PowerSDI

Calculate Standardised Drought Indices Using NASA POWER Data

CRAN Package

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).


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Insights

Last 30 days

This package has been downloaded 164 times in the last 30 days. Enough downloads to make a small wave in the niche community. The curiosity is spreading! The following heatmap shows the distribution of downloads per day. Yesterday, it was downloaded 4 times.

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0 downloadsMar 2, 2025
5 downloadsMar 3, 2025
7 downloadsMar 4, 2025
5 downloadsMar 5, 2025
8 downloadsMar 6, 2025
4 downloadsMar 7, 2025
4 downloadsMar 8, 2025
1 downloadsMar 9, 2025
4 downloadsMar 10, 2025
6 downloadsMar 11, 2025
11 downloadsMar 12, 2025
3 downloadsMar 13, 2025
5 downloadsMar 14, 2025
7 downloadsMar 15, 2025
4 downloadsMar 16, 2025
2 downloadsMar 17, 2025
9 downloadsMar 18, 2025
3 downloadsMar 19, 2025
12 downloadsMar 20, 2025
8 downloadsMar 21, 2025
4 downloadsMar 22, 2025
6 downloadsMar 23, 2025
6 downloadsMar 24, 2025
11 downloadsMar 25, 2025
5 downloadsMar 26, 2025
6 downloadsMar 27, 2025
4 downloadsMar 28, 2025
1 downloadsMar 29, 2025
5 downloadsMar 30, 2025
4 downloadsMar 31, 2025
4 downloadsApr 1, 2025
0 downloadsApr 2, 2025
0 downloadsApr 3, 2025
0 downloadsApr 4, 2025
0 downloadsApr 5, 2025
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The following line graph shows the downloads per day. You can hover over the graph to see the exact number of downloads per day.

Last 365 days

This package has been downloaded 2,293 times in the last 365 days. Consider this 'mid-tier influencer' status—if it were a TikTok, it would get a nod from nieces and nephews. The day with the most downloads was Sep 11, 2024 with 29 downloads.

The following line graph shows the downloads per day. You can hover over the graph to see the exact number of downloads per day.

Data provided by CRAN


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Dependencies

  • Imports3 packages
  • Suggests5 packages
  • Reverse Imports1 package