# cmsaf: Tools for CM SAF Netcdf Data

The Satellite Application Facility on Climate Monitoring (CM SAF) is a ground segment of the European Organization for the Exploitation of Meteorological Satellites (EUMETSAT) and one of EUMETSATs Satellite Application Facilities. The CM SAF contributes to the sustainable observing of the climate system by providing Essential Climate Variables related to the energy and water cycle of the atmosphere (www.cmsaf.eu). It is a joint cooperation of seven National Meteorological and Hydrological Services, including the Deutscher Wetterdienst (DWD). The cmsaf R-package provides a small collection of R-functions, which are inspired by the Climate Data Operators (cdo). This gives the opportunity to analyse and manipulate CM SAF data without the need of installing cdo. The cmsaf R-package is tested for CM SAF netcdf data, which are structured in three-dimensional arrays (longitude, latitude, time) on a rectangular grid. Layered CM SAF data have to be converted with the provided `levbox_mergetime` function. The cmsaf R-package functions have only minor checks for deviations from the recommended data structure, and give only few specific error messages. Thus, there is no warranty of accurate results. Scripts for an easy application of the functions are provided at the CM SAF homepage (http://www.cmsaf.eu/EN/Products/Tools/Tools_node.html).

- Author
- Steffen Kothe <Steffen.Kothe@dwd.de>
- Date of publication
- 2016-10-13 00:33:28
- Maintainer
- Steffen Kothe <Steffen.Kothe@dwd.de>
- License
- GPL (>= 3)
- Version
- 1.7.0

## Man pages

- box_mergetime
- Function to combine netcdf files and simultaneously cut a...
- change_att
- Change attributes of a netcdf variable.
- checkfile
- Check the filename and directory.
- cmsaf.add
- Add the fields of two input netcdf files.
- cmsaf.addc
- Add a constant to a dataset.
- cmsaf.div
- Divide the fields of two input netcdf files.
- cmsaf.divc
- Divide data by a constant.
- cmsaf.mul
- Multiply the fields of two input netcdf files.
- cmsaf.mulc
- Multiply data with a constant.
- cmsaf-package
- cmsaf
- cmsaf.sub
- Subtract the fields of two input netcdf files.
- cmsaf.subc
- Add a constant to a dataset.
- dayrange
- This function determines the diurnal range.
- divdpm
- Divide by days per month.
- extract.period
- Remove a time period.
- fldmax
- Determine the field maximum.
- fldmean
- Determine the field mean.
- fldmin
- Determine the field minimum.
- get_time
- Convert time steps to POSIXct.
- levbox_mergetime
- Function to combine netcdf files and simultaneously cut a...
- mon.anomaly
- Determine monthly anomalies.
- monmax
- Determine monthly maxima.
- monmean
- Determine monthly means.
- monmin
- Determine monthly minima.
- monsd
- Determine monthly standard deviation.
- monsum
- Determine monthly sums.
- muldpm
- Multiply by days per month.
- multimonmean
- Determine multi-monthly means.
- multimonsum
- Determine multi-monthly sums.
- ncinfo
- Get information about the content of a netcdf file.
- read_nc
- Read netcdf variable.
- remapbil
- Bilinear grid interpolation.
- seas.anomaly
- Determine seasonal anomalies.
- seasmean
- Determine seasonal means.
- sellonlatbox
- Select a region by longitude and latitude.
- selmon
- Extract a list of months.
- selperiod
- Extract a list of dates.
- selpoint
- Extract data at a given point.
- seltime
- Extract specific timestep.
- selyear
- Extract a list of years.
- timmax
- Determine all-time maxima.
- timmean
- Determine mean of a timeseries.
- timmin
- Determine all-time minima.
- timsd
- Determine all-time seasonal standard deviations.
- trend
- Determine linear trends.
- wfldmean
- Determine the weighted field mean.
- year.anomaly
- Determine annual anomalies.
- yearmean
- Determine annual means
- yearsum
- Determine annual sums.
- ymonmax
- Determine multi-year monthly maxima.
- ymonmean
- Determine multi-year monthly means.
- ymonmin
- Determine multi-year monthly minima.
- ymonsd
- Determine multi-year monthly standard deviations.
- ymonsum
- Determine multi-year monthly sums.
- yseasmax
- Determine multi-year seasonal maxima.
- yseasmean
- Determine multi-year seasonal means.
- yseasmin
- Determine multi-year seasonal minima.
- yseassd
- Determine multi-year seasonal standard deviations.

