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Munition samples may not be exactly on target, that is, the mean vector will not be (0,0). ... Percentiles can be determined by recognizing that the horizontal ...
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 not required, as each data line includes a unique object identifier code.
Simplified Deep Space Perturbations (SDP) models apply to objects with an orbital period greater than 225 minutes, which corresponds to an altitude of 5,877.5 km, assuming a circular orbit. [ 3 ] The SGP4 and SDP4 models were published along with sample code in FORTRAN IV in 1988 with refinements over the original model to handle the larger ...
Apotemnophilia can be associated with the strong belief or desire that one's external body is mismatched to one's true nature, [8] a phenomenon called body integrity identity disorder, [9] and the desire to undergo surgery to remove a limb. People who temporarily adopt the role or identity of an amputee have been called disability pretenders. [9]
5–10 Moderate Positional measurements could be used for calculations, but the fix quality could still be improved. A more open view of the sky is recommended. 10–20 Fair Represents a low confidence level. Positional measurements should be discarded or used only to indicate a very rough estimate of the current location. > 20 Poor
The effects of the ionosphere generally change slowly, and can be averaged over time. Those for any particular geographical area can be easily calculated by comparing the GPS-measured position to a known surveyed location. This correction is also valid for other receivers in the same general location.
Orbital position vector, orbital velocity vector, other orbital elements. In astrodynamics and celestial dynamics, the orbital state vectors (sometimes state vectors) of an orbit are Cartesian vectors of position and velocity that together with their time () uniquely determine the trajectory of the orbiting body in space.
Ground track example from Heavens-Above.An observer in Sicily can see the International Space Station when it enters the circle at 9:26 p.m. The observer would see a bright object appear in the northwest, which would move across the sky to a point almost overhead, where it disappears from view, in the space of three minutes.