## PowerSDI: Calculate Standardised Drought Indices Using NASA POWER Data

A set of functions designed to calculate the standardised
precipitation and standardised precipitation evapotranspiration indices
using NASA POWER data as described in Blain et al. (2023)
<doi:10.2139/ssrn.4442843>. These indices are calculated using a reference
data source. The functions verify if the indices' estimates meet the
assumption of normality and how well NASA POWER estimates represent
real-world data. Indices are calculated in a routine mode. Potential
evapotranspiration amounts and the difference between rainfall and potential
evapotranspiration are also calculated. The functions adopt a basic time
scale that splits each month into four periods. Days 1 to 7, days 8 to 14,
days 15 to 21, and days 22 to 28, 29, 30, or 31, where 'TS=4' corresponds to
a 1-month length moving window (calculated 4 times per month) and 'TS=48'
corresponds to a 12-month length moving window (calculated 4 times per
month).

Version: |
1.0.0 |

Depends: |
R (≥ 3.1.0) |

Imports: |
graphics, lmom, lubridate, nasapower, stats |

Suggests: |
knitr, rmarkdown, testthat (≥ 3.0.0), vcr (≥ 0.6.0), vdiffr (≥ 1.0.0) |

Published: |
2024-01-15 |

DOI: |
10.32614/CRAN.package.PowerSDI |

Author: |
Gabriel Constantino Blain
[aut, cre],
Graciela R. Sobierajski
[aut],
Leticia L. Martins
[aut],
Adam H. Sparks
[aut] |

Maintainer: |
Gabriel Constantino Blain <gabriel.blain at sp.gov.br> |

BugReports: |
https://github.com/gabrielblain/PowerSDI/issues |

License: |
MIT + file LICENSE |

URL: |
https://github.com/gabrielblain/PowerSDI |

NeedsCompilation: |
no |

Language: |
en-GB |

Citation: |
PowerSDI citation info |

Materials: |
README NEWS |

In views: |
Hydrology |

CRAN checks: |
PowerSDI results |

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