Engineering topics
Publications and source records attributed to Ermold, Brian.
This datastream encapsulates the contents of the ASSIST "hkp" (housekeeping) files. The reported values are from one-wire sensors that capture and report a variety of system measurements including T, RH, and voltages.
This datastream encapsulates the contents of the ASSIST "cha" files of calibrated sky radiances, brightness temperatures and noise equivalent radiance files.
This datastream encapsulates the contents of the ASSIST "chb" files of calibrated sky radiances, brightness temperatures and noise equivalent radiance files.
The Atmospheric Radiation Measurement (ARM) Climate Research Facility performs routine in situ and remote-sensing observations to provide a detailed and accurate description of the Earth atmosphere in diverse climate regimes. The result is a diverse data sets containing observational and derived data, currently accumulating at a rate of 30 TB of data and 150,000 different files per month (http://www.archive.arm.gov/stats/storage2.html). Continuing the current processing while scaling this to even larger sizes is extremely important to the ARM Facility and requires consistent metadata and data standards. The standards described in this document will enable development of automated analysis and discovery tools for the ever-growing volumes of data. It also will enable consistent analysis of the multiyear data, allow for development of automated monitoring and data health status tools, and facilitate development of future capabilities for delivering data on demand that can be tailored explicitly to user needs. This analysis ability will only be possible if the data follows a minimum set of standards. This document proposes a hierarchy that includes required and recommended standards.
AOS O3 averages during calibration cycle used to calculate offset correction
The aospsap3w1m process reads in data from the aospsap3w.b1 datastream and applies a dilution correction to the aerosol sample flow rate, and a filter loading correction to the absorption coefficients. The filter loading is corrected by multiplying by the Weiss transfer function f_w = 1/1.031 * 1/1.22 * (1/(1.0796 Tr + 0.71)) = 1 / (1.3579 Tr + 0.8931) where Tr is the transmittance for a given wavelength. This form incorporates the initial PSAP transfer function with modifications in Bond 1999 and subsequently in Ogren 2010. The one second (1s) data stream is only created for BNL psap3w instruments where the 1 second samples are available. The one minute (1m) data streams contain the averages of the one second data.