The R.A. Difference is the difference between the Geocentric Right Ascension of the satellite and its (precessed) R.A. of Ascending Node: Da = a_{g} - a_{W}(t) Rearranging the terms, the Geocentric Right Ascension (a_{g}) coordinate of the Satellite can be found by using the following equation: a_{g }= Da + a_{W}(t) - 360^{o} { INTEGER [ (Da + a_{W}(t)) / 360^{o} ] } a_{g} = 14^{o}.9188694 The Geocentric Declination (d_{g}) coordinate of the satellite can be determined by using the following equation: d_{g} = [SIGN (sinm(t))] cos^{-1} [ cosm(t) / cosDa ] IMPORTANT NOTE: When using this equation, please keep in mind that the SIGN (sinm(t)) term means that only the sign of the result is to be used (+1 or -1) and not the value of the sine itself. SIGN (sinm(t)) is used only to determine the sign of the geocentric declination (above or below the celestial equator).
d_{g}
= +44^{o}.73125163 |
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Step 9: Finding the Geocentric Coordinates Was Last Modified On April 01, 2014 |