Doppler Weather Radar - METNET - India Meteorological Department

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If this IRIS_ERROR.LOG file does not contain any burst pulse missing error message, it can be concluded that the radar is radiating. By examining the vvp product also it can be concluded whether the radar is actually radiating. This is an indirect method as it is practically observed that if radiation is switched off the vvp product will not be showing the velocity barbs. Hence it can be safely concluded that radar is radiating if barbs are observed in a vvp product. There is another method, as explained in the Figure 7 to confirm about the presence of transmitter’s radiation. The “bitex” command is given in a new window of RCP8 after iris is started and connected to RCP8. A window opens when bitex command is given as shown in the following photograph. The button on the extreme right is to be clicked to get the details of transmitter's average RF power output. Figure 3.1 Checking radiation of radar Some important software commands used in dwr operation: 3.3. Checking the current directory [root@DELHI-REMOTE ~]# pwd 3.4. To copy into pen drive [root@DELHI-REMOTE ~]# cp -rf /home/operator/Desktop/Event /media 3.5. To check weather the given file was copied into pendrive [root@DELHI-REMOTE ~]# cd /media [root@DELHI-REMOTE media]# ls 3.6. To delete all files from the directory [root@DELHI-REMOTE ~]# rm –rf *.* 34
3.7. To search for a file [operator@DELHI-INTERNET ~]$ su – (enter the root password) [root@DELHI-INTERNET ~]# find / - 3.8. Copy of raw data RAW data is available in the Main & Standby servers in their /usr/iris_data/ product_ raw folder and lda (archive data) folders. This data can be copied to any local server (or in any other folder which has ample space to store the data) for use with the following procedures: Enter the following commands; [operator@DELHI-INTERNET ~]$ scp –r main:/usr/iris_data/product_raw/DLH YYMMDD*.* localserver:/usr/iris_data/weekly folder/(or any folder) Whenever any raw data is missing in main server then it may be available in the standby server. If missing data is available then it can also be copied from the standby server. The folder containing the raw data is to be zipped and saved, as the raw data is voluminous. 3.9. Procedure for archiving raw data It is mandatory that each DWR Station should copy the raw data weekly whenever the accumulated data reached the size of 4.7 GB. The data is to be compressed by zipping and then save it in one DVD of 4.7G.B at a time, as the DVD drive provided does not allow multi session. Normally, one week’s raw data occupies 8 to 9 GB and after compressing to tar.bz2 format, it occupies around 4GB. Also, monthly data is to be separately zipped and archived in hard disk at the end of each month for archival of DWR data for future use. 5 years data occupies in 1 TB hard disk. Detailed information is provided in B.5 of APPENDIX B. 3.10. Procedure for finding the size of a folder [operator@DELHI-INTERNET ~]$ df -h /usr/iris_data/product_raw/ Filesystem /dev/sda3 Size Used Avail Use% Mounted on 211G 97G 103G 49% /usr/iris_data [operator@DELHI-INTERNET ~]$ df -h /home/operator/ Filesystem Size Used Avail Use% Mounted on /dev/sda1 6.7G 2.8G 3.6G 44% / [operator@DELHI-INTERNET ~]$ df -h /home/operator/LatestImages/ Filesystem Size Used Avail Use% Mounted on 35
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: Step-II. connected Copy image files
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 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 and 106:
E.3. Antenna/Pedestal Safety WARNIN
Page 107 and 108:
ACKNOWLEDGEMENTS Several experts ha
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