Unidata IDD Data Streams Containing Radar Products

Current as of: March 19, 2014

FNEXRAD - National Composite

NEXRAD national composites are available on the FNEXRAD IDD data feed as PNG-compressed GINI images. The typical LDM pattern action to receive and file all composites is:

For individual products:

NEXRAD2 - level II data

Level II data are available as raw bz2 files. The filing of data is a two step process, with the raw data first written to a hidden temporary file before being renamed when the last part of the data file is received. 

NEXRAD2   ^L2-BZIP2/(....)/([0-9][0-9][0-9][0-9][0-1][0-9][0-3][0-9])([0-2][0-9][0-5][0-9])([0-9][0-9])/([0-9]*)/
        FILE    data/gempak/nexrad/craft/\1/.\1_\2_\3_\4

# Done to move file after last record is received "/E" to prevent
# autoupdate from seeing partially received files (dccraft_move is a shell script copied from $NAWIPS/bin/scripts)
NEXRAD2   ^L2-BZIP2/(....)/([0-9][0-9][0-9][0-9][0-1][0-9][0-3][0-9])([0-2][0-9][0-5][0-9])([0-9][0-9])/[0-9]*/[0-9]*/E
        EXEC    util/dccraft_move data/gempak/nexrad/craft/\1/.\1_\2_\3_\4 data/gempak/nexrad/craft/\1/\1_\2_\3

dz - Base Reflectivity (dBZ)

vr - Base Velocity (m/s)

sw - Spectrum Width (m/s)

RHI Base Reflectivity (dBZ)

NEXRAD3 - level III products

Level 3 products are available on the NEXRAD3 data feed. For all products at all WSR-88D locations nationwide, use the following pattern action: 

NEXRAD	^SDUS[23578]. .... ([0-3][0-9])([0-2][0-9])([0-6][0-9]).*/p(...)(...)
	FILE	-overwrite	-close	data/gempak/nexrad/NIDS/\5/\4/\4_(\1:yyyy)(\1:mm)\1_\2\3

To get all tilt 0 for all sites: 

NEXRAD	^SDUS[23578]. .... ([0-3][0-9])([0-2][0-9])([0-6][0-9]).*/p(N0.)(...)
	FILE	-close	data/gempak/nexrad/NIDS/\5/\4/\4_(\1:yyyy)(\1:mm)\1_\2\3

For a single product (N1P): 

NEXRAD	^SDUS[23578]. .... ([0-3][0-9])([0-2][0-9])([0-6][0-9]).*/p(N1P)(...)
	FILE	-close	data/gempak/nexrad/NIDS/\5/\4/\4_(\1:yyyy)(\1:mm)\1_\2\3

For all products from a single station (FTG): 

NEXRAD	^SDUS[23578]. .... ([0-3][0-9])([0-2][0-9])([0-6][0-9]).*/p(...)(FTG)
	FILE	-close	data/gempak/nexrad/NIDS/\5/\4/\4_(\1:yyyy)(\1:mm)\1_\2\3

