Is there a document anywhere that explains every option for MechJeb2's Prime Vector Guidance?

[bigyihsuan]

As far as I know there is no single document that outlines the options for MechJeb2's Prime Vector Guidance; most only go over the basics of getting to orbit and not much else. Specifically, I'm looking for information about the Attach Altitude option, and "Launch to LAN" and similar buttons.

Here are the guides I've found:

• KSP-RO's RealismOverhaul guide
• KSP-RO's RP-0 guide, which doesn't go into enough detail as I'd like
• Unofficial BDB Wiki's guide
• MechJeb2 Github Wiki which links to a 404 page for more information about PEG.

My questions in particular are:

• When and how should I use the "Attach Altitude" option? Can I use it for lofted trajectories?
• What is the abbreviation "LAN" in "Launch to LAN"?

[Zelda]

On 4/25/2022 at 7:27 AM, bigyihsuan said:

As far as I know there is no single document that outlines the options for MechJeb2's Prime Vector Guidance; most only go over the basics of getting to orbit and not much else. Specifically, I'm looking for information about the Attach Altitude option, and "Launch to LAN" and similar buttons.

Here are the guides I've found:

• KSP-RO's RealismOverhaul guide
• KSP-RO's RP-0 guide, which doesn't go into enough detail as I'd like
• Unofficial BDB Wiki's guide
• MechJeb2 Github Wiki which links to a 404 page for more information about PEG.

My questions in particular are:

• When and how should I use the "Attach Altitude" option? Can I use it for lofted trajectories?
• What is the abbreviation "LAN" in "Launch to LAN"?

Unfortunately I can't help you with the MechJeb questions, but LAN means Longitude of the Ascending Node. It's one of the key parameters that define an elliptical orbit. Basically, the point at which an inclined orbit crosses the equator.

If you need to place a vehicle into an inclined orbit, launching into an inclined orbit at a specific LAN means launching at a specific time. It will typically save a lot of dV over launching into an equatorial orbit and then performing a maneuver to change orbit to where you want it to be.

https://en.wikipedia.org/wiki/Longitude_of_the_ascending_node