It's time to do some practice. Here is an example of how to use cookie-cutter
Before going on, you should have built and configured the package.
1) Look for an EUMETSAT archive directory (with compressed files). It should contain files like these:
[user@hostname EUMETSAT-ARCHIVE]$ ls [...] /path/to/seviri_data/H-000-MSG1__-MSG1________-_________-PRO______-200506011200-C_ /path/to/seviri_data/H-000-MSG1__-MSG1________-IR_016___-000001___-200506011200-C_ /path/to/seviri_data/H-000-MSG1__-MSG1________-IR_016___-000002___-200506011200-C_ /path/to/seviri_data/H-000-MSG1__-MSG1________-IR_016___-000003___-200506011200-C_ /path/to/seviri_data/H-000-MSG1__-MSG1________-IR_016___-000004___-200506011200-C_ /path/to/seviri_data/H-000-MSG1__-MSG1________-IR_016___-000005___-200506011200-C_ /path/to/seviri_data/H-000-MSG1__-MSG1________-IR_016___-000006___-200506011200-C_ /path/to/seviri_data/H-000-MSG1__-MSG1________-IR_016___-000007___-200506011200-C_ /path/to/seviri_data/H-000-MSG1__-MSG1________-IR_016___-000008___-200506011200-C_ /path/to/seviri_data/H-000-MSG1__-MSG1________-_________-EPI______-200506011200-C_ [...]
2) catslot one day of the directory content into another directory (see appendix A for a brief description of the command catslot and the SATMOS archive format):
[user@hostname cookie-cutter]$ catslot EUMETSAT-ARCHIVE SATMOS-20050601 20050601 [user@hostname cookie-cutter]$ cd SATMOS-20050601 [user@hostname SATMOS-20050601]$ ls H-000-MSG1__-MSG1________-IR016____-CYCLE____-200506010000 H-000-MSG1__-MSG1________-IR016____-CYCLE____-200506010015 H-000-MSG1__-MSG1________-IR016____-CYCLE____-200506010030 H-000-MSG1__-MSG1________-IR016____-CYCLE____-200506010045 H-000-MSG1__-MSG1________-IR016____-CYCLE____-200506010100 H-000-MSG1__-MSG1________-IR016____-CYCLE____-200506010115 H-000-MSG1__-MSG1________-IR016____-CYCLE____-200506010130 H-000-MSG1__-MSG1________-IR016____-CYCLE____-200506010145 H-000-MSG1__-MSG1________-IR016____-CYCLE____-200506010200 [...]Of course, the previous steps are in no way necessary if your MSG data were provided by the SATMOS archive center.
3) get (or produce) a text file containing node times and longitudes for this day. We'll call it nodes_20050601.txt:
2005-06-01 01:07:50 184.1 2005-06-01 02:46:43 159.38 2005-06-01 04:25:36 134.66 2005-06-01 06:04:29 109.94 2005-06-01 07:43:23 85.22 2005-06-01 09:22:16 60.5 2005-06-01 11:01:09 35.78 2005-06-01 12:40:02 11.06 2005-06-01 14:18:55 346.34 2005-06-01 15:57:48 321.62 2005-06-01 17:36:41 296.9 2005-06-01 19:15:34 272.18 2005-06-01 20:54:27 247.46 2005-06-01 22:33:20 222.74
4) Find the following orbital parameters of the chosen sun-synchronous orbit: inclination (we'll take 98.2° in this example) and orbital period (we'll take 98.88 minutes).
5) Choose a width of extraction (in degrees of longitude at the equator). We'll take 10°.
6) Run the command:
[user@hostname cookie-cutter]$ cookie-cutter -i 98.2 -T 98.88 -w 10 \ nodes_20050601.txt SATMOS-20050601 output_file
The last argument is the name of the file which will be created by cookie-cutter. In fact, two files will be produced: output_file.hdf and output_file.ppm. The first one is a standard HDF file and the other one is an image in ppm format.