Step-by-step guide
The following keys allow the user to extract a set of BUFR subsets that pertain to a time interval:
| Code Block |
|---|
extractDateTimeYearStart extractDateTimeMonthStart extractDateTimeDayStart extractDateTimeHourStart extractDateTimeMinuteStart extractDateTimeSecondStart extractDateTimeYearEnd extractDateTimeMonthEnd extractDateTimeDayEnd extractDateTimeHourEnd extractDateTimeMinuteEnd extractDateTimeSecondEnd doExtractDateTime extractedDateTimeNumberOfSubsets |
Currently the implementation of this feature is limited to compressed data. Implementation for uncompressed data will come in a future release.
To explain the use of these keys the following example using the using bufr_filter is provided, but please note that these same keys can be set using the Fortran and Python interfaces as well and no special functions have been implemented in the bufr_filter for this feature.
...
| Code Block | ||||||||
|---|---|---|---|---|---|---|---|---|
| ||||||||
transient originalNumberOfSubsets = numberOfSubsets;
set unpack=1;
transient extractDateTimeYearStart=2012;
transient extractDateTimeMonthStart=10;
transient extractDateTimeDayStart=31;
transient extractDateTimeHourStart=0;
transient extractDateTimeMinuteStart=1;
transient extractDateTimeSecondStart=31.6;
transient extractDateTimeYearEnd=2012;
transient extractDateTimeMonthEnd=10;
transient extractDateTimeDayEnd=31;
transient extractDateTimeHourEnd=0;
transient extractDateTimeMinuteEnd=1;
transient extractDateTimeSecondEnd=39.6;
set doExtractDateTime=1; # This does an implicit 'pack'
if (extractedDateTimeNumberOfSubsets != 0) {
write;
}
print "extracted [extractDateTimeNumberOfSubsetsextractedDateTimeNumberOfSubsets] of [originalNumberOfSubsets] subsets"; |
...
This example can be used on any multi-subset input file in compressed form as follows:
| Code Block |
|---|
>% bufr_filter -o out.bufr extract.filter in.bufr |
Related articles
| Content by Label | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
...