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Re: How to plot the magnetic field vector along the trajectory [message #59258 is a reply to message #59133]

Thu, 13 March 2008 05:40

duxiyu@gmail.com
Messages: 88
Registered: March 2007

Member

I am not sure what the 'idldemo' means and cannot find its information
in IDL Help.
Could you introduce it in detail?

Du

On Mar 13, 1:00 am, mankoff <mank...@gmail.com> wrote:
> On Mar 12, 11:09 am, Lasse Clausen <la...@lbnc.de> wrote:
>
>
>
>> On 12 Mar, 15:45, David Fanning <n...@dfanning.com> wrote:
>
>>> Lasse Clausen writes:
>>>> We are not throwing away anything, we are merely projecting into the
>>>> XY plane... ;-) You have to project somewhere as the computer screen
>>>> is not capable of displaying 3D - nor is paper, incidentally. And the
>>>> usual way to do this kind of thing is to provide three plots, one in
>>>> the XY plane, one in XZ and one in YZ. You then have to assemble the
>>>> 3D picture in your head.
>
>>> Or, you could envision an object graphics solution with
>>> an "earth" and "satellite" revolving around it, casting
>>> a shadow trajectory onto the earth with a magnetic vector
>>> rotating about in the plane of the satellite.
>
>>> All I'm saying is, the question lacked enough detail,
>>> for whatever good reason, to know how to form a sensible
>>> answer. And that when you ask better questions, you get--
>>> generally--better answers.
>
>>> I agree that this question was borderline for such a
>>> response. Even I could tell English was not the first
>>> language. But coming, as it did, at the end of a long
>>> day and after several seriously bad questions from the
>>> past week, I just thought a reminder might be useful. :-)
>
>>> Cheers,
>
>>> David
>>> --
>>> David Fanning, Ph.D.
>>> Fanning Software Consulting, Inc.
>>> Coyote's Guide to IDL Programming:http://www.dfanning.com/
>>> Sepore ma de ni thui. ("Perhaps thou speakest truth.")
>
>> As I said earlier, the question did not lack detail for me because I
>> have seen lots of these kind of plots before, so I was pretty sure
>> what was asked for. But I can also see that it would be confusing if I
>> hadn't seen these plots before.
>
>> More importantly, IDL can do that sort of thing? With shadows and all?
>> Object graphics I hear you say... Mmmm, so far I have ignored
>> everything involving object graphics. Well, maybe one fine day.
>
>> Cheers
>> Lasse Clausen
>
> Play around with "idldemo". There is a satellite orbiting the earth (I
> think with Ground Track). The earth is rotating. Clouds are rotating
> separately from Earth, etc.

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[Message index]

		How to plot the magnetic field vector along the trajectory By: duxiyu@gmail.com on Tue, 11 March 2008 20:05
		Re: How to plot the magnetic field vector along the trajectory By: mankoff on Thu, 13 March 2008 06:33
		Re: How to plot the magnetic field vector along the trajectory By: duxiyu@gmail.com on Thu, 13 March 2008 05:42
		Re: How to plot the magnetic field vector along the trajectory By: duxiyu@gmail.com on Thu, 13 March 2008 05:40
		Re: How to plot the magnetic field vector along the trajectory By: manodeep@gmail.com on Wed, 12 March 2008 14:30
		Re: How to plot the magnetic field vector along the trajectory By: mankoff on Wed, 12 March 2008 10:00
		Re: How to plot the magnetic field vector along the trajectory By: jdu on Wed, 12 March 2008 08:35
		Re: How to plot the magnetic field vector along the trajectory By: lasse on Wed, 12 March 2008 08:09
		Re: How to plot the magnetic field vector along the trajectory By: David Fanning on Wed, 12 March 2008 07:45

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