[ferret_users] reading TOMS ascii data and rigriding it

[Yogesh Tiwari <yogesh.mpi@xxxxxxxxxxxxxx>]

Hello Ferret Users,

 

I have two data sets i) TOMS aerosol optical depth and ii) TOMS ozone.

 

AOD data is on 1x1 grid and O3 data is on 5x5 grid.

 

First I want to read AOD and O3 and then I want to regrid AOD on 5x5 grid.

 

Reading is first problem.

 

AOD data is in following format:

 

#########

Latitute: 89.5

167 0 0 0 0 0 182 0 0 0 0 0 0 0 0 0 0 0 0 200 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 155 0 0 0 0 0 156  0 0 0 0 0 0
............

...........

 

Latitude: 88.5

.........

........

 

Lat.........

.........

.......

......

Latitude: -88.5

180 0 0 0 0 0 182 0 0 0 0 0 0 0 0 0 0 0 0 500 0 0 0 0 0 0

0 0 0 0 0 0 0 0 0 0 0 0 0 0 655 0 0 0 0 0 156  0 0 0 0 0 0

......

.....
######

 

After each latitude header there is 360 AOD values (1x1 grid). This is monthly mean data. I have many years of data file.

 

So the first problem is how to read the data by omiting latitude header ?

And second, how to regrid the above AOD data on 5x5 grid. Currently it is on 1x1 grid ?

 

Ozone data as well has the similar header (Month index: 0 , Month index: 1........).

 

Many thanks for yours help.

 

--
Dr. Yogesh K. Tiwari,
Scientist 'B',
Indian Institute of Tropical Meteorology,
Homi Bhabha Road,
Pashan,
Pune-411008
INDIA

Phone: 0091-99 2273 9513 (Cell)
         : 0091-20-258 93 600 (O) ( Ext.250)
Fax    : 0091-20-258 93 825