O & M of PS22 Japan s Primary Seismic Station

Transcription

1 T5-O20 O & M of PS22 Japan s Primary Seismic Station Soshi Iwata soshi@jwa.or.jp Station Operator of PS22 J A PA N W E AT H E R A S S O C I AT I O N Vienna, 7th October, TH WORKSHOP ON OPERATION AND MAINTENANCE OF THE IMS 1

2 Japan Weather Association operates 7 IMS waveform stations. PS22 Primary seismic station x1 Auxiliary seismic stations x5 Infrasound station x1 2

3 Nagano Branch office Nagano Tokyo CRF MJB9, MJB9B 5km MJB8 MJB7 MJB1 MJA2 repeater MJB2 MJA1 MJA0 MJA2 MJA4 MJA3 MJB3 MJB5 MJB6 MJB4 100km PS22: 14 x array elements 1 x central element Matsushiro, nagano LAT. 36.5N, LON E Altitude: 406m m TEMP. : -25C - +35C 3

4 Nagano 4

5 Location Design O&M Sensor Replacement Conclusion Independent Sub-Network topology MJB2 MJA1 MJA0 MJB3 MJB4 MJB5 MJA4 MJA3 MJB6 MJB7 MJB1 CRF Vienna MJB8 To Tokyo Nagano VSAT Tokyo 5

6 Location Design O&M Sensor Replacement Conclusion MJA2 Wireless LAN MJA2 repeater MJA2 repeater CRF Vienna To Tokyo Nagano VSAT Tokyo 6

7 Location Design O&M Sensor Replacement Conclusion MJB9 MJB9B CRF To Tokyo MJB9, MJB9B Analogue telephone line CRF Vienna Nagano VSAT Tokyo 7

8 Location Design O&M Sensor Replacement Conclusion MJB2 MJA2 MJA1 MJA0 MJB3 MJA4 MJB4 MJB5 MJA3 MJB6 MJB7 MJB1 MJA2 repeater CRF MJB9, MJB9B MJB8 Co-located site with JMA (Japan Meteorological Agency) 8

9 Borehole Pure IMS site (MJA1, A3, A4, B4, B5, B8) CMG-3V (42-45m deep) 9

10 Borehole Co-located site with JMA (MJA0, A2, B1, B2, B3, B7) IMS sensor (30-42m deep) JMA sensor 10

11 Co-located site with JMA (MJB9, B9B) MJB9B: Streckeisen STS-2 MJB9: Guralp CMG-3V Matsushiro Seismological Observatory, JMA 400m deep in the tunnel 11

12 CRF (Central Recording Facility) Entrance of tunnel (go to MJB9, B9B) 12

13 Lightning Protection PS22 Lightning Strikes 12:00-18:00, 27-July-2008 Tokyo 13

14 Lightning Protection SPD for GPS cable SPD for telephone line SPD for power line 14

15 Troubleshooting DATA AVAILABILITY: 98.1% (JAN-SEP, 2015) Level 1 Trouble Data outage Way of ensuring high DA Way of troubleshooting Check waveform & SOH by eye Check log-watch alert by Reboot a data-sending program if needed Noisy waveform No data Abnormal waveform No data 15

16 Troubleshooting Level 1 Trouble Data outage Way of ensuring high DA Way of troubleshooting Check waveform & SOH by eye Check log-watch alert by Reboot a data-sending program if needed Level 2 Telephone Line failure Line test by Telephone Company remotely 16

17 Troubleshooting Level 1 Trouble Data outage Way of ensuring high DA Way of troubleshooting Check waveform & SOH by eye Check log-watch alert by Reboot a data-sending program if needed Level 2 Telephone Line failure Line test by Telephone Company remotely Level 3 Equipment hang-up Equipment reboot by LO on site Equipment replacement by LO if needed Line test by Telephone Company on site if needed 17

18 Level 1 Trouble Data outage Normal digitizer removed temporarily Way of ensuring high DA Way of troubleshooting Check waveform & SOH by eye Check log-watch alert by Reboot a data-sending program if needed Level 2 Telephone Line failure Line test by Telephone Company remotely Level 3 Level 4 Equipment hang-up Equipment failure Troubleshooting Equipment reboot by LO on site Equipment Maybe faulty replacement digitizer by LO if needed Line test by Telephone Company on site if needed Investigation by SO on site Equipment replacement if needed Line replacement by Telephone Company 18

