the order of seconds. This routine can handle multiple millenniums.Function Call With Time String:>> EQtime = EquationOfTime('2000/01/01 00:00:00');Function Call With Julian Date:>> EQtime = EquationOfTime(2451544.5);Input List:UTCjd (Coordinated...


Platforms: Matlab

Julian-Gregorian Date Calculator makes more than simple date conversion among Gregorian and Julian Calendars. This tool is also used for adding and subtracting a number of days, weeks, months and years to or from a given date.


Platforms: Windows, XP, Windows Vista, 7, 7x64

Easy Date Converter is a program to perform arithmetical operations with dates in various solar calendars, including the Gregorian and the ISO 8601 Week Calendar. It is a bilingual English/German program. Suppose you run an advertisement which expires 45 days from today. What date will that be?...


Platforms: Windows

TrayDay - date, calendar, week number and counter utility for the Windows tray, or Windows XP Notification area. TrayDay places an icon showing the date (day of the month) in the system tray. The icon resembles a page of a "tear-off" calendar. You can therefore see the date at a glance - often...


Platforms: Windows, Other

This utility can convert a gregorian date into julian day format/Modified Julian Day format and vice versa. The Julian Day Format counts the day since the 24th november -4713bc. The julian day format is often used in the astronomical section to calculate for example rises.


Platforms: Windows

ESBDateCalc Pro is our Date Calculator for Windows and it aims to provide a sophisticated yet easy to use tool to perform Date Calculations. This includes displaying various information for a given year and a given date, as well as doing calculations on a Date Range as well as a Date / Time...


Platforms: Windows