MIDC/AIM Station Information
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R#StationNotes
1STAC
  • 1-Minute Irradiance and Meteorological Data
    • Data Sample rate is every 1 second with 1-minute average output.
    • The CR1000 is a table based operating system, data is converted from table to array format after data collection, also any non-numeric values are converted to -99999.
  • 30-Minute GPS-based Precipitable Water Vapor measurements
    • Raw data is sampled by Trimble Net9R data acquisition every 30 or 60 seconds and send to UCAR every hour for data processing.
    • PWV processed data is grabbed by MIDC every hour (25 minutes from the top of the hour) from the UCAR web site and converted to "classic" Campbell data logger format so that it can be made available on the MIDC web site, which requires converting UTC to Mountain Standard Time (MST). Note: Prior to January 2017 the SolarTAC PWV data on the UCAR web site was using a different station identifier.
    • Data processing at UCAR takes 1 hour 35 minutes and resulting data sample rate is 30 minutes.
  • 1 and 10-Minute Aerosol Optical Depth (AOD) measurements
    • Raw direct normal data is sampled by Prede POM-02 every 1 minute and a raw zenith/azimuth scan is sampled every 10 minutes. Raw data is sent to ESR every hour for data processing.
    • The ESR has two methods (each with two levels) for proccessing data, the SkyNet SkyRad Method and the ESR SunRad Method.
    • Each method has two data streams (level 0 and 1.1) which are grabbed by MIDC once a day (2 hours after midnight) from the ESR web site and converted to "classic" Campbell data logger format so that it can be made available on the MIDC web site. Resulting sample rate will be as frequent as every 1 minute for ESR method and 10 minute for SkyNet method.
    • Data processing at ESR can take a few days for Level 0 and a few months for Level 1.1. ESR does not process data from the 315, 940, 1627, and 2200nm wavelengths.
    • The Level 1.1 data set is of higher quality than level 0. ESR reprocesses all the Level 0 data at the end of each month using a new solar calibration constant to produce the Level 1.1 data.
    • Please visit the ESR website for an introduction, methodology, and further information regarding the data processsing.