rams evaluation and visualization utilities (revu) post processing
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RAMS Evaluation and Visualization Utilities (REVU)
Post Processing
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Types of Post-Processing for NWP Results
• Visualization
• Evaluation / Verification
• Products for distribution
• Input to other application software
• Dispersion and photochemical models
• Scientific applications: hydrology, ocean, etc.
• Business applications: load forecasting, insurance, etc.
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RAMS Post-processing
REVU - RAMS Evaluation and Visualization Utilities
• Visualization
• NCAR Graphics
• iVAN (interactive Visualization and Analysis package)
• GrADS
• Vis5D
• Verification - statistics and graphics
• Reformatting for other applications
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RAMS/REVU Visualization
• NCAR Graphics
• 2-dimensional graphics
• Horizontal and vertical cross-sections of numerous basic and derived variables
• Line, filled, and tile contours
• Wind vectors and streamlines
• Batch processing to produce plots
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RAMS/REVU Visualization
iVAN - Interactive Visualization and ANanlysis
• Graphical User Interface (GUI) to NCAR Graphics
• Interactively produce and view graphics
• Mouse actions to zoom, select variables, grids, cross-sections
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RAMS Visualization - iVAN
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RAMS/REVU VisualizationGrADS
• Distributed by COLA (near Washington, DC)
• 2-dimensional graphics
• Command line interface, not very good GUI
• Linux, Windows, Unix support
• Has RAMS projection, but it doesn’t work
• No terrain-following coordinates
• Horizontal and vertical interpolation necessary
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RAMS/REVU VisualizationVis5D
• Distributed by University of Wisconsin-Madison
• 3-dimensional graphics
• Not very good GUI (my opinion!)
• Executables and source; Linux, Windows, Unix support
• Has RAMS projection, but it doesn’t work
• No terrain-following coordinates
• Horizontal and vertical interpolation necessary
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RAMS/REVU Visualization
Numerous other commercial packages
• AVS
• PV-Wave
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RAMS/REVU Verification• Produces statistics and graphics comparing forecast results
with observations
• Numerous statistics at surface, sigma-z, pressure, or Cartesian levels
• Graphics include numeric difference plots, wind barb comparison, time series (NCAR Graphics)
• Uses “data grabber”, 4-dimensional interpolation to specific location
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RAMS/REVU Output processingReformatting for other applications
• Basic and derived variables
• Subsets, gridded or profiles
• Code must be modified
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REVU 2.3.1(and 2.5)
• Started life as an AVS module• Grew into a monster!!!!• Tried to do everything in a single code, even
marginally related things like statistics• Plotting option settings in namelist became
cryptic• Code virtually impossible to maintain…• …and we still want to add more features!
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The New REVU Suite
• Split REVU into several different executables which share common code:– REVU-pl – plotting– REVU-gr – grabbing– REVU-rf – reformat– REVU-st – statistics
• Some versions will be available for RAMS v6.0 by the end of the year
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REVU_IN – SPACE
$CONTROL
ANPREF='anal/a-A', ! Prefix for the file names
REVPREF='./', ! Prefix for output file names
ANATYPE='SPACE', ! Type of run
HEAD1='NY Test Run', ! Header line
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REVU_IN – SPACE (cont.)
IGRID(1)=1, ! Grid(s)
IZTRAN(1)=1, ! If horizontal slab
! 1= terrain-following surface
! 2= interpolate to Cartesian surface
! 3= interpolate to pressure surface
IPLEVEL(1)=700, ! If pressure surface, pressure level in mb
! Level must be one of the mandatory levels:
! 1000,925,850,700,500,400,300,250,200,150,100
MAPFILL=3, ! Map background
IBACKGND=1, ! Background color
IPLTINFO=1, ! Information table
IPANEL=1, ! Plots per panel
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REVU_IN – SPACE (cont.)
! Landmarks
LANDMARK(1)='/M1:b.03:t2:s1.:xgray/L1:s.01:xgray/',
! Re-map colors
COLORS(1)='/axis:lightgray/title0:rgb:.8:.8:.8/',
! Frame specification
TVAR(1)='/F/1:9:1/', ! time
ZVAR(1)='/F/2:2:1/', ! z coord
YVAR(1)='/V/0:0:1/', ! y coord
XVAR(1)='/H/0:0:1/', ! x coord
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REVU_IN – SPACE (cont.)
! Parameters
CFRAME_A(1)='/tempc/fb/10./30./1./m5:c20.:xgray/red/blue/',
CFRAME_B(1)='/b/1/1/3/darkgreen/',
CFRAME_C(1)='/tke/fb/.7/1./.05/m6:xgray/darkgreen/midgreen/',
CFRAME_A(2)='/relhum/fb/50./100./5./m2:xblue/lightblue/',
CFRAME_C(2)='/precip/fb/1./8./1./m2:c0.:xdarkgreen/green/',
CFRAME_A(3)='/precip/fb/1./8./1./m6:c0.:xorange/yellow/midgreen/',
CFRAME_A(4)='/dewptc/fb/10./30./1./m5:c20.:xgray/red/blue/',
CFRAME_B(4)='/v/1/1/1/yellow/2./',
CFRAME_C(4)='/speed/vb/0./8./1./m6:c5./yellow/darkgreen/',
$END
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REVU_IN – V5D (GrADS)
$CONTROL
ANPREF='anal/a-A', ! Input filename prefix
REVPREF='./', ! Output filename prefix
ANATYPE='V5D', ! Type of run (GRADS)
IGRID(1)=0, ! Grid(s)
IZTRAN(1)=3, ! If horizontal slab
! 1= terrain-following surface
! 2= interpolate to Cartesian surface
! 3= interpolate to pressure surface
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REVU_IN – V5D (cont.)
! Frame specification
TVAR(1)='/F/1:9:1/', ! time
ZVAR(1)='/F/0:0:1/', ! z coord
YVAR(1)='/V/0:0:1/', ! y coord
XVAR(1)='/H/0:0:1/', ! x coord
! Parameters
CFRAME_A(1)='/u/',
CFRAME_A(2)='/v/',
CFRAME_A(3)='/w/',
CFRAME_A(4)='/tempk/',
CFRAME_A(5)='/dewptk/',
$END
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REVU_IN – V5D (cont.)
$GLL
IGRIDLL=1, ! Lat-long grid specification
! 0= specified below
! 1= fits within RAMS grid
! 2= contains the full RAMS
GLLDLLAT=1., ! latitude grid point spacing
GLLDLLON=1., ! longitude grid point spacing
GLLWLON=-66., ! western edge of grid
GLLELON=-37., ! eastern edge of grid
GLLSLAT=-37., ! southern edge of grid
GLLNLAT=-15., ! northern edge of grid
$END