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WDQMS - expected observations

WDQMS - expected observations

by Olivia Shuk-ming Lee -
Number of replies: 5

Dear All,

May I know how the WDQMS determine the 'expected' number?

Our SYNOP station, Hong Kong International Airport (WMO station number 45007), is reporting at 3-hour interval.  In that case the 'expected' number of observations for six hour and daily period should be 2 and 8 respectively.  However, I notice from WDQMS webpage that the 'expected' number of observations for six hour and daily period are 3 and 9 respectively.    I am a bit puzzled about this.

Regards,

Olivia Shuk-ming Lee
Hong Kong Observatory


In reply to Olivia Shuk-ming Lee

Re: WDQMS - expected observations

by Timo Proescholdt -

Dear Olivia Shuk-ming Lee,

there is indeed an issue with the way the number of expected observations are calculated for Hong Kong International Airport. It is a combination of the particular way you introduced the schedules plus our algorithm doing the calculations.

As you do 7/24 3h observations, the "normal" way to introduce them would be 00:00->23:59 with a 3h interval (possibly 20h diurnal basetime). However, 20:00->19:59 with 3h can also be used, but presents the algorithm with some challenges in some cases, as can be seen.

We will work on a fix. In the meantime you could update (correct) in OSCAR/Surface the schedule definitions to the recommended format, unless there is a reason to use the 20:00->19:59 "style".

I am actually curious why you choose to represent the schedules in this way. We are aware of the lack of guidance on the schedules and will elaborate guidelines and for this reason it is important to understand how different users interpret the current schedules.

with very best regards and apologies for the complications,

Timo



In reply to Timo Proescholdt

Re: WDQMS - expected observations

by Olivia Shuk-ming Lee -

Dear Timo,

Thanks a lot for your advice.  I have corrected the schedule to "00:00->23:59".  

There are no particular reasons for the "20:00->19:59" schedule.  Originally we think that for a 7x24 observations, we can input any beginning time in schedule, so long as the ending time is 23 hours and 59 minutes after.  

Regards,

Olivia 

In reply to Timo Proescholdt

Re: Droit limité

by Quentin MOKOKO YOKA -

Bonjour,
J'ai constaté sur mon compte Oscar/surface mes droit sont limité. L'accès à l'API Oscar est limité sur le compte d'accès Oscar, le compte est limité sur plusieurs fonctionnalité de la plateforme Oscar tel que la fonctionnalité:
- reference data: instruments,methods,variables,organisations,programses;
-Admnistration: user management,aydit logs.
Je sollicite une aide de votre part pour travailler en coordination avec le point focal wigos.

In reply to Timo Proescholdt

Re: Droit limité

by Quentin MOKOKO YOKA -
Bonjour,J'ai constaté sur mon compte Oscar/surface mes droit sont limité. L'accès à l'API Oscar est limité sur le compte d'accès Oscar, le compte est limité sur plusieurs fonctionnalité de la plateforme Oscar tel que la fonctionnalité:- reference data: instruments,methods,variables,organisations,programses;-Admnistration: user management,aydit logs.Je sollicite une aide de votre part pour travailler en coordination avec le point focal wigos.
In reply to Timo Proescholdt

Re: WDQMS - expected observations

by iqbal iqbal -
Dear Proescholdt,

I check in WDQMS web tool to WIGOS-ID: 0-20000-0-96749 (Jakarta Soerkarno Hatta Airport), expected six hour is 6 and expected daily is  24. regarding that state, there are questions:
1. expected observation 6 hours is 6. I'm really curious,  could explain how to get 6 times ?  in my mind  it could be 4(00, 06, 12, 18 UTC) 
2. that station send data though GTS every 3 hours(00, 03,06,09,12,15,18,21 UTC) event operate 24 hours, in my opinion   expected could be 8. is it correct ?
  
thanks very much for the attentions

Iqbal
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