I'm processing BUFR products from Eumetsat and I would like to ask for your help about the following descriptors:
002028 SEGMENT SIZE AT NADIR IN X DIRECTION002029 SEGMENT SIZE AT NADIR IN Y DIRECTIONMy problem is that I don't know how to interpret their values.
For example in ASR (All sky radiance) product from MSG, I have this subset in the first message of the bufr file:
:Subset 1:: 1 001007 57 SATELLITE IDENTIFIER [CODE TABLE]: 2 001031 254 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE: [CODE TABLE]: 3 002020 333 SATELLITE CLASSIFICATION [CODE TABLE]: 4 002028 48000 SEGMENT SIZE AT NADIR IN X-DIRECTION [M]: 5 002029 48000 SEGMENT SIZE AT NADIR IN Y-DIRECTION [M]: 6 004001 2015 YEAR [A]: 7 004002 2 MONTH [MON]: 8 004003 27 DAY [D]: 9 004004 20 HOUR [H]: 10 004005 45 MINUTE [MIN]: 11 004006 0 SECOND: 12 005001 23.46664 LATITUDE (HIGH ACCURACY) [DEG]: 13 006001 -59.6647 LONGITUDE (HIGH ACCURACY) [DEG]: 14 030021 3712 NUMBER OF PIXELS PER ROW [NUMERIC]: 15 030022 3712 NUMBER OF PIXELS PER COLUMN [NUMERIC]: 16 010002 missing HEIGHT [M]: 17 020082 62 AMOUNT SEGMENT CLOUD FREE [%]: 18 008012 1 LAND/SEA QUALIFIER [CODE TABLE]: 19 020082 0 AMOUNT SEGMENT CLOUD FREE [%]: 20 008012 missing LAND/SEA QUALIFIER [CODE TABLE]: 21 020081 38 CLOUD AMOUNT IN SEGMENT [%]: 22 008003 8 VERTICAL SIGNIFICANCE (SATELLITE OBSERVATIONS) :[CODE TABLE]: 23 020081 38 CLOUD AMOUNT IN SEGMENT [%]: 24 008003 9 VERTICAL SIGNIFICANCE (SATELLITE OBSERVATIONS) :[CODE TABLE]: 25 020081 0 CLOUD AMOUNT IN SEGMENT [%]As you can see, in this subset we have a single point with a LATITUDE and LONGITUDE. I interpret a subset as a description of a single segment and as above this segment has a single coordinates and a single value for a certain data type.So I get that segment = pixel. And so pixel has a dimension of 48000m x 48000m as written in the subset. Is this right? Why I read also:
: 14 030021 3712 NUMBER OF PIXELS PER ROW [NUMERIC]: 15 030022 3712 NUMBER OF PIXELS PER COLUMN [NUMERIC]If a pixel has the dimension above we can't have an image size of 3712 x 3712. Also I know that MSG has a pixel resolution of 3km x 3km and 1km x 1km not 48km x 48km.
Any ideas please?
أكثر...
002028 SEGMENT SIZE AT NADIR IN X DIRECTION002029 SEGMENT SIZE AT NADIR IN Y DIRECTIONMy problem is that I don't know how to interpret their values.
For example in ASR (All sky radiance) product from MSG, I have this subset in the first message of the bufr file:
:Subset 1:: 1 001007 57 SATELLITE IDENTIFIER [CODE TABLE]: 2 001031 254 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE: [CODE TABLE]: 3 002020 333 SATELLITE CLASSIFICATION [CODE TABLE]: 4 002028 48000 SEGMENT SIZE AT NADIR IN X-DIRECTION [M]: 5 002029 48000 SEGMENT SIZE AT NADIR IN Y-DIRECTION [M]: 6 004001 2015 YEAR [A]: 7 004002 2 MONTH [MON]: 8 004003 27 DAY [D]: 9 004004 20 HOUR [H]: 10 004005 45 MINUTE [MIN]: 11 004006 0 SECOND
: 14 030021 3712 NUMBER OF PIXELS PER ROW [NUMERIC]: 15 030022 3712 NUMBER OF PIXELS PER COLUMN [NUMERIC]If a pixel has the dimension above we can't have an image size of 3712 x 3712. Also I know that MSG has a pixel resolution of 3km x 3km and 1km x 1km not 48km x 48km.
Any ideas please?
أكثر...