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Principals of Radar

Principals of Radar. F-11-4-4. 28 foot dish Pulse Width 0.95 ° Peak Power 750kW Avg. Power 1.5kW Discrete Pulse Transmissions Pulse length: 1.5 µ sec.; or about 250 meters(0.13 nm). Pulse volume is 250 meters by 1 degree in azimuth. Radar Range: Reflectivity = 248 nm Velocity = 124 nm

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Principals of Radar

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  1. Principals of Radar

  2. F-11-4-4

  3. 28 foot dish Pulse Width 0.95° Peak Power 750kW Avg. Power 1.5kW Discrete Pulse Transmissions Pulse length: 1.5 µsec.; or about 250 meters(0.13 nm). Pulse volume is 250 meters by 1 degree in azimuth. Radar Range: Reflectivity = 248 nm Velocity = 124 nm Volume Coverage Patterns (Clear Air vs. Precipitation Mode) 10 minutes vs 5 minutes Doppler and Surveillance Channels 3 Base Data Products Reflectivity Velocity Spectrum Width NWS Radar Characteristics

  4. RADAR PRODUCT GENERATOR (RPG) RADAR DATA ACQUISITION UNIT (RDA) F-11-4-5

  5. BACKSCATTERED ENERGY TRANSMITTED PULSE RADAR TARGET RADAR TARGET BACKSCATTERED ENERGY RADAR TARGET F-11-4-14

  6. REFLECTIVITY LARGER PARTICLES - HIGHER REFLECTIVITY SMALLER PARTICLES - LOWER REFLECTIVITY F-11-4-37

  7. WSR-88D DBZ RANGES (I.E., REFLECTIVITY) PRECIPITATION INTENSITY 15 TO 29 LIGHT 30 TO 39 MODERATE 40 TO 44 HEAVY 45 TO 49 VERY HEAVY 50 TO 54 INTENSE 55 AND ABOVE EXTREME F-11-4-38

  8. VOLUME COVERAGE PATTERN F-11-4-49

  9. VOLUME COVERAGE PATTERN (VCP) 11 19.5 16.7 14.5 12.0 10.0 8.7 7.5 6.2 5.3 70 4.3 60 50 3.4 40 2.4 HEIGHT (K FT) 30 1.5 20 0.5 10 0 20 40 60 80 120 100 HORIZONTAL RANGE (NM) F-11-4-50

  10. VOLUME COVERAGE PATTERN (VCP) 21 14.5 19.5 9.0 6.0 70 4.3 60 50 3.4 40 2.4 HEIGHT (K FT) 30 1.5 20 0.5 10 0 20 40 60 80 100 120 HORIZONTAL RANGE (NM) F-11-4-51

  11. F-11-4-52

  12. VOLUME COVERAGE PATTERN (VCP) 31 AND 32 70 4.5 60 3.5 50 40 2.5 HEIGHT (K FT) 30 1.5 20 0.5 10 0 40 60 20 80 100 120 HORIZONTAL RANGE (NM) F-11-4-53

  13. F-11-4-54

  14. CREATING COMPOSITE REFLECTIVITY F-11-4-61

  15. COMPOSITE REFLECTIVITY 30 50 40 15 THE DISPLAYED VALUE ON THE COMPOSITE REFLECTIVITY IMAGE IS: 50 F-11-4-62

  16. F-11-4-67

  17. CONE OF SILENCE 19.5º 19.5° F-11-4-70

  18. CONE OF SILENCE 19.5 16.7 14.5 12.0 10.0 8.7 7.5 6.2 5.3 70 4.3 60 50 3.4 40 2.4 HEIGHT (K FT) 30 1.5 20 0.5 10 0 20 40 60 80 120 100 HORIZONTAL RANGE (NM) F-11-4-71

  19. Cone Of Silence F-11-4-72

  20. F-11-4-73

  21. ECHO TOP INDICATED ON PRODUCT ECHO ECHO TOP PRODUCT “STAIR-STEPPED” APPEARANCE F-11-4-79

  22. MAX K FT: 39 F-11-4-87

  23. F-11-4-88

  24. F-11-4-92

  25. FREEZING LEVEL HIGH REFLECTIVITY BAND FORMATION OF BRIGHT BAND 0ºC F-11-4-97

  26. 50NM 50NM 25NM 25NM BASE REFLECTIVITY - 0.5 DEGREES BASE REFLECTIVITY - 1.5 DEGREES 50NM 50NM 25NM 25NM BASE REFLECTIVITY - 2.4 DEGREES BASE REFLECTIVITY - 3.4 DEGREES F-11-4-98

  27. BRIGHT BAND AND ELEVATION ANGLE 3.5° 2.4° FREEZING LEVEL 0ºC HIGH REFLECTIVITY BAND 1.5° 0.5° F-11-4-99

  28. FINE LINE F-11-4-100

  29. GROUND CLUTTER F-11-4-101

  30. ANOMALOUS PROPAGATION (AP) F-11-4-102

  31. HIGH REFLECTIVITY VALUES F-11-4-103

  32. LOW ECHO TOPS F-11-4-104

  33. F-11-4-184

  34. F-11-4-185

  35. F-11-4-187

  36. BASE REFLECTIVITY 0.5 DEGREES DECEMBER 28TH, 1998 F-11-4-199

  37. The End Questions???

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