Julian Date Calculator
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The Julian Date Calculator gives the user a simple and quick way to convert between Coordinated Universal Time (UTC) in the Gregorian Calendar to the Julian Date as well as the following selection of additional epochs and time systems:
- Modified Julian Date
- Reduced Julian Date
- Truncated Julian Date (NIST and NASA)
- Dublin Julian Day
- Lilian Day Number
- ANSI Date
- Rata Die
- Unix Time
- RAMSES Time
- GPS Time
The Julian date (JD) is the number of days and fractions of a day since noon January 1, 4713 BC at Greenwich. The Modified Julian Date (MJD) has an offset of 2,400,000.5 days from the Julian Date and hence starts at midnight November 17, 1858. The Julian Date is often used for scientific time measurement by the astronomy community and was introduced to provide a single system of dates that could be used when working with different calendars.
What's New in Version 1.5
Added GPS Time. The GPS Time represents the number of seconds since the GPS epoch 00:00 UTC (midnight) on January 6, 1980. GPS time is not adjusted and therefore is offset from UTC by an integer number of seconds, due to the insertion of leap seconds. The number remains constant until the next leap second occurs.
Works very well on iPhone5
It would be perfect for me if it would have three more functions:
- Display a third UTC seconds "wheel"
- Allow entry and display of GPS time in hexadecimal notation
- display current leap-seconds. That display could display number in effect when displaying historical time, or disappear when not displaying current time.
With those changes it would be worth more than $0.99 to me.
- Category: Utilities
- Updated: Apr 18, 2013
- Version: 1.5
- Size: 0.4 MB
- Language: English
- Seller: Milan Battelino
- © 2013 CosmoWerx
Compatibility: Requires iOS 4.3 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5.