contract_phenocam       Contracts the file from 1-day to a 3-day time
                        step
daylength               Calculates day length (in hours) and the solar
                        elevation
detect_outliers         Detect outliers in PhenoCam time series
download_phenocam       Function to download and post-process PhenoCam
                        time series
expand_phenocam         Expand a PhenoCam time series from 3-day to a
                        1-day time step
grvi                    Calculate green-red vegetation index (GRVI)
list_rois               Function to list all site regions-of-interst
                        (ROIs)
list_sites              Function to list all site meta-data
merge_daymet            Merge Daymet data with a PhenoCam time series
normalize_ts            Normalize PhenoCam time series
optimal_span            Calculates the optimal span for a loess spline
phenocam_explorer       Starts the phenocamr shiny interface
phenophases             Calculates phenophases, for rising and falling
                        parts of a time series
read_phenocam           Read PhenoCam time series data
smooth_ts               Smooths a PhenoCam time series
transition_dates        Calculates transition dates for a PhenoCam time
                        series
truncate_phenocam       Truncate a PhenoCam time series
write_phenocam          Write a phenocamr data structure to file
