Fig. 2. Sample station deployment and monitoring visiting sheets from which the information in Appendix A was obtained:

Station Installation Instructions (LARSE-1993)

Station#: ____________ Date (MM/DD/YY) _______/_______/________

Time of arrival (local time) ___________ Operator ________________

DAS number __________ Clock Type _________

Sensor type ________ Sensor number ______________

1. Install REFTEK and sensors

a. Dig a 2 ft. deep and 2 ft diameter hole (or less) for seismometers.

Level the sensors carefully. Orientation: channel 1 -> Vertical,

channel 2 -> magnetic north and channel 3 -> magnetic east.

b. Dig a 2.5 ft by 2.5 ft by 1.5 ft hole (less than 5 ft. away from the

sensor hole for environment purpose) for DAS, car battery and timing

device. Put battery in a trash bag, then put all in thick plastic bag

(4mm thick) toprotect the equipment from dirt and water.

2. Check battery voltage ___________(volts) (Must be 12V or high).

3. Connect battery -- DAS, DAS -- Sensor, DAS -- GPS (or Omega) and

DAS -- Hand terminal. (Set up antenna for stations using OMEGA)

4. (optional) Receive parameters from DAS. Press COMMNCTNS/RECV PRMS.

Check if parameters are correct. Send parameters back if you

have modified them (Press COMMNCTNS/SEND PRMS).

5. (optional) Monitor. Press MONITOR. (to see if all the channels are Okay)

6. Bury the seismometer hole carefully. Do step 5 again.

7. System reset. Press UTILITIES/SYS RESET.

8. Start acquisition. Press COMMNCTNS/START ACQ. Zero delay time.

9. Look at DAS status and record below

TIME ________________

KIN OMGA __________ ACQ __________ ______(e.g. STAT ON)

EVENTS ____________

BLKS US ___________ BLKS AV ___________

10. Quit DAS status and Unplug HT or AT.

11. Bury the DAS hole carefully.

Time of Departure (local time) _________________________.

PLEASE NOTE ANY SPECIAL PROBLEMS ON THE BACK SIDE OF THIS SHEET.

Station Visit Instructions (LARSE-1993)

Station#: ____________ Date (MM/DD/YY) _______/_______/________

Time of arrival (local time) ___________ Operator ________________

DAS # __________ Clock Type _________

1. Look for:

Signs of water pooling in sensor hole. YES ____; NO _____.

Signs of animal intrusion. YES _____; NO _____.

2. Check battery voltage _____________(volts).

3. Connect hand terminal (or field computer) and turn it on (Don't disturb the sensor).

(If voltage is low and communication failure when press TIME, go to Step 6)

4. Check DAS status. Press UTILITIES/DAS STATE and record below

JULIAN DAY __________ TIME _____________

CLOCK _________________________(e.g. UTC LK PLL)

ACQ _________ _____(e.g. STRT ON) EVENTS ________

BLKS US __________ BLKS AV ___________

5. Stop acquistion. Press COMMNCTNS/STOP ACQ and wait for FINISHED.

6. Swap DAS and battery. Connect battery--DAS, DAS--Sensor, DAS--GPS (or

Omega) and DAS--Hand terminal. (Set up antenna for stations using OMEGA)

Be careful of polarity. Red ( + ); Black ( - ).

Label old DAS immediately with: Station #, DAS #, Year, Day #, and Operator

7. Check battery voltage ______________(volts) (Must be 12V or high).

8. New DAS# _____________

9. Monitor. Press MONITOR. (to see if all the channels are okay)

10. System reset. Press UTILITIES/SYS RESET.

11. Start acquisition. Press COMMNCTNS/STRT ACQ. Zero delay time.

12. Look at DAS status and record below

JULIAN DAY __________ TIME _____________

CLOCK _________________________(e.g. UTC LK PLL)

ACQ _________ _____(Must be STRT ON) EVENTS __________

BLKS US __________ BLKS AV ___________

13. Quit DAS status and Unplug HT or AT.

14. Bury the DAS hole carefully.

Time of Departure (local time) _________________________.

PLEASE NOTE ANY SPECIAL PROBLEMS ON THE BACK SIDE OF THIS SHEET.

Station Pick-up Instructions (LARSE-1993)

Station#: ____________ Date (MM/DD/YY) _______/_______/________

Time of arrival (local time) ___________ Operator ________________

DAS # __________ Clock Type _________

1. Look for:

Signs of water pooling in sensor hole. YES ____; NO _____.

Signs of animal intrusion. YES _____; NO _____.

2. Connect hand terminal (or field computer) and turn it on.

(If voltage is low and communication failure when press TIME, go to Step 6)

3. Check DAS status. Press UTILITIES/DAS STATE and record below

JULIAN DAY __________ TIME _____________

CLOCK _________________________(e.g. UTC LK PLL)

ACQ _________ _____(e.g. STRT ON) EVENTS ________

BLKS US __________ BLKS AV ___________

4. Stop acquistion. Press COMMNCTNS/STOP ACQ and wait for FINISHED.

Label DAS immediately with: Station #, DAS #, Year, Day #, and Operator

5. Quit DAS status and Unplug HT or AT.

6. Pack up DAS (and disk) and battery.

7. Dig out sensors. Write down the sensor#__________________________________

Be sure to lock the sensors:

a). L4C-3D: place it 45 degrees with handle at bottom.

b). UCLA L4C: place it verticallywith connection plug at bottom.

c). Others: no special locking position.

Note: all the sensors should be protected by soft filling materials

when travelling.

8. Bury the holes carefully, clean up the surrounding. The original environment

should be recovered completely.

Time of Departure (local time) _________________________.

PLEASE NOTE ANY SPECIAL PROBLEMS ON THE BACK SIDE OF THIS SHEET.