To cite the package:

  U Pérez-Goya, M Montesino-SanMartin, A F Militino, M D Ugarte (2024).
  rsat: Dealing with Multiplatform Satellite Images from Landsat,
  MODIS, and Sentinel. R package version 0.1.21.
  https://CRAN.R-project.org/package=rsat.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rsat: Dealing with Multiplatform Satellite Images from Landsat, MODIS, and Sentinel},
    author = {{U P{\'e}rez-Goya} and {M Montesino-SanMartin} and {A F Militino} and {M D Ugarte}},
    year = {2024},
    note = {R package version 0.1.21},
    url = {https://CRAN.R-project.org/package=rsat},
  }

To cite the gap filling method implemented in the function
genSmoothingIMA:

  Militino, A.F., Ugarte, M.D., Pérez-Goya, U., M G Genton (2019).
  Interpolation of the Mean Anomalies for Cloud-Filling in Land Surface
  Temperature and Normalized Difference Vegetation Index. IEEE
  Transactions on Geoscience and Remote Sensing 2019. 57(8), pp
  6068-6078. (Open-access)
  doi:http://dx.doi.org/10.1109/TGRS.2019.2904193

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Interpolation of the Mean Anomalies for Cloud-Filling in Land Surface Temperature and Normalized Difference Vegetation Index},
    author = {{A F Militino} and {M D Ugarte} and {U P{\'e}rez-Goya} and {M G Genton}},
    journal = {IEEE Transactions on Geoscience and Remote Sensing},
    year = {2019},
    volume = {57},
    number = {8},
    pages = {6068--6078},
    url = {http://dx.doi.org/10.1109/TGRS.2019.2904193},
  }

To cite the smoothing method implemented in the function
genSmoothingCovIMA:

  Militino, A.F., Ugarte, M.D., Pérez-Goya, U. (2018). Improving the
  Quality of Satellite Imagery Based on Ground-Truth Data from Rain
  Gauge Stations. Remote Sensing 2018; 10(398). (Open-access)
  doi:http://dx.doi.org/10.3390/rs10030398

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Improving the Quality of Satellite Imagery Based on Ground-Truth Data from Rain Gauge Stations},
    author = {{A F Militino} and {M D Ugarte} and {U P{\'e}rez-Goya}},
    journal = {Remote Sensing},
    year = {2018},
    volume = {10},
    number = {398},
    pages = {1--16},
    url = {http://dx.doi.org/10.3390/rs10030398},
  }