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Re: 20030307: NEXRAD Level II data format (cont.)

Tom,

Sorry, the software build released on 3/31/04 is the earliest that can 
be accommodated. The NEXRAD agencies have a process for identifying 
software to be included in builds.  The builds are released at the end 
of March and end of September each year.  The September 2003 build is 
already in the test phase and we do not want to add items to the build 
at this late phase unless directly related to operational impacts on 
the radar.


Tim


----- Original Message -----
From: Unidata Support <address@hidden>
Date: Saturday, March 8, 2003 10:45 am
Subject: 20030307: NEXRAD Level II data format (cont.)

> >From: "Tim D Crum" <address@hidden>
> >Organization: US DOC/NOAA/NWS/NEXRAD OSF
> >Keywords: 200303072240.h27MeAB2006073 IDD CRAFT NEXRAD Level II
> 
> Hi Tim,
> 
> re: format of NEXRAD Level II data
> 
> >There are two answers, depending on whether you are looking at 
> Level II
> >data recorded on tape or transmitted electronically.
> 
> The links you provided are very helpful.  Thank you for the quick 
> response!
> Regarding your comment about station information in volume scan data:
> 
>  "For tape-recorded Level II data, at the start of each volume 
> scan a
>  header record is appended that provides metadata that contains site
>  info and site performance information.  That being said, the data
>  transmitted in real time does not have the metadata.  Until the
>  spring of 2004, that will be the case for all electronically
>  transmitted data.  In spring 2004 the metadata will be added to the
>  Level II data stream."
> 
> We are pleased that the station and performance metadata will
> eventually be included along with the scan data, but we are wondering
> if the schedule for adding it could be accelerated?  It would be most
> useful to our display and anaylsis developers to be able to 
> interrogatedataset elements to obtain this information directly 
> and not have to
> rely on conventions like file naming/directory storage to 
> determine the
> location of the data.  Our goal is to develop and mature our packages
> using CRAFT data and then have a seamless transition to the eventual
> NWS datastream.
> 
> Again, thank you for your timely response.
> 
> Cheers,
> 
> Tom
> 
> >1.  For tape the ROC web page (
> >http://www.roc.noaa.gov/ssb/cm/icd_downloads.asp) has information on
> >how to obtain the Interface Control Document (ICD):
> >
> >ICD:   2620010
> >BUILD:   10.0
> >Build 10.0: This document defines the NEXRAD Archive II 
> Interface. It
> >describes Archive II hardware and software interfaces and 
> provides user
> >information on the format of some of the data stored on tape. This
> >archival storage system can interface with either the RDA Status and
> >Control (RDASC) Processor (CI-05) for read/write operations under
> >CPCI-01 and CPCI-03 program control, or the read operations under
> >CPCI-24 program control.
> >
> >2.  For electronically transmitted data:
> >The ROC web page ( http://www.roc.noaa.gov/ssb/cm/icd_downloads.asp)
> >has information on how to obtain the Interface Control Document 
> (ICD):>ICD:   2620008A OPEN BUILD:   1.0 Open Build 1.0: This 
> document defines
> >the interface providing base data from an RDA (Radar Data 
> Acquisition)>or RPG (Radar Produce Generation group) Computer to a 
> User site.
> >
> >For tape-recorded Level II data, at the start of each volume scan a
> >header record is appended that provides metadata that contains site
> >info and site performance information.  That being said, the data
> >transmitted in real time does not have the metadata.  Until the 
> spring>of 2004, that will be the case for all electronically 
> transmitted>data.  In spring 2004 the metadata will be added to 
> the Level II data
> >stream.
> >
> >Have I confused you now?  If so, call me at 405-366-6510 ext 1231.
> >
> >
> >Tim
> >
> >
> >
> >Unidata Support wrote:
> >
> >> >From: Unidata User Support <address@hidden>
> >> >Organization: UCAR/Unidata
> >> >Keywords: 200303072125.h27LPaB2005660 IDD NEXRAD Level II data 
> format>>
> >> Hi Tim,
> >>
> >> Can you point us in the direction of comprehensive information 
> on the
> >> format of the NEXRAD Level II data?  Also, do you know if pertinent
> >> station information in the data itself (e.g., station ID, lat, lon,
> >> elevation, etc.)?
> >>
> >> Thanks in advance...
> 
> Tom Yoksas
> 
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