check_for_matching_geolocation_files_mod02nrt: Checks that every MODIS calibrated radiance project HDF has a...

In proccalibrad: Extraction of Bands from MODIS Calibrated Radiances MOD02 NRT

Description

Each MOD02 calibrated radiance product file requires a corresponding MOD03 geolocation file to be successfully processed with the MRTSwath tool.

Usage

check_for_matching_geolocation_files_mod02nrt(moddir = getwd(),
  modtxt = "MOD02", geoloctxt = "MOD03", return_geoloc = FALSE,
  return_product = FALSE)

Arguments

moddir	the string describing the directory containing the MOD02 and MOD03 files; both must be in the same directory. Default: getwd(), which gives the present working directory.
modtxt	the text string indicating which HDF files are the MODIS calibrated radiance product (or hypothetically, other product). Default: MOD02 (MODIS calibrated radiance product)
geoloctxt	the text string indicating which HDF files are the MODIS geolocation files (or hypothetically, another set of files). Default: MOD03
return_geoloc	if TRUE, return the list of unmatched geolocation files (e.g. MOD03 )
return_product	if TRUE, return the list of unmatched product files (e.g. MOD02)

Details

MRTSwath is the MRT (MODIS Reprojection Tool) for the MODIS

E.g. this calibrated radiance file:

MOD021KM.A2016209.0515.005.NRT.hdf

...goes with this corresponding geolocation file:

MOD03.A2016209.0515.005.NRT.hdf

...which is a large file (~30 MB) containing detailed information on the position, tilt, etc. of the MODIS satellite. MRTSwath tool needs one of each, however.

Value

data.frame of matching files; or a list of non-matching files, if return_geoloc or return_product are TRUE.

Author(s)

Rishabh Gupta [e-mail]

Examples

# Check your working directory
moddir = getwd()

# Here are some example MODIS files in mod02nrt/extdata/
# Code excluded from CRAN check because it depends on modiscdata
## Not run: 
library(devtools)
library(modiscdata)
moddir = system.file("extdata/2002raw/", package="modiscdata")

# You need to have some e.g. MOD files in it (from the MODIS-TERRA platform)
list.files(path=moddir, pattern="MOD")
list.files(path=moddir, pattern="MOD")

# Check for matches (for MODIS-TERRA platform)
check_for_matching_geolocation_files_mod02nrt(moddir=moddir, modtxt="MOD02", geoloctxt="MOD03",
 return_geoloc=FALSE, return_product=FALSE)

## End(Not run)

proccalibrad documentation built on May 2, 2019, 3:18 p.m.