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This set of models is often referred to collectively as SGP4 due to the frequency of use of that model particularly with two-line element sets produced by NORAD and NASA. These models predict the effect of perturbations caused by the Earth’s shape, drag, radiation, and gravitation effects from other bodies such as the sun and moon.
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]
NASA maintains civilian databases of GP orbital elements, also known as NASA or NORAD two-line elements. The GP element sets are "mean" element sets that have specific periodic features removed to enhance long-term prediction performance, and require special software to reconstruct the compressed trajectory .
Stargazers should prepare to lose sleep on Tuesday, Aug. 12, as two celestial sights unfold. The first event will be visible before sunrise and will feature the two brightest planets in the sky ...
The NORAD Tracks Santa app is also available in the Apple App and Google Play stores, and the tracker will be available on Facebook, Instagram, YouTube and X, according to NORAD.
Keplerian elements parameters can be encoded as text in a number of formats. The most common of them is the NASA / NORAD "two-line elements" (TLE) format, [4] originally designed for use with 80 column punched cards, but still in use because it is the most common format, and 80-character ASCII records can be handled efficiently by modern databases.
Since October 2023, online content creators such as Santulli have been filming these “silent reviews,” sharing their opinions of makeup, skin care, books and other products without speaking a ...
LAGEOS 1, launched 4 May 1976, NSSDC ID 1976-039A, NORAD number 8820 LAGEOS 2, deployed 23 October 1992 from STS-52 , NSSDC ID 1992-070B, NORAD number 22195 See also
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