document_taurus_field_check-366-3.pdf

TAURUS Field Control

(version 366-3)

2014

Sandrine Roussel, Coralie Aubert, Glenn Cougoulat, translation P. Bascou (ISTerre) Page 1 / 18

TAURUS Field Control (version 366-3)

Data saving


(version 366-3)

2014


Summary

I) PC Configuration to discuss with Taurus .............................................................................................. 3

1) Windows .......................................................................................................................................... 3

2) Linux ................................................................................................................................................ 3

II) Check of Taurus functioning ................................................................................................................ 4

1) Status page ...................................................................................................................................... 4

2) Signal check ..................................................................................................................................... 5

3) Check of store data available (EXT 3 card) ...................................................................................... 5

4) GPS check ........................................................................................................................................ 6

5) Sensor check .................................................................................................................................... 7

6) Check of store data recorded .......................................................................................................... 8

7) Check of miniseed data archiving (FAT 32 card) ............................................................................. 9

III) Data collecting .................................................................................................................................. 10

1) Flashcards saving ........................................................................................................................... 10

2) Miniseed data saving ..................................................................................................................... 11

IV) Check of miniseed data continuity................................................................................................... 11

1) Software installation ..................................................................................................................... 11

2) Using .............................................................................................................................................. 12

3) Some examples ............................................................................................................................. 13

V) Compact Flash cards formatting ....................................................................................................... 17

1) Card for store recording ............................................................................................................ 17

2) Card for miniseed data recording .............................................................................................. 17


(version 366-3)

2014


For power on a Taurus digitizer or to wake up a digitizer in sleeping mode, push briefly the central button.

You have to wait 5 minutes before the screen wakes up.

Moving in the menu is done by left and right buttons, validation by the central button.

You can also access to the digitizer by ethernet cable (blue cable with the digitizer). You have to enter the Taurus IP address 192.168.1.2 (for all the digitizers) in a web navigator. (Mozilla-Firefox recommended).

In buffered mode you need to have the screen powered to be able to dialog with the Taurus.

I) PC Configuration to discuss with Taurus

1) Windows

- Menu START / Connections / look at all connections - Connection to the local network / properties - Internet Protocol (TCP / IP) / properties - Use this IP address : 192.168.1.5 (sub network mask : 255.255.255.0) - Validate

2) Linux

- Open aterminal changethe IP address of your computer: sudo ifconfig eth0 192.168.1.5Your password will be asked to execute the command. NB: by sudo, you become a "superuser" time to launch the command. Only this super user has rights to change the IP address on linux.

- Check if the computer address is well changed : ifconfig - Check if the connection with The Taurus is well done: ping 192.168.1.2

NB: In case your computer (linux) stops everytime the link with the Taurus by changing computer IP address, you have to stop the "network manager" with this command:

su -c 'service NetworkManager stop'


(version 366-3)

2014


II) Check of Taurus functioning 1) Status page

The digitizer status page sums up the main information:

- Count of recording days remaining. - Compact flash card size used (store data) - Battery voltage - Sampling - Status

If status is green, everything is allright. If status is red, you have to click on the status link, and then click on the NOK link. It shows you the trouble. NB: If the Ethernet link is not used, le link Link will be in red, which is normal.


(version 366-3)

2014


2) Signal check

Menu: waveform.

3) Check of store data available (EXT 3 card)

Menu: data availability.


(version 366-3)

2014


If there are some interruptions, you can download the SOH data on the archive card (FAT 32), to check if there were GPS, satellite receiving problems. (see $ 7) 4) GPS check

Menu: Timing.

The important thing is to check the "PLL state status. The signals are well received when PLL state indicates "Fine Lock".


(version 366-3)

2014


5) Sensor check

Menu: Sensor.

If the CMG-3, or STS-2 masses are not anymore inside the green edges, you have to recentre them using the BBOX.


(version 366-3)

2014


6) Check of store data recorded

Menu: Data retrieval. You can download few data to check your installation. You can read it with PQL, MATLAB You can choose data format mseed, SAC, what you use to work.


(version 366-3)

2014

Sandrine Roussel, Coralie Aubert, Glenn Cougoulat, translation P. Bascou(ISTerre) Page 9 / 18

7) Check of miniseed data archiving (FAT 32 card)

Menu: Data Archive.


(version 366-3)

2014


Collect SOH data, so you can verify the GPS by number of satellites used.

III) Data collecting

For collecting data, you have to shutdown the Taurus, take away the archive card (on the left), and check continuity of these data. If there is no gap, change only the archive card. If there are gap, change the archive card + the store card. Connect the card in the media reader and copy data directly in the computer.