Display Examples

  • DAA, ONE HOUR PRECIPITATION (DUAL POL.) (256 LEVEL / 230 KM), 170
  • DHR, DIGITAL HYBRID REFLECTIVITY, 32
  • DOD, ONE HOUR PRECIP. DIFFERENCE (DUAL POL.) (256 LEVEL / 230 KM), 174
  • DSD, STORM TOTAL PRECIP. DIFFERENCE (DUAL POL.) (256 LEVEL / 230 KM), 175
  • DSP, STORM TOTAL PRECIPITATION (PPS) (256 LEVEL / 230 KM), 138
  • DTA, STORM TOTAL PRECIPITATION (DUAL POL.) (256 LEVEL / 230 KM), 172
  • DVL, DIGITAL VERTICAL INTEGRATED LIQUID (230 KM), 134
  • EET, ENHANCED ECHO TOPS (230 KM), 135
  • HHC, HYBRID HYDROMETEOR CLASSIFICATION (16 LEVEL / 230 KM), 177
  • N0C, CORRELATION COEFFICIENT (256 LEVEL / 300 KM) (~ 0.5 DEG), 161
  • N1C, CORRELATION COEFFICIENT (256 LEVEL / 300 KM) (~ 1.5 DEG), 161
  • N2C, CORRELATION COEFFICIENT (256 LEVEL / 300 KM) (~ 2.4 DEG), 161
  • N3C, CORRELATION COEFFICIENT (256 LEVEL / 300 KM) (~ 3.4 DEG), 161
  • N0H, HYDROMETEOR CLASSIFICATION (16 LEVEL / 300 KM) (~ 0.5 DEG), 165
  • N1H, HYDROMETEOR CLASSIFICATION (16 LEVEL / 300 KM) (~ 1.5 DEG), 165
  • N2H, HYDROMETEOR CLASSIFICATION (16 LEVEL / 300 KM) (~ 2.4 DEG), 165
  • N3H, HYDROMETEOR CLASSIFICATION (16 LEVEL / 300 KM) (~ 3.4 DEG), 165
  • N0K, SPECIFIC DIFFERENTIAL PHASE (256 LEVEL / 300 KM) (~ 0.5 DEG), 163
  • N1K, SPECIFIC DIFFERENTIAL PHASE (256 LEVEL / 300 KM) (~ 1.5 DEG), 163
  • N2K, SPECIFIC DIFFERENTIAL PHASE (256 LEVEL / 300 KM) (~ 2.4 DEG), 163
  • N3K, SPECIFIC DIFFERENTIAL PHASE (256 LEVEL / 300 KM) (~ 3.4 DEG), 163
  • N0Q, LONG RANGE BASE REFLECTIVITY (256 LEVEL / 460 KM) (~ 0.5 DEG), 94
  • N1Q, LONG RANGE BASE REFLECTIVITY (256 LEVEL / 460 KM) (~ 1.5 DEG), 94
  • N2Q, LONG RANGE BASE REFLECTIVITY (256 LEVEL / 460 KM) (~ 2.4 DEG), 94
  • N3Q, LONG RANGE BASE REFLECTIVITY (256 LEVEL / 460 KM) (~ 3.4 DEG), 94
  • N0R, SHORT RANGE BASE REFLECTIVITY (16 LEVEL / 230 KM) (~ 0.5 DEG), 19
  • N0S, STORM RELATIVE VELOCITY (16 LEVEL / 230 KM) (~ 0.5 DEG), 56
  • N1S, STORM RELATIVE VELOCITY (16 LEVEL / 230 KM) (~ 1.5 DEG), 56
  • N2S, STORM RELATIVE VELOCITY (16 LEVEL / 230 KM) (~ 2.4 DEG), 56
  • N3S, STORM RELATIVE VELOCITY (16 LEVEL / 230 KM) (~ 3.4 DEG), 56
  • N0U, BASE VELOCITY (256 LEVEL / 230 KM) (~ 0.5 DEG), 99
  • N1U, BASE VELOCITY (256 LEVEL / 230 KM) (~ 1.5 DEG), 99
  • N2U, BASE VELOCITY (256 LEVEL / 230 KM) (~ 2.4 DEG), 99
  • N3U, BASE VELOCITY (256 LEVEL / 230 KM) (~ 3.4 DEG), 99
  • N0V, BASE VELOCITY (16 LEVEL / 230 KM) (~ 0.5 DEG), 27
  • N0X, DIFFERENTIAL REFLECTIVITY (256 LEVEL / 300 KM) (~ 0.5 DEG), 159
  • N1X, DIFFERENTIAL REFLECTIVITY (256 LEVEL / 300 KM) (~ 1.5 DEG), 159
  • N2X, DIFFERENTIAL REFLECTIVITY (256 LEVEL / 300 KM) (~ 2.4 DEG), 159
  • N3X, DIFFERENTIAL REFLECTIVITY (256 LEVEL / 300 KM) (~ 3.4 DEG), 159
  • N0Z, LONG RANGE BASE REFLECTIVITY (460 KM), 20
  • N1P, ONE HOUR PRECIPITATION (PPS) (16 LEVEL / 230 KM), 78
  • NCR, SHORT RANGE COMPOSITE REFLECTIVITY (230 KM), 37
  • NET, ECHO TOPS (230 KM), 41