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The TLE format is a de facto standard for distribution of an Earth-orbiting object's orbital elements. A TLE set may include a title line preceding the element data, so each listing may take up three lines in the file, in which case the TLE is referred to as a three-line element set (3LE), instead of a two-line element set (2LE). The title is ...
Source code for algorithm implementations, and TLE interpretation in some cases: python-sgp4 A Python Implementation of the sgp4 model with automatic downloading of TLE Elements from NORAD database. PHP5 based on Gpredict; Java: SDP4 and predict4java; C++, FORTRAN, Pascal, and MATLAB. go-satellite GoLang implementation of SGP4 model and helper ...
Designators are assigned to objects by the United States Space Command along with satellite catalog numbers as they are discovered in space. [1] The United Nations Office for Outer Space Affairs (UNOOSA) and the National Space Science Data Center (NSSDC), part of NASA, maintain two catalogs that provide additional information on the launchers and payloads associated with the designators.
For orbit propagation purposes, there is a field for BSTAR drag in two-line element set (TLE) files, where it is to be given in units of inverse Earth radii. [2] The corresponding reference air density is given as 0.15696615 kg / ( m 2 ⋅ R Earth ) {\displaystyle 0.15696615{\text{ kg}}/(\mathrm {m} ^{2}\cdot R_{\text{Earth}})} . [ 3 ]
The Satellite Catalog Number (SATCAT), also known as NORAD Catalog Number, NORAD ID, USSPACECOM object number, is a sequential nine-digit number assigned by the United States Space Command (USSPACECOM), and previously the North American Aerospace Defense Command (NORAD), in the order of launch or discovery to all artificial objects in the orbits of Earth and those that left Earth's orbit. [1]
GoSatWatch from GoSoftWorks, supports multiple viewing sites (home, vacation spot, etc.), no internet connection required (one data is loaded and periodically updated). View satellite position on world map or a simple polar chart showing the path the satellite will take across your sky. [10]
Ku-band satellite 123.0°W: Galaxy 18: LS-1300: United States Intelsat: Television and radio broadcasting North America: 21 May 2008, [[Zenit Hybrid C/K u-band satellite 2008-11-19 121.0°W: Galaxy-23: FS-1300: United States Intelsat: Direct Broadcasting North America: 7 August 2003: Hybrid C/K u /K a-band satellite; C band payload referred to ...
Advanced Extremely High Frequency (AEHF) is a constellation of communications satellites operated by the United States Space Force.They are used to relay secure communications for the United States Armed Forces, the British Armed Forces, the Canadian Armed Forces, the Netherlands Armed Forces and the Australian Defence Force. [3]
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