## Files in this package

cmsaf |

cmsaf/NAMESPACE |

cmsaf/R |

cmsaf/R/seas.anomaly.R |

cmsaf/R/yearsum.R |

cmsaf/R/seltime.R |

cmsaf/R/trend.R |

cmsaf/R/cmsaf.addc.R |

cmsaf/R/levbox_mergetime.R |

cmsaf/R/cmsaf.divc.R |

cmsaf/R/ymonmean.R |

cmsaf/R/fldmean.R |

cmsaf/R/selmon.R |

cmsaf/R/checkfile.R |

cmsaf/R/dayrange.R |

cmsaf/R/selperiod.R |

cmsaf/R/fldmin.R |

cmsaf/R/ymonsum.R |

cmsaf/R/multimonsum.R |

cmsaf/R/sellonlatbox.R |

cmsaf/R/cmsaf.subc.R |

cmsaf/R/yearmean.R |

cmsaf/R/cmsaf.mul.R |

cmsaf/R/yseassd.R |

cmsaf/R/seasmean.R |

cmsaf/R/monmin.R |

cmsaf/R/extract.period.R |

cmsaf/R/cmsaf.add.R |

cmsaf/R/remapbil.R |

cmsaf/R/timmean.R |

cmsaf/R/read_nc.R |

cmsaf/R/ymonmax.R |

cmsaf/R/yseasmean.R |

cmsaf/R/fldmax.R |

cmsaf/R/wfldmean.R |

cmsaf/R/multimonmean.R |

cmsaf/R/monsum.R |

cmsaf/R/yseasmin.R |

cmsaf/R/yseasmax.R |

cmsaf/R/cmsaf.sub.R |

cmsaf/R/timmax.R |

cmsaf/R/cmsaf.mulc.R |

cmsaf/R/timmin.R |

cmsaf/R/divdpm.R |

cmsaf/R/mon.anomaly.R |

cmsaf/R/box_mergetime.R |

cmsaf/R/ymonmin.R |

cmsaf/R/change_att.R |

cmsaf/R/monmax.R |

cmsaf/R/monsd.R |

cmsaf/R/monmean.R |

cmsaf/R/timsd.R |

cmsaf/R/selpoint.R |

cmsaf/R/muldpm.R |

cmsaf/R/get_time.R |

cmsaf/R/ymonsd.R |

cmsaf/R/selyear.R |

cmsaf/R/ncinfo.R |

cmsaf/R/year.anomaly.R |

cmsaf/R/cmsaf.div.R |

cmsaf/MD5 |

cmsaf/DESCRIPTION |

cmsaf/man |

cmsaf/man/fldmin.Rd |

cmsaf/man/yseassd.Rd |

cmsaf/man/selpoint.Rd |

cmsaf/man/seltime.Rd |

cmsaf/man/monsum.Rd |

cmsaf/man/remapbil.Rd |

cmsaf/man/change_att.Rd |

cmsaf/man/cmsaf.divc.Rd |

cmsaf/man/yseasmean.Rd |

cmsaf/man/checkfile.Rd |

cmsaf/man/monsd.Rd |

cmsaf/man/selyear.Rd |

cmsaf/man/ymonmin.Rd |

cmsaf/man/timsd.Rd |

cmsaf/man/yseasmax.Rd |

cmsaf/man/cmsaf.subc.Rd |

cmsaf/man/muldpm.Rd |

cmsaf/man/mon.anomaly.Rd |

cmsaf/man/selmon.Rd |

cmsaf/man/yearsum.Rd |

cmsaf/man/seas.anomaly.Rd |

cmsaf/man/cmsaf.mul.Rd |

cmsaf/man/read_nc.Rd |

cmsaf/man/monmean.Rd |

cmsaf/man/cmsaf.addc.Rd |

cmsaf/man/cmsaf-package.Rd |

cmsaf/man/multimonmean.Rd |

cmsaf/man/trend.Rd |

cmsaf/man/year.anomaly.Rd |

cmsaf/man/timmax.Rd |

cmsaf/man/box_mergetime.Rd |

cmsaf/man/ymonmax.Rd |

cmsaf/man/extract.period.Rd |

cmsaf/man/divdpm.Rd |

cmsaf/man/ymonsd.Rd |

cmsaf/man/ymonsum.Rd |

cmsaf/man/monmax.Rd |

cmsaf/man/sellonlatbox.Rd |

cmsaf/man/dayrange.Rd |

cmsaf/man/yearmean.Rd |

cmsaf/man/multimonsum.Rd |

cmsaf/man/fldmean.Rd |

cmsaf/man/ncinfo.Rd |

cmsaf/man/timmin.Rd |

cmsaf/man/yseasmin.Rd |

cmsaf/man/cmsaf.add.Rd |

cmsaf/man/levbox_mergetime.Rd |

cmsaf/man/cmsaf.mulc.Rd |

cmsaf/man/get_time.Rd |

cmsaf/man/seasmean.Rd |

cmsaf/man/monmin.Rd |

cmsaf/man/selperiod.Rd |

cmsaf/man/fldmax.Rd |

cmsaf/man/wfldmean.Rd |

cmsaf/man/cmsaf.div.Rd |

cmsaf/man/cmsaf.sub.Rd |

cmsaf/man/timmean.Rd |

cmsaf/man/ymonmean.Rd |