Difference between revisions of "Scott Manley YouTube Index"

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OrbitMFD is a multi-functional display that is included in the Orbiter basic package. The MFD displays the orbit of the vessel the user has control and the body the ship is orbiting as well as the orbit of a target vessel or natural body.
 
OrbitMFD is a multi-functional display that is included in the Orbiter basic package. The MFD displays the orbit of the vessel the user has control and the body the ship is orbiting as well as the orbit of a target vessel or natural body.
  
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== Operation ==
 
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To use OrbitMFD, the user turns power on a multifunctional display if it's not on, then selecting the SEL button at the bottom, the user then selects OrbitMFD. The body the vessel is orbiting is shown as a gray circle, the vessel's orbit is shown in green, and the target vessel or body is shown in green and the target vessel or body is shown in yellow. Each orbit also indicates the apoapsis as a open circle and the periapsis is indicated as a solid circle, each on opposite sides of the orbit from one another. A dotted line between them indicates the line of nodes where the vessel's orbital plane crosses the orbital plane of the target.
 
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The orbits are shown in the frame of reference of either the parent body's equatorial plane or the ecliptic, and can te switched with the FRM button. The point of view in the display is projected either from the plane of the ecliptic or from the plane of the vessel's orbit, selected by the PRJ button. By selecting the DST button, the periapsis, apoapsis, and the vessel's altitude is displayed as radius from the center of the body, or as distances from the body's surface. By selecting the MOD button, the display will show the osculating elements or the body and orbits, or both.
 
  
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== Oscultating elements ==
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Parameters displayed are:
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== Display Modes ==
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{|class="wikitable" border="2" style="text-align: center"
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Orbital Elements displayed are:
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{|class="wikitable" border="2"  
 
|'''MFD Label'''||'''Element'''||'''Unit of Measure'''||'''Description'''
 
|'''MFD Label'''||'''Element'''||'''Unit of Measure'''||'''Description'''
 
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|SMa||Semimajor Axis||m, km, AU||one-half the sum of Apoapsis and Periapsis
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|SMa||Semimajor Axis||m, km, AU||One-half the sum of the major diameter (Apoapsis and Periapsis). If Ecc ≥ 1, SMa will show a negative number
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|SMi||Semiminor Axis||m, km, AU||one-half of the minor axis
 
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|PeR||Periapsis Radius||m, km, AU||radial distance from the center of the central body to the low point of the orbit
 
 
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|PeA||Periapsis Distance||m, km, AU||
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|SMi||Semiminor Axis||m, km, AU||One-half of the minor axis
 
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|ApR||Apoapsis Radius||m, km, AU||
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|PeR<br>PeA||Periapsis Radius<br>Periapsis Distance||m, km, AU||Radial distance from the center of the reference body to the low point of the orbit<br>Radial distance from the surface of the body to the low point of the orbit
 
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|ApA||Apoapsis Distance||m, km, AU||
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|ApR<br>ApA||Apoapsis Radius<br>Apoapsis Distance||m, km, AU||Distance from the center of the reference body to the high point of the orbit<br>Radial distance from the surface of the body to the high point of the orbit
 
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|Rad||Radius Vector||m, km, AU||
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|Rad<br>Alt||Radius Vector<br>Altitude||m, km, AU||Radial distance from the center of the reference body to the vessel<br>Radial distance from the surface of the reference body to the vessel
 
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|Alt||Altitude||m, km, AU||
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|Ecc||Eccentricity||0 - ∞||Measure of how circular or non-circular the orbit is. Circle = 0, ellipse = >0 to <1, Parabola = 1, Hyperbola >1
 
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|Ecc||Eccentricity||0 - ∞||
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|T||Orbital Period (Time)||Seconds||How long it takes to make one revolution
 
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|T||Orbital Period (Time)||Seconds||
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|PeT||Time to next Perapsis||Seconds||How long until the next periapsis, if past the periapsis
 
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|PeT||Time to next Perapsis||Seconds||
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|ApT||Time to next Apoapsis||Seconds||How long until the next apoapsis, if Ecc ≥  will show N/A
 
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|ApT||Time to next Apoapsis||Seconds||
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|Vel||Velocity||m/s|| How fast the body is going
 
