Earth spaceports in Orbiter2016
OrbitMFD is an MFD that comes with the stock installation of Orbiter. It provides a graphical and numerical representation of a ship's orbit.
Credits
OrbitMFD is supplied with the stock installation of the Orbiter Spaceflight Simulator as provided by Dr Martin Schweiger and has been a part of the simulator since its inception.
Operation
OrbitMFD graphically shows the orbit of the ship in green and if a target is selected, the target's orbit, and a celestial body, typically the body with the most gravitational influence on the ship. Any body in the simulator can be selected to show the relation of the orbit to that body. In addition it will show a number of parameters. Pressing the SEL button on an MFD, OrbitMFD is the first MFD in the menu. The graphics will also display the ascending node with a solid square along the orbit, the descending node with an open square with a dotted line between the two, also the apoapsis with an open circle and periapsis with a solid circle. In addition, in the bottom center of the MFD, 'G' will show the amount of gravitational influence of the reference body (0 to 1.00), and will be green greater than 0.50, yellow less than 0.50.
| Orbit | X | The body about which the ship is orbiting automatically the body with the greatest gravitational influence on the ship, any body may be selected. |
| REF | Shift+R | Select the orbit reference body. |
| AR | Shift+A | OrbitMFD will select the reference body automatically, the body with the greatest gravitational influence on the ship. |
| TGT | Shift+N | Select a target vessel or natural body orbiting the same reference body. |
| NT | Shift+N | Deselects the target so that there is no target vessel or body. |
| MOD | Shift+M | Changes the display mode: Graphics + parameters, graphics only, or parameters only. |
| FRM | Shift+F | Frame of reference, equatorial or ecliptic. |
| PRJ | Shift+P | Orbital projection, reference frame, or ship's and target's frame. |
| DST | Shift+D | Switches parameters to distance from center of body or to altitude of mean radius of body. |
| HUD | Shift+H | Switches HUD to Orbit mode. |
| SMa | Semimajor axis (m, km, AU) | One-half the length of the long axis of the orbit |
| SMi | Semiminor axis (m, km, AU) | One-half the length of the short axis of the orbit |
| PeR PeA |
Periapsis radius (m, km, AU) Perapsis altitude (m, km, AU) |
Periapsis altitude from mean radius. |
| ApR ApA |
Apoapsis radius (m, km, AU) Apoapsis altitude (m, km, AU) |
Apoapsis altitude from mean radius. |
| Rad Alt |
Ship's current radius (m, km, AU) Ship's current altitude (m, km, AU) |
Ships current altitude from mean radius. |
| Ecc | Eccentricity | Circular = 0, Elliptical o - 1, Hyperbolic >1 |
| T | Period of Revolution (seconds) | How long it takes to go once around |
| PeT | Time remaining until Periapsis (seconds) | Time until the next low point in orbit |
| ApT | Time remaining until Apoapsis (seconds) | Time until the next high point in orbit |
| Vel | Velocity (m/s) | How fast the ship is going in its orbit |
| Inc | Inclination (°) | Orbital tilt from equator/ecliptic |
| LAN | Longitude of Ascending Node (°) | Measured from Vernal Equinox |
| LPe | Longitude of Periapsis (°) | Measured from Varnal Equinox |
| AgP | Argument of Periapsis (°) | Angle from ascending node to periapsis |
| TrA | True Anomaly (°) | Angle along the orbit from periapsis to current position |
| TrL | True Longitude (°) | Angle along the orbit from periapsis to current position if the inclination = 0 |
| MnA | Mean Anomaly (°) | Angle along the orbit from periapsis to current position if the orbit were circular |
| MnL | Mean Longitude (°) | Angle along the orbit from periapsis to current position if the orbit were circular |
- Semimajor Axis
- Semiminor axis
- Longitude of Ascending Node
- Longitude of Periapsis
- Argument of Periapsis
- Eccentricity
- Mean Anomaly
- Eccentric Anomaly
- True Anomaly
- True Longitude
- Mean Longitude