Atmospheric Radiation Measurement Climate Research Facility US Department of Energy

twrmr > Tower Water-Vapor Mixing RatioVAP Type(s) > Baseline

The purpose of the Tower Water-Vapor Mixing Ratio (TWRMR) value-added product (VAP) is to calculate water-vapor mixing ratios at the 25-meter and 60-meter levels of the meteorological tower and also report best-estimate temperature, relative humidity, and pressure measurements at the 2-meter, 25-meter, and 60-meter levels of the meteorological tower at the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) Central Facility.

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The VAP consolidates inputs from a variety of different ARM datastreams and produces a single output file each day, with data points spaced in one-minute intervals.

This VAP was updated in June 2021. Please consult the technical report for a detailed breakdown of the changes made.


  • Fixed
  • AMF1
  • AMF2
  • AMF3


twr: Facility-specific multi-level Meteorological Instrumentation