[Nexus] Question about start_time field

[Filipe Maia]

Hi Henrik,

I think setting it to when the actual scan starts is the more logical
choice.

Cheers,
Filipe

On Fri, 9 Jul 2021 at 09:33, Henrik Enquist via NeXus <
nexus at shadow.nd.rl.ac.uk> wrote:

> Hi,
>
> We are looking at the nexus output of Sardana, and a question came up
> about the exact meaning of scan_start.
>
>
> https://manual.nexusformat.org/classes/applications/NXscan.html#nxscan-entry-start-time-field
>
>
> We have the choice of setting it to the exact time when the user started
> the scan macro, or when the actual scan starts. The documentation linked
> above does not mention any details. In many cases these two will be so
> close that it doesn't make any practical difference. But if for example a
> large prescan snapshot is taken, then they can be a number of seconds apart.
>
>
> So the question is, which time should we put in the start_time? The time
> when the user pressed the button, or the time when the scan started
> running?
>
>
> I tried sending this yesterday but I probably did it a little too early,
> before my registration on the list was completed. Sorry if this causes any
> noise.
>
>
> Cheers,
>
> Henrik
>
>
>
> ----
> Dr. Henrik Enquist
> Control Software Engineer
> MAX IV Laboratory
> Fotongatan 2
> 221 00, Lund
> Sweden
>
> Phone: +46 (0)272 15 45 45
> Email: henrik.enquist at maxiv.lu.se
> Web: www.maxiv.lu.se
>
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