Converts Satellite ascii to GrADs binary

Converts ascii data from ESRI or TOMS data into GrADS binary format and creates the descriptio file ctl

input files:

  TOMS or ESRI  ! ascii file

From ESRI:

  no2_201801.grd   no2_201802.grd   no2_201803.grd   no2_201804.grd
  no2_201805.grd   no2_201806.grd   no2_201807.grd   no2_201808.grd   
  no2_201809.grd   no2_201810.grd   no2_201811.grd   no2_201812.grd        

From TOMS

  no2_201802.asc  no2_201803.asc  no2_201804.asc  no2_201805.asc 
  no2_201806.asc  no2_201807.asc  no2_201808.asc  no2_201809.asc
  no2_201810.asc  no2_201811.asc  no2_201812.asc  no2_201901.asc

output files:

data files on binary format and description file

From ESRI:

omi_no2_2018.dat   omi_no2_2018.ctl

From TOMS

tropomi_no2_2018.dat  tropomi_no2_2018.ctl 

ESRI format

  ncols 2880
  nrows 1440
  xllcorner -180.0
  yllcorner  -90.0
  cellsize 0.125
  nodata_value -999
  version 2.0
  -999 -999 -999 -999 -999 -999 ...

TOMS format

TROPOMI monthly-mean tropospheric NO2 columns, version 1.0
Year 2018 Month  2, units: 1e13 molecules/cm2, undef=-999
Longitudes:  2880 bins centered on 179.9375 W to 179.9375 E  (0.125 degree steps)
Latitudes :  1440 bins centered on  89.9375 S to  89.9375 N  (0.125 degree steps)
lat=  -89.9375
3   1   0   2   3   7   7   7   2  10   3   2   4   4   6   0   3   3   3   2

Namelist file

Se emplea el archivo satelite.nml para definir el formato y las variables a usar con el progama convierte.exe el formato que tiene es el siguiente:

ESRI format

!
!   Namelist file for satelite extraction data
!
&formato_ascii  ! TOMS or ESRI
ascii="ESRI"
! Numero de archivos
num_files= 12
/
&archivos
cfile="no2_201801.grd","no2_201802.grd","no2_201803.grd","no2_201804.grd","no2_201805.grd","no2_201806.grd","no2_201807.grd","no2_201808.grd","no2_201809.grd","no2_201810.grd","no2_201811.grd","no2_201812.grd",
/

TOMS format

!
!   Namelist file for satelite extraction data
!
&formato_ascii  ! TOMS or ESRI
ascii="TOMS"
! Numero de archivos
num_files= 12
/
&archivos
cfile='no2_201901.asc','no2_201802.asc','no2_201803.asc','no2_201804.asc','no2_201805.asc','no2_201806.asc','no2_201807.asc','no2_201808.asc','no2_201809.asc','no2_201810.asc','no2_201811.asc','no2_201812.asc'
/

Additional links

The ascii data can be obtained from TEMIS web site

The GrADS program can be downloaded from Grads web site