National Climatic Data Center DATA DOCUMENTATION
FOR
TD7000 - TD7599
NEXRAD LEVEL III
September 1, 1998
National Climatic Data Center
151 Patton Ave.
Asheville, NC 28801-5001 USA
Table of Contents
TOPIC PAGE
________________________________________________________________ INTRODUCTION
1. Data Set ID (1)
2. Data Set Name (1)
3. Data Set Alias (1)
________________________________________________________________ DESCRIPTION
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4. Access Method and Sort for Archived Data (1)
5. Access Method and Sort for .B-7
6. Element Names B-7
7. B-8
8. B-8
9. B-8
10. B-8
11. B-8
赶集网人才招聘12. How to B-8
________________________________________________________________ DATA CENTER
13. Archiving B-8
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14. B-9
________________________________________________________________ DATA QUALITY
15. Known .B-9
16. B-9
17. Revision Date ...................................B-9
_______________________________________________________________ OTHER DATA SETS
18. Source B-9
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19. Esntial Companion B-9
20. Derived B-9
________________________________________________________________ SUMMARIZATION
中文翻译繁体字21. B-9
22. B-10
1. Data Set ID:
7000
2. Data Set Name:
NEXRAD LEVEL III
sir ian3. Data Set Alias:
a. Weather Surveillance Radar - 1988 Doppler (WSR-88D)
b. Radar Products Generator Data (RPG)
c. NEXRAD Products
4. Access Method and Sort for Archived Data:
factory是什么意思Optical disks containing Level III data are received at the National Climatic Data Center (NCDC) from the individual radar sites. The disks are procesd and inventories are produced. As time premits, the data on disk is extracted and stored on the NCDC Heirarchical Data Storage System (HDSS). Data on the HDSS may be requested through the NCDC Home Page. Any Level III data, whether stored on or off the HDSS, may be requested through the standard procedures for ordering data from the NCDC Ur Services Division.
The data are archived on optical disks received from each site in order by date/time.
There are numerous products on the disks with unique formats. The standard products available are listed below and the format type is indicated. Details of the specific formats are provided following this list and are copied from the NWS Interface Control Document for RPG/Associated PUP #2620001.
PRODUCT NAME NUMBER FORMAT TYPE Ba Reflectivity, 124nm elev. 1 19 Radial Ba Velocity, 124nm elev. 1 27 Radial VAD Wind Profile 48 Alphanumeric Echo Tops 41 Raster Vertically Integrated Liquid 57 Raster
1-Hour Precip. Accumulation 78 Raster Storm Total Precipitation 80 Raster Composite Reflectivity, 248nm 8-level 36 Raster Composite Reflectivity, 248nm 16-level 38 Raster
辅导网Mean Radial Velocity, 32nm 25 Radial Spectrum Width, 32nm elev. 1 28 Radial Spectrum Width, 124nm elev. 1 30 Radial
1
Digital Precipitation Array 81 Raster Supplemental Precip. Data 82 Raster Radar Coded Message 74 Alphanumeric Storm Structure 62 Alphanumeric Significant Weather Overlay-
Hail Index 59 Alphanumeric Mesocyclone 60 Alphanumeri
c Severe Weather Probability 47 Alphanumeric Storm Tracking Information 58 Alphanumeric Tornado Vortex Signiture 61 Alphanumeric FORMATS:
MSB HALFWORD LSB
MESSAGE HEADER
BLOCK
(e Figure 3-2)
PRODUCT DESCRIPTION
BLOCK
(Sheet 2 to 4)
PRODUCT SYMBOLOGY
BLOCK
(e Sheet 5)
GRAPHIC ALPHANUMERIC
BLOCK
(e Sheet 6)
2
TABULAR ALPHANUMERIC
BLOCK
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拥挤的(e Sheet 7)
Note: All blocks need not be ud. Any blocks that are ud must remain in the order shown.
Figure 3-5. Graphic Product Message
MSB HALFWORD LSB
MESSAGE MESSAGE CODE01
HEADER
BLOCK DATE OF MESSAGE02
TIME OF MESSAGE (MSW)03
TIME OF MESSAGE (LSW)04
LENGTH OF MESSAGE (MSW)05
LENGTH OF MESSAGE (LSW)06
SOURCE ID07
DESTINATION ID08
NUMBER OF BLOCKS09
Figure 3-2. Message Header (Sheet 1 of 2)
3
