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Here are some of the articles that have been recently posted to the PASSCAL website:

Programming Q330's

Q330 parameters are created using the Willard program.  Because the Q330 has a complicated and highly flexible parameter set, it should only be created by experienced users.  Contact PASSCAL staff for assistance in developing a Q330 parameter set for your application.

Loading Programs From a Clie To RT130's

This page is meant as a quick reference guide for using the Clié program "PFC-130" to load configuration parameters to a RT130. When deploying RT130's in the field, you will be provided an installation worksheet which covers the same steps but with more detail specific to your experiment.

Basic Guide for Loading Parameters to a RT130 from a Clié

1. Open PFC-130, on the Clié

2. Select Work with Configuration

3. Load (Load Configuration Pre-Written or Loaded Config File)

4. Select OK

5. Verify Configuration Name top of screen

6. Send to DAS

7. Select OK

8. Select Done

9. Re-Enter Work with Configuration

10. Select from DAS (Load from DAS)

11. Edit

12. Confirm Experiment Name

Computer Best Practices

Hard drives and disk space Drives and partitions

IRIS PASSCAL prepared laptops all come with a separate partition for user and experiment data that can be accessed at /data

PASSCAL linux laptops (PCs) come with two hard drives.  On each drive is a complete, tested installation of Fedora linux and a current version of PASSOFT. Each drive is bootable and provides a redundant system. On each drive space is allocated for data and is RAIDed together as the /data directory accessible from either installation.

If you are having a problem and want to try using the backup installation, start tapping the Escape key after the BIOS has finished loading in order to see the GRUB menu.  Then select one of the installations of Fedora to boot into it.  If you saved your data in /data, you will still have access when booted from the backup installation.

Guralp CMG-40T-1 Short Period Sensor

The CMG 40T-1sec seismometer looks, on the outside, just like the CMG 40T-30sec, intermediate period seismometer. Its response, however, is tuned to short-period signals (1-100Hz). One hundred of these feedback seismometers were purchased for the Flexible Array sensor pool.

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Short-Period Sensors

PASSCAL Short-period Sensors: Sercel  L-22 Guralp CMG-40T-1 Features:

Short-period sensors are rugged three-component seismometers that cover the frequency band from 1 Hz to 100 Hz. These sensors are used in both passive and active-source experiments. PASSCAL's short-period sensors can be either feedback seismometers requiring power or conventional, passive seismometers requiring no external power.

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Intermediate Sensors

PASSCAL Intermediate-Period Sensors: Guralp CMG3-ESP Guralp CMG40T Nanometrics Trillium40 Features:

The low-period corner is 30 seconds for the 3 Guralps and is 40 seconds for the Nanometrics sensor. All are 3-component feedback sensors. The CMG40T and Trillium40 masses do not lock. One should still ship and handle them with care so as not to damage them. The CMG3-ESP has masses that require manual locking and unlocking.  For information on the CMG40T with corner-frequencies of 1-sec, click here.

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Geospace Y-28 (GS11-3D) High Frequency Sensor

  Salient Features: This 3-channel sensor has a frequency of 4.5Hz, is critically damped at .707 and has a sensitivity of 32 V/m/s. Used for (but not limited to) active source (land and off-shore excitations), glacial movements, local earthquake and aftershock studies. Manufacturer Website: PASSCAL Documents: Connector wiring information here Installation & Troubleshooting Documents: Y-28 Orientation and Installation Tips here One-pager field sheet
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4.5Hz High Frequency Single Component Sensor

Salient Features These single component geophones are available as vertical units for use with the Texan digitizer and as vertical 6-channel strings for use with the multi-channel digitizer systems.  The multi-channel strings are rarely used. This single channel vertical geophone has a frequency of 4.5Hz, damping of .707 critical and a sensitivity of 100 V/m/s. The primary use of these geophones is for active source experiments. Manufacturer Documents: PASSCAL’s 4.5Hz, vertical geophones were manufactured by Geospace under part number GS-11D. Installation & Troubleshooting:

 Installation requires a separate bubble level to be placed on top of the geophone for proper leveling.

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Solar Panels

PASSCAL has both 30 and 65 Watt solar panels available.

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