Power of non-parametric Mann-Kendall test and Spearman’s Rho test is highly influenced by serially correlated data. To address this issue, trend tests may be applied on the modified versions of the time series data by  Block Bootstrapping (BBS), Prewhitening (PW) , Trend Free Prewhitening (TFPW), Bias Corrected Prewhitening and Variance Correction Approach by calculating effective sample size.
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Önöz, B., & Bayazit, M. (2012) <doi:10.1002/hyp.8438>.
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Yue, S., & Wang, C. Y. (2002) <doi:10.1029/2001WR000861>.
Yue, S., Pilon, P., Phinney, B., & Cavadias, G. (2002) <doi:10.1002/hyp.1095>.
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Yue, S., & Wang, C. Y. (2004) <doi:10.1023/B:WARM.0000043140.61082.60>.

c(person("Sandeep Kumar", "Patakamuri",
email = "sandeep.patakamuri@gmail.com",
role = c("aut", "cre"),
comment = c(ORCID = "0000-0001-8965-8287")),
person("Nicole", "O'Brien",
email = "nobrien@uwaterloo.ca",
role = c("aut", "ctb")))
Sandeep Kumar Patakamuri [aut, cre]
(<https://orcid.org/0000-0001-8965-8287>),
Nicole O'Brien [aut, ctb]

R tools for processing Level 2 Cloud Mask products from MODIS
Package for processing downloaded MODIS cloud product HDF
files and derived files. Specifically, MOD35_L2 cloud product
files, and the associated MOD03 geolocation files (for
MODIS-TERRA); and MYD35_L2 cloud product files, and the
associated MYD03 geolocation files (for MODIS-AQUA).  The
package will be most effective if the user installs MRTSwath
(MODIS Reprojection Tool for swath products;
https://lpdaac.usgs.gov/tools/modis_reprojection_tool_swath),
and adds the directory with the MRTSwath executable to the
default R PATH by editing ~/.Rprofile.

Package for processing downloaded MODIS Cloud Product HDF
files and derived files. Specifically, MOD35_L2 cloud product
files, and the associated MOD03 geolocation files (for
MODIS-TERRA); and MYD35_L2 cloud product files, and the
associated MYD03 geolocation files (for MODIS-AQUA).  The
package will be most effective if the user installs MRTSwath
(MODIS Reprojection Tool for swath products;
https://lpdaac.usgs.gov/tools/modis_reprojection_tool_swath),
and adds the directory with the MRTSwath executable to the
default R PATH by editing ~/.Rprofile.