19 Troubleshooting Level 1 Trouble Data outage Way of ensuring high DA Way of troubleshooting Check waveform & SOH by eye Check log-watch alert by Reboot a data-sending program if needed Level 2 Telephone Line failure Line test by Telephone Company remotely Level 3 Level 4 Equipment hang-up Equipment failure Equipment reboot by LO on site Equipment replacement by LO if needed Line test by Telephone Company on site if needed Investigation by SO on site Equipment replacement if needed Line replacement by Telephone Company Level 5 Sensor damage Sensor replacement by USM fund 19

20 Accessibility in winter Difficulties Bee attack in summer Flash flood in summer Bear encounter in autumn 20

21 21

22 Set up a tripod above the borehole 22

23 Set up a tripod above the borehole Wind the cable onto the winch 23

24 Set up a tripod above the borehole Wind the cable onto the winch Lock the sensor mass 24

25 Set up a tripod above the borehole Wind the cable onto the winch Lock the sensor mass Retract the three-jaw hole lock 3-Jaw Hole lock 25

26 Set up a tripod above the borehole Wind the cable onto the winch Lock the sensor mass Retract the three-jaw hole lock Open the borehole lid & wind the cable 26

27 Set up a tripod above the borehole Wind the cable onto the winch Lock the sensor mass Retract the three-jaw hole lock Open the borehole lid & wind the cable Keep winding Load-bearing cable 27

28 Set up a tripod above the borehole Wind the cable onto the winch Lock the sensor mass Retract the three-jaw hole lock Open the borehole lid & wind the cable Keep winding Strain relief mechanism comes out 28

29 Sensor Set up a tripod above the borehole Wind the cable onto the winch Lock the sensor mass Retract the three-jaw hole lock Open the borehole lid & wind the cable Keep winding Strain relief mechanism comes out Then the sensor comes out Three-jaw hole lock 29

30 Set up a tripod above the borehole Wind the cable onto the winch Lock the sensor mass Retract the three-jaw hole lock Open the borehole lid & wind the cable Keep winding Strain relief mechanism comes out Then the sensor comes out Wash the sensor 30

31 Set up a tripod above the borehole Wind the cable onto the winch Lock the sensor mass Retract the three-jaw hole lock Open the borehole lid & wind the cable Keep winding Strain relief mechanism comes out Then the sensor comes out Wash the sensor Remove the sensor cable 31

32 Set up a tripod above the borehole Wind the cable onto the winch Lock the sensor mass Retract the three-jaw hole lock Open the borehole lid & wind the cable Keep winding Strain relief mechanism comes out Then the sensor comes out Wash the sensor Remove the sensor cable Separate the three-jaw hole lock 32

33 New sensor 3-jaw hole lock Sensor cable Set up a tripod above the borehole Wind the cable onto the winch Lock the sensor mass Retract the three-jaw hole lock Open the borehole lid & wind the cable Keep winding Strain relief mechanism comes out Then the sensor comes out Wash the sensor Remove the sensor cable Separate the three-jaw hole lock Connect the sensor cable & the threejaw hole lock to a new sensor New sensor 33

34 Set up a tripod above the borehole Wind the cable onto the winch Lock the sensor mass Retract the three-jaw hole lock Open the borehole lid & wind the cable Keep winding Strain relief mechanism comes out Then the sensor comes out Wash the sensor Remove the sensor cable Separate the three-jaw hole lock Connect the sensor cable & the threejaw hole lock to a new sensor Down the new sensor 34

35 Set up a tripod above the borehole Wind the cable onto the winch Lock the sensor mass Retract the three-jaw hole lock Open the borehole lid & wind the cable Keep winding Strain relief mechanism comes out Then the sensor comes out Wash the sensor Remove the sensor cable Separate the three-jaw hole lock Connect the sensor cable & the threejaw hole lock to a new sensor Down the new sensor Finish re-installation 35

36 Set up a tripod above the borehole Wind the cable onto the winch Lock the sensor mass Retract the three-jaw hole lock Open the borehole lid & wind the cable Keep winding Strain relief mechanism comes out Then the sensor comes out Wash the sensor Remove the sensor cable Separate the three-jaw hole lock Connect the sensor cable & the threejaw hole lock to a new sensor Down the new sensor Finish re-installation Extract jaw, unlock mass, calibration 36

37 Original manual for sensor replacement 37

38 PS22, Japan s Primary Seismic Station 14 array sites (8 are co-located at JMA sites) DA: 98.1% (Jan-Sep, 2015) Main cause of data interruption: Communication line failure Equipment hang-up Equipment failure Sensor damage Difficulty: To identify the damaged equipment (e.g. no status lamp with Nano digitizer) To install/remove sensor at the co-located site To access some sites in winter Short of spare (currently no spare digitizer) 38

39 Thank you very much for your kind attention 39