These examples show how to extract data in a table format from BUFR files.
These conditions are combined together by the logical AND operator. So a row of data is only added to the results when all the conditions match.
Extracting a single parameter
| Description | Filter | Results | Comments |
|---|---|---|---|
For all the messages: extract the first non missing temperature value | extract_data: on parameter_1: airTemperature |
| By default missing values are ignored in data extraction (see option MISSING DATA) |
| For all the messages: extract the first (rank=1) temperature value (if missing ignored) | extract_data: on parameter_1: airTemperature parameter_rank_1: 1 |
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| For all the messages: extract the first (rank=1) temperature value if it is greater than 300 K | extract_data: on parameter_1: airTemperature parameter_rank_1: 1 parameter_operator_1: > parameter_value_1: 300 |
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| For all the messages: extract the first temperature value which is greater than 300 K | extract_data: on parameter_1: airTemperature parameter_operator_1: > parameter_value_1: 300 |
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For station 78016: extract all the temperature values | extract_data: on parameter_1: airTemperature extract_mode: all |
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Single coordinate condition
| Description | Filter | Results |
|---|---|---|
For all messages: extract the first temperature value which is greater than 300 K and also extract the pressure on which it occurs | extract_data: on parameter_1: airTemperature parameter_operator_1: > parameter_value_1: 300 coordinate_condition_count: 1 coordinate_1: pressure |
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| For all messages: extract the first temperature value which is greater than 300 K and the pressure is less than 950 hPa | extract_data: on parameter_1: airTemperature parameter_operator_1: > parameter_value_1: 300 coordinate_condition_count: 1 coordinate_1: pressure coordinate_operator_1: > coordinate_value_1: 95000 |
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| For all messages: extract the (first) temperature value on the 500 hPa pressure level | extract_data: on parameter_1: airTemperature coordinate_condition_count: 1 coordinate_1: pressure coordinate_operator_1: = coordinate_value_1: 50000 |
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For station 78016: extract the temperature on the second pressure level | identifier_value: 78016 extract_data: on parameter_1: airTemperature coordinate_condition_count: 1 coordinate_1: pressure coordinate_rank_1: 2 |
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| For station 78016: extract the temperature on the first 6 pressure levels | identifier_value: 78016 extract_data: on parameter_1: airTemperature coordinate_condition_count: 1 coordinate_1: pressure coordinate_rank_1: 1/2/3/4/5/6 |
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| For station 78016: extract the temperature on the 925, 850 and 700 hPa pressure levels | identifier_value: 78016 extract_data: on parameter_1: airTemperature coordinate_condition_count: 1 coordinate_1: pressure coordinate_operator_1: = coordinate_value_1: 92500/85000/70000 |
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Multiple parameters
| Description | Filter | Results |
|---|---|---|
For all the messages: extract the first wind speed and wind direction values | extract_data: on parameter_1: windDirection parameter_2: windSpeed |
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| For all the messages: extract the first wind speed and wind direction values and also extract their pressure | extract_data: on parameter_1: windDirection parameter_2: windSpeed coordinate_condition_count: 1 coordinate_1: pressure |
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| For all the messages: extract wind speed and wind direction values on the 500 hPa pressure level | extract_data: on parameter_1: windDirection parameter_2: windSpeed coordinate_condition_count: 1 coordinate_1: pressure coordinate_operator_1: = coordinate_value_1: 50000 |
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Multiple (nested) coordinate conditions
| Task | Filter | Results |
|---|---|---|
For station 78016: extract all the temperature values on standard pressure levels | identifier_value: 78016 extract_data: on parameter_1: airTemperature coordinate_condition_count: 2 coordinate_1: pressure coordinate_2: verticalSoundingSignificance coordinate_operator_2: = coordinate_value_2: 32 |
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| For station 78016: extract all the temperature values on temperature significant levels where the pressure is less than 500 hPa | identifier_value: 78016 extract_data: on parameter_count: 1 parameter_1: airTemperature coordinate_condition_count: 2 coordinate_1: pressure coordinate_operator_1: < coordinate_value_1: 50000 coordinate_2: verticalSoundingSignificance coordinate_operator_2: = coordinate_value_2: 4/68 |
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