[Difx-users] DiFX Software for Satellite Data Processing {External}

[Adam Deller]

Hi De Wu,

The correlation code itself doesn't know or care about the nature of the
source; it just applies delays based on the sampled polynomials it is
given.  difxcalc is capable of generating delay models for near-field
objects using NASA's SPICE code, however I would caution that this is a
rarely used and hence rarely tested mode.  Some (minimal) documentation is
given on https://www.atnf.csiro.au/vlbi/dokuwiki/doku.php/difx/spacecraft
and the vex2difx page it links to, under the SOURCE block.

Cheers,
Adam

On Fri, 25 Aug 2023 at 18:52, 深空探测 <wude7826580 at gmail.com> wrote:

> Dear all,
>
> I am currently using DiFX-2.6.2 software for my data processing needs.
> After employing the 'startdifx' command to generate the .im files, I have
> noticed that the generated .im files contain delay data for radio sources.
> However, my intention is to process data from artificial satellites. Given
> that the positions of artificial satellites change rapidly, the delay data
> in the .im files calculated based on the radio source model might not be
> suitable.
>
> In light of this, I am reaching out to inquire whether the DiFX software
> includes dedicated modules for handling artificial satellite data.
> Specifically, I am curious to know if there is a provision within the
> software to calculate delay data in accordance with the operational mode of
> artificial satellites. I am assuming that I would be providing the known
> orbital data of the satellites as input.
>
> Your guidance and insights on this matter would be greatly appreciated.
> Thank you in advance for your assistance.
>
> Best regards,
>
> De Wu
>


-- 
!=============================================================!
Prof. Adam Deller
Centre for Astrophysics & Supercomputing
Swinburne University of Technology
John St, Hawthorn VIC 3122 Australia
phone: +61 3 9214 5307
fax: +61 3 9214 8797
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