User:Urwumpe

elgetliro OrbiterWiki administrator since december 2005

Lord of the block list

A/S/L: 27/M/Wolfsburg, germany

Occupation: Student and part-time software developer for satellite navigation applications.

Orbiter addon developer since summer 2003.

N-Mail: Urwumpe(ät)Yahoo(döt)com

Math formulas

Nodal regression

$P$	Orbit parameter, $p=a\cdot (1-\epsilon ^{2})$
$u$	corrected true anomaly, $u=\omega +\varphi$
$R_{E}$	mean planetary radius
$J_{2}$	non spherical gravity term
$i$	inclination
$\omega$	Argument of perigee
$\epsilon$	eccentricity

${\frac {d\Omega }{du}}=-3\cdot J_{2}\cdot ({\frac {R_{E}}{p}})\cdot \sin ^{2}{u}\cdot \cos {i}\cdot [1+\epsilon \cdot \cos {u-\omega }]$

Current Orbiter projects

• Ares V and Earth 2018 project
• Starstreak (suborbital spaceplane)
• Soyuz launcher meshes
• SRTM data-to-mesh converter