Prepare SMAP Soil Moisture (SMP) data for the SDA workflow.

Usage

SMAP_SMP_prep(
  site_info,
  start_date,
  end_date,
  time_points,
  outdir,
  search_window = 30,
  export_csv = TRUE,
  update_csv = FALSE
)

site_info: Bety list of site info including site_id, lon, and lat.
start_date: Start date of SDA workflow.
end_date: End date of SDA workflow.
time_points: A vector contains each time point within the start and end date.
outdir: Where the final CSV file, and the CSV file from GEE are stored.
search_window: search window for locate available SMP values.
export_csv: Decide if we want to export the CSV file.
update_csv: Decide if we want to update current CSV file given an updated SMAP_gee.csv file

A data frame containing SMAP smp and sd for each site and each time step.

Dongchen Zhang