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[GEMPAK #YQA-343282]: Understanding EET entry for nex2gini.tbl

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  • Subject: [GEMPAK #YQA-343282]: Understanding EET entry for nex2gini.tbl
  • Date: Mon, 12 Oct 2015 10:19:00 -0600
> Hi Michael,
> 
> Curiousity killing the cat here, but I feel like I should know the answer.
> I am curious about the EET nex2gini.tbl entry:
> 
> EET        26    4 KFt,
> 
> 0,1,-9999,-9995;
> 2,71,0,70;
> 72,129,-9999,-9999;
> 130,199,0,70
> 
> TICZ99 CHIZ
> 
> Why does index 130 to 199 appear with the same data range as 2 to 71 ?
> 
> daryl

Hi Daryl,

EET consists of two data ranges within the 255 levels that correspond to 
heights between 0 and 70k ft, the first being heights and the second being 
"topped" heights, as described by the WSR-88D interface control document:

https://drive.google.com/file/d/1Y6V6qoSOTLHTmvZNuE6LoXBw_JucJbboO2jzf-1XggZ8dW5YOe_1-F_Mz-ebAqaCmtqHH8p-uOrW-9HT/view?usp=sharing

---

Echo top data shall be flagged to indicate the “topped” condition,
meaning echo tops may be higher than indicated. A Topped condition results when 
either the 
reflectivity is greater than the threshold of 18 dBZ at the top elevation scan, 
or when the value 
immediately above an 18+ dBZ value is bad and no other values at higher 
elevations are above 
threshold. Additionally, two values shall be reserved for “no data” and “bad 
data”. A sample bin is 
flagged “bad data” if the reflectivity was edited by the DQA algorithm. The 
value “no data” means 
there are no reflectivity data above threshold at the location of the sample 
bin. The flagged 
conditions can not be “topped”.

Ticket Details
===================
Ticket ID: YQA-343282
Department: Support GEMPAK
Priority: Normal
Status: Open