#' BASE data example
#'
#' Continuous flux/met data (i.e., AmeriFlux BASE data product) for the
#' US-CRT site, as an example for demonstration. Also see AmeriFlux webpage
#' \url{https://ameriflux.lbl.gov/data/aboutdata/data-variables/#base} for
#' variable definitions and details.
#'
#' \itemize{
#'   \item TIMESTAMP_START - ISO timestamp start of averaging period
#'   (YYYYMMDDHHMM)
#'   \item TIMESTAMP_END - ISO timestamp end of averaging period (YYYYMMDDHHMM)
#'   \item CO2 - Carbon Dioxide (CO2) mole fraction in wet air (µmolCO2 mol-1)
#'   \item H2O - Water (H2O) vapor in mole fraction of wet air (mmolH2O mol-1)
#'   \item FC - Carbon Dioxide (CO2) turbulent flux (µmolCO2 m-2 s-1)
#'   \item NEE_PI - Net Ecosystem Exchange (µmolCO2 m-2 s-1)
#'   \item CH4 - Methane (CH4) mole fraction in wet air (nmolCH4 mol-1)
#'   \item FCH4 - Methane (CH4) turbulent flux (nmolCH4 m-2 s-1)
#'   \item H - Sensible heat turbulent flux (W m-2)
#'   \item LE - Latent heat turbulent flux (W m-2)
#'   \item G_1_1_1 - Soil heat flux at horizontal location #1 (W m-2)
#'   \item G_2_1_1 - Soil heat flux at horizontal location #2 (W m-2)
#'   \item WD - Wind direction (Decimal degrees)
#'   \item WS - Wind speed (m s-1)
#'   \item USTAR - Friction velocity (m s-1)
#'   \item ZL - data value
#'   \item MO_LENGTH - Monin-Obukhov Stability parameter (nondimensional)
#'   \item W_SIGMA - Standard deviation of vertical velocity fluctuations
#'    (m s-1)
#'   \item V_SIGMA - Standard deviation of lateral velocity fluctuations
#'   (m s-1)
#'   \item U_SIGMA - Standard deviation of along-wind velocity fluctuations
#'   (m s-1)
#'   \item T_SONIC - Sonic temperature (deg C)
#'   \item T_SONIC_SIGMA - Standard deviation of sonic temperature (deg C)
#'   \item PA - Atmospheric pressure (kPa)
#'   \item RH - Relative humidity (\%)
#'   \item TA - Air temperature (deg C)
#'   \item TS_1_1_1 - Soil temperature at horizontal location #1 (deg C)
#'   \item TS_2_1_1 - Soil temperature at horizontal location #2 (deg C)
#'   \item WTD - Water table depth (m)
#'   \item SWC - Soil water content (\%)
#'   \item NETRAD - Net radiation (W m-2)
#'   \item PPFD_IN - Photosynthetic photon flux density, incoming
#'   (µmolPhoton m-2 s-1)
#'   \item SW_IN - Shortwave radiation, incoming (W m-2)
#'   \item SW_OUT - Shortwave radiation, outgoing (W m-2)
#'   \item LW_IN - Longwave radiation, incoming (W m-2)
#'   \item LW_OUT - Longwave radiation, outgoing (W m-2)
#'   \item P - Rainfall (mm)
#' }
#'
#' @format A data frame with 336 rows and 36 variables
#' @source \url{https://ameriflux.lbl.gov/}
"amf_base"

#' BADM data example
#'
#' The BADM file provides a description, general background, geo-location,
#' relevant publications and references for the site. The BADM files also
#' list what is measured at the site (this list may include chamber, gradient
#' or other eddy covariance measurements that are a super-set of the data
#' available in AmeriFlux). Also see AmeriFlux web page
#' \url{https://ameriflux.lbl.gov/data/aboutdata/badm-data-product/}
#' for details.
#'
#' \itemize{
#'   \item SITE_ID - 6 digit AmeriFlux site ID (CC-Sss)
#'   \item GROUP_ID - A unique identifier for data entries belonging to the same
#'    instance of a reported variable group
#'   \item VARIABLE_GROUP - Define a set of variables that are reported together
#'   \item VARIABLE - Variable names
#'   \item DATAVALUE - Data value
#' }
#'
#' @format A data frame with 443 rows and 5 variables
#' @source \url{https://ameriflux.lbl.gov/}
"amf_bif"