 Home
 Products
 Integration
 Tutorial
 Barcode FAQ
 Purchase
 Company
ssrs barcode image Two in Software
Two QR Scanner In None Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications. Drawing Quick Response Code In None Using Barcode encoder for Software Control to generate, create Quick Response Code image in Software applications. Example 2.7
QR Code 2d Barcode Reader In None Using Barcode scanner for Software Control to read, scan read, scan image in Software applications. Generate QR In Visual C# Using Barcode maker for .NET Control to generate, create QR Code image in .NET framework applications. Calculate the average length of the civil year in the Gregorian
Paint Denso QR Bar Code In .NET Framework Using Barcode creation for ASP.NET Control to generate, create QR Code JIS X 0510 image in ASP.NET applications. QR Code ISO/IEC18004 Generation In .NET Framework Using Barcode generation for .NET Control to generate, create Quick Response Code image in .NET applications. calendar.
QR Code Generation In Visual Basic .NET Using Barcode creator for VS .NET Control to generate, create QR Code ISO/IEC18004 image in VS .NET applications. Barcode Encoder In None Using Barcode printer for Software Control to generate, create barcode image in Software applications. Solution
Creating ANSI/AIM Code 128 In None Using Barcode creator for Software Control to generate, create Code 128 Code Set C image in Software applications. Data Matrix Printer In None Using Barcode printer for Software Control to generate, create Data Matrix image in Software applications. The nominal number of days in a 400year period is 400 365 146,000. The nominal number of leap years is 400/4 100, but as shown earlier, this must be reduced by 3, and therefore, the number of days in 400 years of the Gregorian calendar is 146,000 100 3 146,097. This gives a yearly average of 146,097/400 365.2425. UPC  13 Maker In None Using Barcode printer for Software Control to generate, create EAN 13 image in Software applications. UPCA Drawer In None Using Barcode creator for Software Control to generate, create GS1  12 image in Software applications. In calculations requiring satellite predictions, it is necessary to determine whether a year is a leap year or not, and the simple rule is: If the year number ends in two zeros and is divisible by 400 without remainder, it is a leap year. Otherwise, if the year number is divisible by 4 without remainder, it is a leap year. Creating EAN  14 In None Using Barcode creator for Software Control to generate, create ITF14 image in Software applications. UPCA Reader In None Using Barcode decoder for Software Control to read, scan read, scan image in Software applications. Example 2.8 Determine which of the following years are leap years: (a) 1987, (b) 1988, (c) 2000, (d) 2100. Code 128C Encoder In None Using Barcode printer for Office Excel Control to generate, create Code 128 image in Office Excel applications. Matrix Barcode Drawer In VB.NET Using Barcode drawer for .NET framework Control to generate, create 2D Barcode image in .NET applications. Solution
Data Matrix 2d Barcode Reader In None Using Barcode reader for Software Control to read, scan read, scan image in Software applications. Bar Code Creator In .NET Framework Using Barcode generator for .NET Control to generate, create bar code image in .NET framework applications. (a) 1987/4 (b) 1988/4 (c) 2000/400 Barcode Encoder In Java Using Barcode printer for BIRT reports Control to generate, create barcode image in Eclipse BIRT applications. Create EAN13 In Visual Studio .NET Using Barcode maker for VS .NET Control to generate, create EAN13 Supplement 5 image in VS .NET applications. 496.75 (therefore, 1987 is not a leap year) 497 (therefore, 1988 is a leap year) 5 (therefore, 2000 is a leap year) (d) 2100/400 5.25 (therefore, 2100 is not a leap year, even though 2100 is divisible by 4 without remainder) 2.9.2 Universal time
Universal time coordinated (UTC) is the time used for all civil time keeping purposes, and it is the time reference which is broadcast by the National Bureau of Standards as a standard for setting clocks. It is based on an atomic timefrequency standard. The fundamental unit for UTC is the mean solar day (see App. J in Wertz, 1984). In terms of clock time, the mean solar day is divided into 24 h, an hour into 60 min, and a minute into 60 s. Thus there are 86,400 clock seconds in a mean solar day. Satelliteorbit epoch time is given in terms of UTC. Example 2.9 Calculate the time in days, hours, minutes, and seconds for the epoch day 324.95616765.
This represents the 324th day of the year plus 0.95616765 mean solar day. The decimal fraction in hours is 24 0.95616765 22.9480236; the decimal fraction of this expressed in minutes is 0.9480236 60 56.881416; the decimal fraction of this expressed in seconds is 0.881416 60 52.88496. Thus, the epoch is day 324, at 22 h, 58 m, 52.88 s. Solution
Orbits and Launching Methods
Universal time coordinated is equivalent to Greenwich mean time (GMT), as well as Zulu (Z) time. There are a number of other universal time systems, all interrelated ( Wertz, 1984) and all with the mean solar day as the fundamental unit. For present purposes, the distinction between these systems is not critical, and the term universal time (UT), will be used from now on. For computations, UT will be required in two forms: as a fraction of a day and in degrees. Given UT in the normal form of hours, minutes, and seconds, it is converted to fractional days as UTday 1 ahours 24 minutes 60 seconds b 3600 (2.18) In turn, this may be converted to degrees as UT
2.9.3 Julian dates* 360 UTday
(2.19) Calendar times are expressed in UT, and although the time interval between any two events may be measured as the difference in their calendar times, the calendar time notation is not suited to computations where the timing of many events has to be computed. What is required is a reference time to which all events can be related in decimal days. Such a reference time is provided by the Julian zero time reference, which is 12 noon (12:00 UT) on January 1 in the year 4713 B.C.! Of course, this date would not have existed as such at the time; it is a hypothetical starting point, which can be established by counting backward according to a certain formula. For details of this intriguing time reference, see Wertz (1984, p. 20). The important point is that ordinary calendar times are easily converted to Julian dates, measured on a continuous time scale of Julian days. To do this, first determine the day of the year, keeping in mind that day zero, denoted as Jan 0.0 is midnight between December 30 and 31 of the previous year. For example, noon on December 31 would be January 0.5, and noon on January 1 would be January 1.5. It may seem strange that the last day of December should be denoted as day zero in January, but it will be seen that this makes the day count correspond to the actual calendar day. A Fortran program for calculating the Julian day for any date and time is given in Wertz (1984, p. 20), and a general method is given in DuffettSmith (1986, p. 9). Once the Julian day is known for a given reference date and time, the Julian day for any other time can be easily calculated by adding or subtracting the required day difference. Some reference times are listed in Table 2.2. It should be noted that the Julian date is not associated with the Julian calendar introduced by Julius Caesar.

