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Important Hardware/Software Notes for Researchers Using PASSCAL Equipment

This page includes important Hardware/Software Notes for Researchers Using PASSCAL Equipment. January 17, 2019: GPS Rollover

Late 2018 PASSCAL learned of a GPS week rollover event that can affect data logger performance and timing. PASSCAL has acquired a GNSS signal generator that can emulate GPS satellite signals. This satellite emulator allows us to test PASSCAL equipment that relies on GPS timing and to determine how equipment will handle the GPS rollover event. To date, we have determined that some models of GPS engines are affected by the rollover. How the rollover errors manifest is dependent on the data logger’s model and firmware version of the GPS engine.

01/17/2019
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RT130 ALERT - Issue when using two 4GB CF cards

Jan. 5, 2015

PASSCAL recently received reports of RT130’s failing when using two RefTek 4G CF cards at moderately low temperatures during an Antarctic experiment. We have duplicated the failure in our lab and in our testing the failure was associated with a specific version of RefTek well board (RT526D). Although we have not had failures in our testing with earlier or later versions of the board, our sample set is small and we cannot rule out problems with these boards when using two 4G CF cards. We have communicated with RefTek about the issue and at this time they are in agreement with these findings.

2015-01-05
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Station Servicing Common Failures

Murphy was Right!

There is a long litany of things that can go wrong during station servicing, including:

2009-09-17
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IRIS - Incorporated Research Institutions for Seismology New Mexico Institute of Mining and Technology
IRIS PASSCAL Instrument Center
New Mexico Tech
100 East Road, Socorro, NM 87801
Telephone (575) 835-5070
Fax (575) 835-5079