Re: [Orekit Users] Time of propagation DSSTPropagator

[paulcefo <paulcefo@buffalo.edu>]

Elisabet,

Can describe the test case in more detail?  Especially with respect to 
which short-periodic motion models are exercised?

cheers,

Paul

--
Dr. Paul J. Cefola
Consultant in Aerospace Systems, Spaceflight Mechanics, & Astrodynamics
Adjunct Faculty, Dept. of Mechanical and Aerospace Engineering, 
University at Buffalo (SUNY)

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paulcefo@buffalo.edu
paul.cefola@gmail.com

On 04/13/2016 9:02 am, Elisabet wrote:
> Hello,
>
> I have another question about the DSST and I would be grateful for your
> answers.
>
> I used the DSSTPropagator to propagate an orbit with perturbations due 
> to
> Earth, Moon and Sun and the drag force. For propagating an orbit during 
> 1
> year, I spent 45s which seems quite a lot. Whereas, whit only Earth’s
> perturbations, I spent 6s. I also tested the propagation without drag 
> which
> gave me also 45s and only with Erath and drag which gave me 34s. I used 
> the
> RangeKutta integrator and the DormandPrince integrator without founding
> noticeable differences between them.  The minimum step of time used was 
> 1h and
> maximum 1 day.
>
>  I am wondering if it is not too much time and why there is such a big
> difference when there are Moon and Sun perturbations.
>
> Best regards,
>
> Elisabet