Doppler Weather Radar - METNET - India Meteorological Department

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ANNEXURE 1 ABBREVIATIONS USED PRF : Pulse Repetition Frequency PRT : Pulse Repetition Time IF : Intermediate Frequency RF : Radio Frequency I : In-phase Q : Quadrature FT : Fast Transform FFT : Fast Fourier Transform DSP : Digital Signal Processor V : Velocity Z : Reflectivity W : Spectral Width IFD : Intermediate Frequency Digitizer RX : Receiver TX : Transmitter W/G : Waveguide LNA : Low Noise Amplifier D : Diameter of Particle dB : Decibel dBm : Decibel milli watt dBZ : Logarithmic Scale for Measuring Radar Reflectivity Factor V : Antenna Speed Hz : Hertz KHz : Kilohertz MHz : Megahertz GHz : Gigahertz LOG : Logarithmic LIN : Linear IIR : Infinite Impulse Response PE : Photo-Electron CPU : Central Processing Unit AC : Alternating Current DC : Direct Current Rmax : Maximum Unambiguous Range Vr : Radial Velocity STALO : Stable Local Oscillator COHO : Coherent Oscillator 94
ACKNOWLEDGEMENTS Several experts have been instrumental in allowing this project to be completed. We would like to express our deepest thanks especially to AVM (Dr.) AJIT TYAGI, Director General of Meteorology, India Meteorological Department, New Delhi, for his encouragement and patience throughout the duration of this project. We express our thanks to SH S.K.KUNDU, DDGM (UI), New Delhi for extending his moral support in fulfilling the given project. Our deep sense of gratitude to Dr. O.P.SINGH, DDGM, R.M.C. New Delhi, for his support & encouragement. We would also thank our colleagues S/Shri R. P. Singh A.M.II, Anoop Kandari S.A. & K. K. Sharma S.A. of Doppler Weather Radar, Palam, New Delhi without whom this project would have been a distant reality. More suggestions are welcome for improvement on the DWR Palam E-mail ID dwrpalam@gmail.com from meteorological experts who go through this Standard Operating Procedure Manual, 2011. 95
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Ministry of Earth Sciences INDIA ME
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Preface Introduction Definitions Pu
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3.8 To copy RAW DATA 35 3.9 Procedu
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B.3.3 Velocity Products 69 B.3.4 Hy
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PREFACE India Meteorological Depart
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DEFINITION An important aspect of a
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MONITORING OF DWR SYSTEM CHAPTER 1
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Before controlling radar operations
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5. Power Cabinet: “SERVO POWER AM
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9. Checking real time displays:-The
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2. In Modem, PMA always shows off w
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This can be done by “telnet” co
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drwxr-xr-x 3 501 500 4096 Aug 10 02
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Figure 1.8 Connecting to MAIN serve
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Thus now the tasks are configured a
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STEP 1 : Invoke “iris” though t
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STEP 6 : Skip time : This is the ti
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3. Edit the Product as needed , the
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(ii) SC. (E) In-Charge Radar Lab, D
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Station and print-out (except Daily
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2.2.5. A-log book Details of all ad
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Table 2.8 VPN connectivity status S
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Step-II. connected Copy image files
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3.7. To search for a file [operator
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PCO name: IMD-B, TCO name: IMD-B PR
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# Filename: transmet_gif # Sends fi
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9. To liaise with other DWR station
Page 55 and 56: • Detection of deterioration caus
Page 57 and 58: ack-mounted modules which do not re
Page 59 and 60: Screenshot 2 : Calibration Control
Page 61 and 62: Antenna Waveguide Switch, Circulato
Page 63 and 64: 4.3.3 Bitex data point configuratio
Page 65 and 66: APPENDIX A AN OVERVIEW OF DOPPLER W
Page 67 and 68: A.1.1. Future IMD Radar Network pla
Page 69 and 70: IRIS/Display Installed at remote wo
Page 71 and 72: APPENDIX B WSR 98D/S DWR SYSTEM CHA
Page 73 and 74: e. Elevation limits -- Upper and lo
Page 75 and 76: B.1.9. Calibrations and health moni
Page 77 and 78: B.2.6. Unambiguous range a. Reflect
Page 79 and 80: The System is capable of generating
Page 81 and 82: 1. System generates hail, thunderst
Page 83 and 84: 1.5. There is provision of DVD Writ
Page 85 and 86: 6. Wait for ten minutes. Calibrate
Page 87 and 88: SA9-15 Current at position 15 of A1
Page 89 and 90: Test procedure (1) Type the “zaut
Page 91 and 92: 4. Observe that the PFN voltage goe
Page 93 and 94: Table D.1. PPI and RHI scanning typ
Page 95 and 96: According to the need of IMD, purpo
Page 97 and 98: Chennai@8min, Machilipatnam, Vishak
Page 99 and 100: D.2.5. Scan strategies being follow
Page 101 and 102: High Voltage (Power On) Avoid conta
Page 103 and 104: Average power densities less than 5
Page 105: E.3. Antenna/Pedestal Safety WARNIN
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