- #1
Hare
- 3
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Hi.
Ok, so I'm trying to understand the "navigation equations".
n: frame traveling on Earth with vehicle.
e: frame centered in earth, rotating with it.
P: Position of vehicle center of gravity.
v[itex]^{n}_{P/e}[/itex] = (vn,ve,vd): velocity of P w.r.t to e-frame, expressed in n-frame.
Normally you don't integrate this, but uses vn,ve,vd to calculate the derivative of longitude,latitude,height and then integrate these to get position in longitude,latitude,height.
BUT, my question is: what do you get if you integrate vn,ve,vd?
I mean, normally when you integrate vectors:
- the frame is fixed in space
- you have a velocity w.r.t this frame
- and you just integrate each component separately
But now
- the frame is rotating
- velocity is not w.r.t this frame
Any thoughts?
/Jonas
Ok, so I'm trying to understand the "navigation equations".
n: frame traveling on Earth with vehicle.
e: frame centered in earth, rotating with it.
P: Position of vehicle center of gravity.
v[itex]^{n}_{P/e}[/itex] = (vn,ve,vd): velocity of P w.r.t to e-frame, expressed in n-frame.
Normally you don't integrate this, but uses vn,ve,vd to calculate the derivative of longitude,latitude,height and then integrate these to get position in longitude,latitude,height.
BUT, my question is: what do you get if you integrate vn,ve,vd?
I mean, normally when you integrate vectors:
- the frame is fixed in space
- you have a velocity w.r.t this frame
- and you just integrate each component separately
But now
- the frame is rotating
- velocity is not w.r.t this frame
Any thoughts?
/Jonas