IMHO Arianespace is not able to send any spacecraft, incl. an ATV, to dock with the (fake) ISS or to leave orbit and stop at the L2 point.
Well, it looks like your Humble Opinion is totally up the creek
Arianespace Flight VV06 / LISA Pathfinder, Arianespace
I explain why at my website - http://heiwaco.com/moontravel.htm#B
No, you don't explain anything except that you can't understand anything about space missions above LEO.
Them you claim that since the smartest person in the world (you) can't understand these things, they must be impossible.
Well, Mr Heiwa you certainly aren't the sharpest knife in the drawer, so maybe you're wrong.
Well, it is a nice story but there is no evidence that LISA Pathfinder ever left any orbit direction the Sun and after 50 days stopped at the L2 point. It seems that Arianespace is an active co-conspirator of that nonsense. I am not surprised at all. I have to update http://heiwaco.com about it.
Yes,
Mr Anders Björkman, for once I have to admit that you are 100% correct, "there is no evidence that LISA Pathfinder ever left any orbit direction the Sun and
after 50 days stopped at the L2 point." because:
- LISA did not head for the "L2 point"! "The entire journey, from launch to arrival at L1 took approximately six weeks."
Note L2 is not the same as L1.
- And "there is no evidence that LISA Pathfinder . . . . . after 50 days stopped at the L2 point."
LISA did not stop at any Lagrange point, but: "A month after its final burn, it . . . . . . settled into an orbit around the L1 Sun-Earth Lagrangian point."
Note again, "settled into an orbit around the L1 Sun-Earth Lagrangian point." is not the same as "stopped at the L2 point".
Then like the idiot, I am I wasted more precious time looking up your site.It says nothing other than that you are
totally ignorant on rockets, orbital mechanics, orbital dynamics, aero-braking and heat-shield operation.
Look,
Mr Anders Björkman:
- There are numerous people on this earth more intelligent than you - at a rough guess I'd say about 3,000,000,000.
But very very few of those pretend to have any knowledge of this material as you do.
- In the real world no one person would pretend, like you do, to have the expertise and knowledge to plan these trajectories.
So, as I keep trying to hammer into your thick skull, all your site has is you claiming that because
Mr Anders Björkman, the proven ignoramus on orbital mechanics, cannot understand the various sorts of orbits that they are impossible.
Well, they are not impossible!
But it is not so easy to put an artificial spacecraft in orbit around the Sun or Moon starting from Earth unless you go to the L1/2 points.
Actually doing these manoeuvres is not that hard, but
the planning and timing is definitely "hard" and needs detailed expertise and knowledge in orbital dynamics and astronomy.
If you have too little speed leaving Earth vertically straight up like an ICBM, you will soon drop straight back on Earth due to the Earth gravity force (like an ICBM) and go faster and faster and be vaporized at re-entry. No orbit!
Why would anyone in their right mind, except maybe YOU, leave the "
Earth" to go to the moon, L1 or Mars heading "vertically straight up like an ICBM"?
Of course, if you do the wrong manoeuvre, as you obviously would, it goes all wrong!
If you manage to get away from Earth gravity force to be caught by Sun or Moon gravity forces but have too little speed to orbit the Sun or the Moon, you will first go slower and slower away from Earth and then be pulled into the Sun or Moon at increased speed by Sun or Moon gravity forces and crash. No orbit!
Sure, "If you manage to get away from
Earth gravity force" in the
wrong trajectory you might "be caught by Sun or Moon
gravity forces.
But a competent orbital planner does not "get away from
Earth gravity force"
in the wrong trajectory.
And if you have too much speed or go in the wrong direction, you will speed off into the Milky way or Universe and be lost forever. No orbit!
Of course you would, but as I said, "a competent orbital planner does not" plan a trajectory like that.
In all cases you cannot stop and get away from the unknown trajectory you are in. You are going too fast or too slow or in the wrong direction and have no fuel/energy to carry you home and ... you don't know, where you are. Satellite orbits are always one-way.
Of course "you cannot stop and get away from the unknown
trajectory you are in", but "a competent orbital planner does not" plan a trajectory like that.
You apply a force (by firing a rocket) at departure from ground and enter an orbit at the right speed, altitude and direction ... and you'll be there forever. If you have extra fuel aboard, you can do simple manouvers in space; e.g. increase the altitude of your Earth orbit. But you cannot return and land on a rotating Earth. There are no means to brake! You have no fuel for it.
You again demonstrate your total ignorance of orbital mechanics, aero-braking and the operation of heat-shields.
If you enter or leave orbit at the wrong, slow or high speed or too low altitude, you will sooner or later crash somewhere or disappear in the universe.
Of course, if you do it wrong, it fails - why do you keep harping on that?
A competent operator does not "enter or leave
orbit at the wrong, slow or high speed or too low altitude" otherwise they crash.
Have you looked at the video from onboard the LM on the Apollo 10 mission?
As the LM tried an "abort manoeuvre" a "human error" put them within 2 seconds of crashing into the lunar surface!
Now, down to the issue at hand, the trajectory of ESA's LISA Pathfinder Mission.You have noted that ESA didn't even use one of the
Ariane series space launchers but the "little"
Vega.
ESA did not launch the
LISA Pathfinder "package" directly at the Sun or L1, but
Vega placed the spacecraft into an elliptical orbit with perigee at 200 km, apogee at 1540 km and an inclination of about 6.5°.
then (this is my interpretation only) into a
Hohmann Transfer orbit about the earth with a perigee of 1540 km above the earth and apogee
roughly 1,800,000 km to pass on the
sun side of L1 then a burn to put the package into in the "500 000 km × 800 000 km Lissajous orbit around L1".
Now, I won't pretend that I could successfully plan such a mission, but if you want to learn a little of how it is done read this:
Mission design for LISA Pathfinder, M Landgraf, M Hechler, and S KembleThis quote gives a rough idea of the orbit taken:
LISA Pathfinder's journey through space. Credit: ESA/ATG medialab |
The operational orbit for LISA Pathfinder is a 500 000 km × 800 000 km Lissajous orbit around L1. This orbit has been chosen because it is an intrinsically 'quiet' place in space, far away from massive bodies, which induce tidal forces on the spacecraft; has constant illumination from the Sun; and has a quasi-constant distance from Earth for communication. This orbit fulfils the stringent requirements of LISA Pathfinder concerning thermal and gravitational stability.
This Lissajous orbit, with period of 180 days, is unstable and periodic station-keeping manoeuvres will be required - amounting to about 1.8 ms-1 per year - which will be performed using the cold gas thrusters of the spacecraft's micro-propulsion system.
From: lisa pathfinder, MISSION OPERATIONS: OVERVIEW
But, your site simply describes in detail how,
Mr Anders Björkman doesn't understand all this, therefore it must be impossible
- wrong!.
I on the other hand,
know that I do not have the expertise, knowledge or data to plan such a mission, but I do understand enough to know that it is quite feasible.
Heiwa, I implore you! Take
Mark Twain's helpful advice:
It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt.