Doppler Weather Radar - METNET - India Meteorological Department

More documents

Recommendations

Info

B.3.3. Velocity products The system generates and display following velocity products: i. Radial velocity versus the azimuth for a fixed elevation and a fixed slant range (VAD). ii. iii. iv. Radial velocity at a fixed user defined range on height and azimuth angles (Radial velocity display for fixed range, azimuth angles for various height and azimuth. Horizontal wind velocity and wind direction using barbs in a vertical column above the radar site for different heights including divergence & convergence product. Horizontal wind vectors (UWT) using barbs at user defined layer height with or without underlay of reflectivity or velocity in PPI / CAPPI format. B.3.4. Hydrological products The DWR system generates and display following hydrological products: i. Rainfall intensity using Z-R relationship in a user selectable surface layer with constant height above ground Instantaneous estimation of Vertically Integrated Liquid water content (VIL) residing in a user defined atmosphere layer in the atmosphere to be displayed in PPI type of display. ii. iii. iv. Rainfall intensity histogram at selectable locations within radar coverage during a user defined time period (this facility is not configured in the M/s Metstar DWRs). Precipitation accumulation (PAC) in a user definable time period. Rainfall amount in user defined basins for user defined time span (this facility is not configured in the M/s Metstar DWRs). v. Rainfall amount for any user defined period in the past (past number of hours) prior to product generation. B.3.5. Aviation products i. The system has evaluate derivatives of wind velocity in radial, azimuth, elevation, North South, East West directions and derive horizontal, vertical and three dimensional shears. ii. iii. The system is also able to generate warning product on microburst. The system is evaluate maximum turbulence within user defined atmospheric layer and display in top view. B.3.6. Warning and forecasting products for tropical regions 68
1. System generates hail, thunderstorm and dust storm warning symbols at the places likely to get affected by hailstorm, thunderstorm, and dust storm using reliable warning algorithms. 2. System is having capabilities of evaluating speed and direction of movement of weather systems (track forecasting products). 3. System is also having capabilities of warning, if any, of the conditions defined by the user are reached or fulfilled on reflectivity, velocity, VIL and wind shear. 4. System is having ability to detect tornado and gust fronts associated with storms and issue visual and text warning message. 5. The system is able to generate a storm relative velocity product e.g. PPI, PCAPPI removing the bias of storm motion velocity. 6. The system is capable of providing interactive method for locating storm centre, superimposing 5°, 10° or 15° soft spiral overlay as per operator’s choice over the reflectivity image containing spiral bands of the storm. The system is also able to measure the radius of maximum wind within user defined grid of 5 – 60 km around the storm centre. B.3.7. Alphanumeric products The system is also be able to provide data on Reflectivity (Z), Radial velocity (V) and Horizontal wind velocity, Rain rate in terms of latitude and longitude and heights at user defined height grid point up to 200 km from radar site in tabular form for ingesting these data into numerical models for weather predictions, however this facility does not configured in the M/s Metstar DWRs. B.4. Workstations and display capabilities of the system B.4.1. Workstations The WSR98-D/S system is having seven nos. of workstations, as detailed giving below to perform various tasks of data acquisition, product generation, archival, display and house keeping. Workstation is based on same hardware platform. i. Two workstations with identical features having 21″ LCD color monitor (one main and the other as hot standby) for control and operations involved in data acquisition, product generation, product display and archival. ii. iii. iv. One workstation with 21″ LCD color monitor for maintenance, calibration and house keeping tasks. One workstation with 29″ LCD color monitor for simultaneous real time display of Z, V, σ and BITE parameters One workstation with 21″ LCD color monitor for collecting products, networking and dissemination of products over internet. 69
Page 1 and 2:
Ministry of Earth Sciences INDIA ME
Page 3 and 4:
Preface Introduction Definitions Pu
Page 5 and 6:
3.8 To copy RAW DATA 35 3.9 Procedu
Page 7 and 8:
B.3.3 Velocity Products 69 B.3.4 Hy
Page 9 and 10:
PREFACE India Meteorological Depart
Page 11 and 12:
DEFINITION An important aspect of a
Page 13 and 14:
MONITORING OF DWR SYSTEM CHAPTER 1
Page 15 and 16:
Before controlling radar operations
Page 17 and 18:
5. Power Cabinet: “SERVO POWER AM
Page 19 and 20:
9. Checking real time displays:-The
Page 21 and 22:
2. In Modem, PMA always shows off w
Page 23 and 24:
This can be done by “telnet” co
Page 25 and 26:
drwxr-xr-x 3 501 500 4096 Aug 10 02
Page 27 and 28:
Figure 1.8 Connecting to MAIN serve
Page 29 and 30: Thus now the tasks are configured a
Page 31 and 32: STEP 1 : Invoke “iris” though t
Page 33 and 34: STEP 6 : Skip time : This is the ti
Page 35 and 36: 3. Edit the Product as needed , the
Page 37 and 38: (ii) SC. (E) In-Charge Radar Lab, D
Page 39 and 40: Station and print-out (except Daily
Page 41 and 42: 2.2.5. A-log book Details of all ad
Page 43 and 44: Table 2.8 VPN connectivity status S
Page 45 and 46: Step-II. connected Copy image files
Page 47 and 48: 3.7. To search for a file [operator
Page 49 and 50: PCO name: IMD-B, TCO name: IMD-B PR
Page 51 and 52: # 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: The System is capable of generating
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 and 106: E.3. Antenna/Pedestal Safety WARNIN
Page 107 and 108: ACKNOWLEDGEMENTS Several experts ha
show all

Doppler Weather Radar - METNET - India Meteorological Department

Create successful ePaper yourself

Delete template?

Save as template?