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|Vel||Velocity||m/s||
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|Inc||Inclination||Degrees (°)|| Vertical tilt of orbit in reference to the ecliptic or the equator of the reference body
 
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|Inc||Inclination||Degrees (°)||
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|LAN||Longitude of Ascending Node||Degrees (°)||Horizontal orientation of the line of ascending node with respect to the vernal equinox
 
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|LAN||Longitude of Ascending Node||Degrees (°)||
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|LPe||Longitude of Periapsis||Degrees (°)||Angle measured from the vernal equinox to the peiapsis as if the inclination is zero
 
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|LPe||Longitude of Periapsis||Degrees (°)||
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|AgP||Argument of Periapsis||Degrees (°)||Angle measured from the ascending node to the periapsis
 
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|AgP||Argument of Periapsis||Degrees (°)||
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|TrA||True Anomaly||Degrees (°)||Position of the body along the orbit from the periapsis
 
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|TrA||True Anomaly||Degrees (°)||
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|TrL||True Longitude||Degrees (°)||Position of the body along the ecliptic from the vernal equinox
 
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|TrL||True Longitude||Degrees (°)||
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|MnA||Mean Anomaly||Degrees (°)||Ficticious position of the body along the orbit from the perapsis as if it was moving at a constant velocity
 
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|MnA||Mean Anomaly||Degrees (°)||
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|MnL||Mean Longitude||Degrees (°)||Ficticious position of the body along the orbit from the perapsis as if it was moving at a constant velocity
 
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|MnL||Mean Longitude (°)||
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|G||Gravity contributiion||||Releative fraction of gravity of the reference body to the total gravitational field of the vessel
 
|}
 
|}

Revision as of 12:12, 13 April 2021

OrbitMFD is a multi-functional display that is included in the Orbiter basic package. The MFD displays the orbit of the vessel the user has control and the body the ship is orbiting as well as the orbit of a target vessel or natural body.


Display Modes

Orbital Elements displayed are:

MFD Label Element Unit of Measure Description
SMa Semimajor Axis m, km, AU One-half the sum of the major diameter (Apoapsis and Periapsis). If Ecc ≥ 1, SMa will show a negative number
SMi Semiminor Axis m, km, AU One-half of the minor axis
PeR
PeA		 Periapsis Radius
Periapsis Distance		 m, km, AU Radial distance from the center of the reference body to the low point of the orbit
Radial distance from the surface of the body to the low point of the orbit
ApR
ApA		 Apoapsis Radius
Apoapsis Distance		 m, km, AU Distance from the center of the reference body to the high point of the orbit
Radial distance from the surface of the body to the high point of the orbit
Rad
Alt		 Radius Vector
Altitude		 m, km, AU Radial distance from the center of the reference body to the vessel
Radial distance from the surface of the reference body to the vessel
Ecc Eccentricity 0 - ∞ Measure of how circular or non-circular the orbit is. Circle = 0, ellipse = >0 to <1, Parabola = 1, Hyperbola >1
T Orbital Period (Time) Seconds How long it takes to make one revolution
PeT Time to next Perapsis Seconds How long until the next periapsis, if past the periapsis
ApT Time to next Apoapsis Seconds How long until the next apoapsis, if Ecc ≥ will show N/A
Vel Velocity m/s How fast the body is going
Inc Inclination Degrees (°) Vertical tilt of orbit in reference to the ecliptic or the equator of the reference body
LAN Longitude of Ascending Node Degrees (°) Horizontal orientation of the line of ascending node with respect to the vernal equinox
LPe Longitude of Periapsis Degrees (°) Angle measured from the vernal equinox to the peiapsis as if the inclination is zero
AgP Argument of Periapsis Degrees (°) Angle measured from the ascending node to the periapsis
TrA True Anomaly Degrees (°) Position of the body along the orbit from the periapsis
TrL True Longitude Degrees (°) Position of the body along the ecliptic from the vernal equinox
MnA Mean Anomaly Degrees (°) Ficticious position of the body along the orbit from the perapsis as if it was moving at a constant velocity
MnL Mean Longitude Degrees (°) Ficticious position of the body along the orbit from the perapsis as if it was moving at a constant velocity
G Gravity contributiion Releative fraction of gravity of the reference body to the total gravitational field of the vessel
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