{
  "version": 2,
  "source_name": "NOAA GOES DCS SHEF Physical Element Codes",
  "source_url": "https://www.noaasis.noaa.gov/GOES/GOES_DCS/schefcodes.html",
  "generated_at": "2026-05-20",
  "notes": [
    "Local dashboard reference only. SHEF code meanings do not verify pseudo-binary field order, scale, precision, calibration, or platform-specific decoding.",
    "Field assignment remains station/profile evidence and must not be promoted by this dictionary alone."
  ],
  "codes": {
    "PC": {
      "label": "Precipitation, accumulator",
      "unit": "IN, MM",
      "category": "Pressure and precipitation",
      "note": "SHEF physical element code definition; not a field-order source."
    },
    "PPD": {
      "label": "Public HADS PPD precipitation-related tag",
      "unit": "",
      "category": "Local HADS tag helper",
      "note": "Local dictionary support for public HADS tag expansion only; verify station field assignment separately."
    },
    "PP": {
      "label": "Precipitation, actual increment",
      "unit": "IN, MM",
      "category": "Pressure and precipitation",
      "note": "SHEF physical element code definition; not a field-order source."
    },
    "PN": {
      "label": "Precipitation normal",
      "unit": "IN, MM",
      "category": "Pressure and precipitation",
      "note": "SHEF physical element code definition; not a field-order source."
    },
    "PA": {
      "label": "Atmospheric pressure",
      "unit": "IN-HG, KPA",
      "category": "Pressure and precipitation",
      "note": "SHEF physical element code definition; not a field-order source."
    },
    "HG": {
      "label": "Gage height / river stage",
      "unit": "FT, M",
      "category": "Height",
      "note": "NOAA SHEF label is Height, river stage."
    },
    "HM": {
      "label": "Tide height, MLLW",
      "unit": "FT, M",
      "category": "Height",
      "note": "NOAA SHEF label is Height of tide, MLLW."
    },
    "TA": {
      "label": "Air temperature, dry bulb",
      "unit": "DF, DC",
      "category": "Temperature",
      "note": "SHEF physical element code definition; not a field-order source."
    },
    "TW": {
      "label": "Temperature, air maximum",
      "unit": "DF, DC",
      "category": "Temperature",
      "translates_to": "TAIRZXZ",
      "note": "NOAA SHEF official meaning is air maximum temperature. Station context may imply a water-quality temperature candidate, but that is not the default SHEF meaning and does not verify PB field order or scale."
    },
    "TB": {
      "label": "Temperature in bare soil at depth",
      "unit": "",
      "category": "Temperature",
      "note": "Coded/depth format may require additional SHEF context."
    },
    "VB": {
      "label": "Battery voltage",
      "unit": "volt",
      "category": "Generation and generator data",
      "note": "SHEF physical element code definition; not a field-order source."
    },
    "QR": {
      "label": "Discharge, river",
      "unit": "KCFS, CMS",
      "category": "Discharge",
      "note": "SHEF physical element code definition; not a field-order source."
    },
    "US": {
      "label": "Wind speed",
      "unit": "MI/HR, M/SEC",
      "category": "Wind data",
      "note": "SHEF physical element code definition; not a field-order source."
    },
    "UD": {
      "label": "Wind direction",
      "unit": "whole degrees",
      "category": "Wind data",
      "note": "SHEF physical element code definition; not a field-order source."
    },
    "UQ": {
      "label": "Wind direction and speed combined",
      "unit": "SSS.SDDD",
      "category": "Wind data",
      "note": "Combined scalar encodes speed and direction; do not chart as one simple real-world value unless decoded."
    },
    "UE": {
      "label": "Wind-related code",
      "unit": "",
      "category": "Local HADS tag helper",
      "note": "Local dictionary support for public HADS tag display only; verify code use before profile promotion."
    },
    "UPC": {
      "label": "Wind peak/gust-related code",
      "unit": "",
      "category": "Local HADS tag helper",
      "note": "Local dictionary support for public HADS tag display only; verify code use before profile promotion."
    },
    "XR": {
      "label": "Relative humidity",
      "unit": "%",
      "category": "Weather codes",
      "note": "NOAA SHEF label is Humidity, relative."
    },
    "WC": {
      "label": "Water conductance",
      "unit": "uMHOS/CM",
      "category": "Water quality",
      "note": "NOAA SHEF label is Water, conductance."
    },
    "WS": {
      "label": "Water salinity",
      "unit": "PPT",
      "category": "Water quality",
      "note": "NOAA SHEF label is Water, salinity."
    },
    "WX": {
      "label": "Dissolved oxygen saturation percent",
      "unit": "%",
      "category": "Water quality",
      "note": "NOAA SHEF label is Dissolved Oxygen - Saturation Percent."
    },
    "WO": {
      "label": "Water dissolved oxygen",
      "unit": "PPM, MG/L",
      "category": "Water quality",
      "note": "NOAA SHEF label is Water, dissolved oxygen."
    },
    "WP": {
      "label": "Water pH",
      "unit": "PH value",
      "category": "Water quality",
      "note": "NOAA SHEF label is Water, pH."
    },
    "WT": {
      "label": "Water turbidity",
      "unit": "JTU",
      "category": "Water quality",
      "note": "NOAA SHEF label is Water, turbidity."
    },
    "RS": {
      "label": "Radiation/sunshine-related code",
      "unit": "",
      "category": "Local HADS tag helper",
      "note": "Local dictionary support for public HADS tag display only; verify code use before profile promotion."
    },
    "DH": {
      "label": "Humidity/dewpoint-related code",
      "unit": "",
      "category": "Local HADS tag helper",
      "note": "Local dictionary support for public HADS tag display only; verify code use before profile promotion."
    }
  }
}