readSAGOB: Read ASCII files containing satellite for specific situations...

In steingod/R-osisaf: Useful functions for handling EUMETSAT Ocean and Sea Ice SAF data

Description

Read ASCII files containing satellite data for specific situations. These files have usually been created for specific classes. The files have a five records long header specifying the contents of the file. Each file contain satellite data for a spcific situation (e.g. cloud free water, clouds, snow, etc). Visible channels are corrected for the solar zenith angle.

A sample of the files read are given below:

 [Storage class] WATER
 [Station and time identification] * *.*.* *:* UTC
 [Number of requested parameters] 9
 [Parameternames] SuZ SaZ SuA SaA CH1 CH2 CH3 CH4 CH5

 73.70 60.93 190.62 31.38 14.78 13.77 291.34 263.17 261.14
 73.70 60.93 190.62 31.38 15.81 14.76 292.56 263.06 260.82
 73.70 60.93 190.62 31.38 17.03 16.08 295.15 263.29 260.84
 73.70 60.93 190.62 31.38 18.71 18.04 294.93 260.69 258.26
 73.70 60.93 190.62 31.38 19.10 18.62 296.43 261.21 258.31
 73.70 60.93 190.62 31.38 21.46 21.09 298.54 259.72 256.88
 73.70 60.93 190.62 31.38 24.37 24.46 301.27 257.83 255.09
 73.70 60.93 190.62 31.38 29.97 30.61 305.12 256.10 253.43
 73.70 60.93 190.62 31.38 30.36 31.00 303.18 254.43 252.13
 73.70 60.93 190.62 31.38 13.38 12.05 290.69 266.29 264.05
 73.70 60.93 190.62 31.38 13.80 12.33 293.77 266.89 264.36
 73.70 60.93 190.62 31.38 17.54 16.71 293.98 263.46 260.76
    

In addition several additional paramaters are estimated by default.

Usage

    readSAGOB(filename) 

Arguments

filename

full path and filename to read

Value

list containing two elements class and data. class contains a string with class description from the file header, while data contains a matrix with column names SuZ, SaZ, SuA, SaA, CH1, CH2, CH3, CH4, CH5, CH2/CH1, CH3-CH4, CH4-CH5, RaZ. the column names are read from the header, but these are the most common used.

Note

The ASCII collocation files are not much used anymore, but the function is kept for compability and access to old files.

Author(s)

Øystein Godøy [e-mail]

steingod/R-osisaf documentation built on May 30, 2019, 2:32 p.m.