Re: [Orekit Developers] TimeStampedCache Improvements

[Evan Ward <evan.ward@nrl.navy.mil>]

MAISONOBE Luc wrote:
>
> Hi Evan,
>
> Evan Ward <evan.ward@nrl.navy.mil> a écrit :
>
>>
>> I have the refactoring finished, but two test cases that use empty EOP
>> histories are failing. What should the behavior be when the user
>> requests a frame that uses EOP data, but none is available? Currently a
>> null correction is used when there are less than 4 EOP entries or when
>> there is no data for the date. Is this the intended behavior? IMHO an
>> exception should be thrown in both cases because a frame with the
>> requested accuracy can not be created. (the fail fast strategy)
>
>
> I don't agree.
> My rationale is that Orekit can be used in mission analysis cases,
> where time ranges from dates for which EOP corrections are available
> to dates where EOP corrections are not available yet. For such cases,
> the best guess is to use 0 correction. Of course, in this case the
> user could ask for not applying the correction, but I'm not sure
> forcing this him/her to do that is good.

Ok. That is a little different UTCScale, which throws an exception when
there is no data. I'll add a comment to FramesFactory explaining that
EOP corrections are only used if they are available.

Evan

>
> Luc
>
>>
>>
>> Regards,
>> Evan
>>
>>
>
>
>
>
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