![]() ![]() It is also useful for some satellites with passive instruments that need to limit the Sun's influence on the measurements, as it is possible to always point the instruments towards the night side of the Earth. Riding the terminator is useful for active radar satellites, as the satellites' solar panels can always see the Sun, without being shadowed by the Earth. Special cases of the Sun-synchronous orbit are the noon/midnight orbit, where the local mean solar time of passage for equatorial latitudes is around noon or midnight, and the dawn/dusk orbit, where the local mean solar time of passage for equatorial latitudes is around sunrise or sunset, so that the satellite rides the terminator between day and night. The LST zones show how the local time beneath the satellite varies at different latitudes and different points on its orbit. Sun-synchronous orbit from a top view of the ecliptic plane with local solar time (LST) zones for reference and a descending node of 10:30. For example, a satellite in Sun-synchronous orbit might ascend across the equator twelve times a day, each time at approximately 15:00 mean local time. This consistent lighting is a useful characteristic for satellites that image the Earth's surface in visible or infrared wavelengths, such as weather and spy satellites, and for other remote-sensing satellites, such as those carrying ocean and atmospheric remote-sensing instruments that require sunlight. More technically, it is an orbit arranged so that it precesses through one complete revolution each year, so it always maintains the same relationship with the Sun.Ī Sun-synchronous orbit is useful for imaging, reconnaissance, and weather satellites, because every time that the satellite is overhead, the surface illumination angle on the planet underneath it is nearly the same. Dates are shown in white: day/month.Ī Sun-synchronous orbit ( SSO), also called a heliosynchronous orbit, is a nearly polar orbit around a planet, in which the satellite passes over any given point of the planet's surface at the same local mean solar time. A non-Sun-synchronous orbit (magenta) is also shown for reference. Backup software for the PC: powerful, easy to use solution for backing up and synchronising files on a local/network drive, the cloud, FTP server and more.Diagram showing the orientation of a Sun-synchronous orbit (green) at four points in the year. Fast, secure and Free Open Source software downloads Copyright ©2011, Matúš Tomlein. Have a look at the documentation to learn about all the features of Synkron. ![]() Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others. Free backup software to store backups online with strong encryption. FreeFileSync is a free open source data backup software that helps you synchronize files and folders on Windows, Linux and macOS. Syncthing replaces proprietary sync and cloud services with something open, trustworthy and. rsync uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync. rsync is a file transfer program for Unix systems. What are some alternatives? When comparing GoodSync and Allway Sync, you can also consider the following products ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |