Doppler Weather Radar - METNET - India Meteorological Department

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Radiation Hazard DO NOT BYPASS INTERLOCKS Microwave (electromagnetic) radiation exists during the operation of the WSR-98D/S. During all operational modes, the antenna is scanned continuously. Consequently, the ANSI-designated power density safety level of 5 mW/cm2 is not exceeded anywhere. However, if the scanning is stopped for any reason with the transmitter energized, this level may be exceeded within a cylindrical volume 12.2 meters in diameter and 183 meters long in front of the antenna reflector, as indicated by the illustration at the end of this safety summary. Maintenance personnel must not enter this zone when this condition exists, nor should the antenna be pointed in a direction where there are any people within this zone. Refer to Figure SS-1. Major Equipment Damage Mismatching electrical connectors on the RDA can cause major equipment damage. Therefore, ensure that the connector keys/color coding is followed when reconnecting connectors during maintenance. Loss of oil (lubricant) or glycol (coolant) from the generator engine could result in equipment damage. When performing maintenance, inspect for leaks and tighten fittings as needed. An automatic over temperature shut-off switch is used to prevent damage. Removal of Tools Remove all tools and dropped hardware such as locknuts, washers, screws, etc., from equipment prior to restoring power to any WSR-98D/S equipment. Hoist Safety Before operating the hoist, the operator must be familiar with all operating controls of the hoist, and must be instructed as to warnings on the hoist and the safe hoisting practices listed in the operator's portion of the manual provided by the hoist manufacturer. 92
E.3. Antenna/Pedestal Safety WARNING Do not attempt to climb or service the pedestal assembly while the antenna is rotating and/or while the antenna servos are operating. Severe injury from moving elements may result unless all maintenance instructions and safety procedures are followed. The antenna/pedestal is provided with safety features and procedures to protect maintenance personnel from hazards associated with moving masses, dangerous heights, and awkward equipment access/handling positions. The safety features provided on the antenna/pedestal assembly include the following: Safety interlock switch • Grab bars • Non-skid surface(s) • Ladder hooks • Stow pins NOTE The Radome hatch is equipped with safety interlocks. When the hatch (interlock) is opened, servo power is removed from the Antenna Pedestal and the Transmitter high-power RF output is switched into the dummy load. To ensure personnel safety, the following precautions must always be observed: 1. Turn off pedestal power at the RDA Data Processor Maintenance Panel. 2. Place SAFETY WARNING tags on the pedestal electronic ON/OFF switch on the maintenance panel. 3. Ensure the transmitter is in STANDBY. 4. Place the pedestal "Safe/Operate" switch to OFF. 5. Engage azimuth and elevation stow pins. 6. Use the riser ladder properly secured with quick-release pins when climbing the pedestal to work inside the azimuth portion of the pedestal. 7. Always use grab bars when climbing the antenna pedestal. 8. Use the appropriate ladder hooks for the ladder for each work area on the antenna pedestal. 93
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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
Page 53 and 54: 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: Average power densities less than 5
Page 107 and 108: ACKNOWLEDGEMENTS Several experts ha
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