1) Flashcards saving


(version 366-3)

2014


Once the station is shut down, open the media door under the digitizer, check the warning light is green, before collecting cards.

2) Miniseed data saving

The new versions of Taurus (v 3.4.6 and more) record directly the data in miniseed format.

When you pick up data in the field, you can now collect only the card containing miniseed data. You have to be careful however there is no hole in the data by scanning the directory with the msi software. (see $ IV) Indeed, holes in miniseed data are not necessarily corresponding with hole in store data. If hole are identified, its better to collect recorded store data on the 2nd flash card. These missing data can be regenerated by convert the store data using ApolloProject software (see "using of Apollo Project for transform data").

IV) Check of miniseed data continuity

By using msi software, you can scan a directory containing miniseed data and list gap or overlap.

1) Software installation

Msi can be working on: - Mac OS - Linux


(version 366-3)

2014


You can download the software msi, developped by IRIS here:

https://seiscode.iris.washington.edu/projects/msi/files

For installing msi software, you only need to uncompress and unarchive the file:

tarxvzf msi-3.4.3.tar.gz

Copy the executable in the /usr/local/bin directory so you can execute it from any directory.

2) Using

1- Download the miniseed data in the computer.

The miniseed data are sort by month in directories. Example: 201210 (month 10/2012 data)

2- Execute the following command:

msi -t -G ./201210/*.miniseed This command will scan all the miniseed files of the 201210 directory.

3- Command results

The command result shows on screen: - Numberof segments of data by channel - Number of gap


(version 366-3)

2014


3) Some examples

Example 1: scan of all data for the station CT17 (msi -t -G */*)

In this previous example, there is no gap on data. 6 segments have been listed (2 by ways) 3 gaps have been listed (1 hole by way)

Normal result because : - Day 185: installation of the station - Day 251: first round for picking up data - Day 327: 2nd data round

So there is only 1 gap by way into the data the day 251, due to the data collect (station shutdown).

Number of

segments

Number of

gap

Gap in

seconds


(version 366-3)

2014


Example 2:

Is the previous example, some gaps have been detected.

16 segments have been listed 13 gaps have been listed

- Day 186: installation of the station - Day 256: first round for picking up data - Day 324: 2nd data round

There are gpas inside data, in particular: - day 306 -> 1.22s (ways E, N et Z) - day 318 ->3071s (ways E, N et Z) - day 318 -> 2.64s (ways E, N et Z)

Remark: you need to know the station history for a good using of the msi command (date of installation, dates of last rounds...).


(version 366-3)

2014


You have now checked the miniseed data:

a) There is no gap, change only the archive card (FAT 32), replace it at the left of the Taurus. Dont forget to erase the store data. Select the menu "store tools" then "delete store" then "destroy and recreate".

b) There are gap, change the archive card (FAT 32) + store card (EXT 3)

Handle with care the adapter, its very fragile

Attention to the format card !

If the digitizer doesnt recognized the store card, ( No Data Available at the signal location on the welcome page), shut down one more time the station, only insert the ext3 card in its left side, go in the store tools menu, clean and recreate the store, and then power on the digitizer. See down.


(version 366-3)

2014


Once the store card is recognized by the digitizer (signals can be seen on the status page), replace flash cards at their respective location (miniseed at left, store at right in the adapter) after the Taurus had been powered down. Check on the main screen that everything is OK before leaving the site.


(version 366-3)

2014


V) Compact Flash cards formatting

2 types of Compact Flash cards are found in the Taurus. These flash cards are located under the digitizer media door.

1) Card for store recording

This card is located at the right on an adapter. Its format is ext3. Formatting it has to be done only under linux (under windows, its format is not recognized)

Formatting process:

- Open a terminal - Introduce the Compact Flash card in the media reader - Plug the media reader to the computer - mount to know the external device name (often /dev/sdb1) - umountexternal_device_name - mke2fs j I 128 external_device_name

Formatting card can be also done using the TAURUS menu "store tools" then "delete store" then "destroy and recreate".

2) Card for miniseed data recording

This card is located at the left side. Its format is FAT32. Formatting it can be done under windows or under linux.

Formatting procedure under windows:

- Introduce the Compact Flash card in the media reader - Plug the media reader to the computer - START / work desk - Select the corresponding removable disk and right click - Formatting - Umount the removable disk before plugging it out.


(version 366-3)

2014


Formatting procedure under Linux:

- Open a terminal - Introduce the Compact Flash card in the media reader - Plug the reader to the computer - mount to know the external device name (often /dev/sdb1) - umountexternal_device_name - mkfs t vfatF 32 external_device_name

Formatting card can be also done using the TAURUS menu "data archive" then "delete all files".

document_taurus_field_check-366-3.pdf

Documents