"' Section C : SUN "'covers detailed positional information on the Sun, including the ecliptic and equatorial coordinates, physical ephemerides, geocentric rectangular coordinates, times of transit, and the equation of time.
32.
What the guide says means : if you have the rectangular coordinates for a point then atan2 ( y, x ) will give you one of its polar coordinates . & mdash; Tamfang 03 : 19, 9 July 2007 ( UTC)
33.
The earliest surviving world maps based on a rectangular coordinate grid are attributed to al-Mustawfi in the 14th or 15th century ( who used invervals of ten degrees for the lines ), and to Hafiz-i Abru ( died 1430 ).
34.
Which is identical to the equation for the Euclidean metric in three-dimensional configuration space, suggests the notion of a k-vector in three-dimensional " k-space ", defined ( for propagating plane waves ) in rectangular coordinates as:
35.
In rectangular coordinates with the screen lying in the Y Z plane, with the Z axis upward and the Y axis to the right, with the viewer centered along the X axis; we find that the screen coordinates are simply the sum of two terms.
36.
The plane wave spectrum arises naturally as the eigenfunction or " natural mode " solution to the homogeneous electromagnetic wave equation in rectangular coordinates ( see also Electromagnetic radiation, which derives the wave equation from Maxwell's equations in source-free media, or Scott [ 1998 ] ).
37.
:\ hat { g } \, and \ hat { h } \, are the base vectors of the rectangular coordinate system in the plane of the reference Kepler orbit with \ hat { g } \, in the equatorial plane towards the ascending node and u \, is the polar argument relative this equatorial coordinate system
38.
With this end in view he expounded to the Berlin Academy in 1849 a mode of determining an elliptic orbit from three observations, and communicated to that body in 1851 a new method of calculating planetary perturbations by means of rectangular coordinates ( republished in W . Ostwald's " Klassiker der exacten Wissenschaften ", No . 141, 1903 ).
39.
Where " C " 1 and " C " 2 are constants that depend on the rotation rates of the cylinders . ( Note that " r " has replaced " y " in this result to reflect cylindrical rather than rectangular coordinates . ) It is clear from this equation that curvature effects no longer allow for constant shear in the flow domain, as shown above.
