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

Station Enclosure for Year Round Polar Programs

Most electronic equipment and batteries used for seismic stations become unreliable at temperatures below -45C.  For this reason, it is very challenging to make year around seismic studies in the Arctic and especially the Antarctic, where winter temperature can dip below -80C. On the East Antarctica Plateau, ambient temperatures a couple of feet below the snow surface are between -50C and -60C.

Data Downloading & Backups from RT130's

RT130 data is downloaded from the CF cards to .zip files using the NEO program.  The NEO program is included in the PASSOFT software package and can be started from the command line or from the NEO button on PASSCAL field computers. After the data is downloaded it should be reviewed to make sure that it is complete and two backup copies should be made.

Programming a Q330 with Hocus

Q330 Lab Bench Testing



First Part of Q330 SET-UP.


***Disable Internet LAN connection 1 and Enable LAN connection 2.


Connect Ethernet cables to Qnet connection on Q330.

Run Hocus.

Enumerate. Refer to Figure 1. Note: if any Q330s will not enum., check IP/FW using Willard.

Power Box

The Power Box is a combination of enclosure, solar charge controller, and connectors which ensure the battery is charged and the instrumentation is powered. Below are some pictures of the new PASSCAL power box (and below that is the old standard PASSCAL power box) . All the power boxes have a 12-15 amp load capacity and a Low Voltage Disconnect (LVD) to prevent damage to the battery. These boxes are designed to work with any nominal 12 volt solar panel and any deep cycle gel-cell lead acid battery.

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Batteries are PI Supplied.

Batteries come in two main types, primary which are single use and secondary which are rechargeable.

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Power Systems


Regardless of the type of datalogger and sensor, the one constant they all need is power.



Because of the relative isolation of seismic stations the most common power source is a battery. Batteries come in two main types: primary and secondary. Secondary batteries are rechargable and primary batteries are used once then discarded.

Most experiments that utilize Q330's and RT130's will use deep cycle lead-acid batteries. The size and capacity of the lead-acid battery will vary with datalogger type, sensor type, telemetry, solar panel size, and geographic location.

Most experiments that utilze Texans (RT125A's) use two D-cell batteries per station. In this configuration the Texan can run for approximately 120 hours at 100 samples per second.

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A field QC tool introduction - Questions and Answers

  Questions and Answers for Statistics Player (EzPlayer) (1) What is Statistics Player (EzPlayer)

Statistics Player is a tool for you to play back and display a statistics file including the Means, RMSs, and Standard Deviations of your raw miniseed data so that you can have an overview of your experiment results very quickly. It also can show a rough waveform with a two-hour period of your real data at your selection. It is very efficient!

(2) How do I create the statistics file?

You can create the statistics file while you are downloading your experiment data from Quanterra Balers via EzBaler downloader. Alternatively, you can use a python script called to create the statistics file after you download your data.

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