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For all the messages: extract the first non missing temperature value

Code Block
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 it is ignored)

Code Block
extract_data: on parameter_1: airTemperature parameter_rank_1: 1

Here we explicitly asked for the first temperature value. It has is a missing value in many of the messages so we have less resulting rows that in the previous example.

For all the messages: extract the first (rank=1) temperature value if it is greater than 300 K

Code Block
extract_data: on parameter_1: airTemperature parameter_rank_1: 1 parameter_operator_1: > parameter_value_1: 300

For all the messages: extract the first temperature value which is greater than 300 K

Code Block
extract_data: on parameter_1: airTemperature parameter_operator_1: > parameter_value_1: 300

For station 78016: extract all the temperature values

Code Block
identifier_value: 78016 extract_data: on parameter_1: airTemperature extract_mode: all

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