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Long-term analysis of the corrective maintenance records of the ARM SGP CART.

The primary responsibility of Southern Great Plains (SGP) Site Operations is to operate and maintain the Atmospheric Radiation Measurement (ARM) instruments at the SGP Cloud and Radiation Testbed (CART) facilities. Since 1992, SGP Site Operations has maintained detailed corrective maintenance records for the ARM SGP instruments as part of the SGP Operations and Maintenance Information System (OMIS). These records are available online at http://www.ops.sgp.arm.gov. We analyzed these records back to 1995. They reveal maintenance trends that vary by instrument type, location, and year. They provide valuable insights into the performance of the instruments and indicate areas where improvements would yield the greatest benefits.