da.smooth.df

These are the constants multiplied with the un-smoothed values. during filter calculation. The more recent ones are first (leftmost) in the list. For example the multiplier on the value being smoothed is the first value on the left.

Default: 1.0

This option requires at least one number if it is used.

These are the constants multiplied with the smoothed values. during filter calculation. The more recent ones are first (leftmost) in the list. For example the multiplier on the previous output is the first value on the left.

This option may also be set to an empty value to indicate an empty list of numbers.

If two values are seperated by this much time then the smoother is reset. That is, data separated by this much will be smoothed as independent runs of data.

Default: Infinite

Undefined intervals are accepted. The interval must be greater than or equal to zero length.

If this option is set undefined values are ignored instead of forcing a smoother reset.

Default: Disabled, undefined values cause a reset

This argument is used to specify the station used to look up variables that do not include a station as part of an archive read specification. The station is the three letter GAW station code of the location, such as BND. The argument accepts multiple stations specified as regular expressions and separated by : or ; or ,. For example BND,MLO and (BND|MLO) are two ways of selecting both the BND and MLO stations.

The special value allstations may also be specified to select all stations.

This argument may be split into multiple actual program arguments. Each part consists of one or more variable specifications separated by , (commas). The station and archive used if none are explicitly given are defined in the other arguments or inferred from system defaults. For example simply BsB_S11 selects the blue scattering from the S11 instrument and returns all cut sizes and metadata. If instead ::BsB_S11:pm10 is used then only PM10 scattering is returned. That is, the selection specifies "any" station and archive (the defaults are set in the other arguments) then requires that it has the "PM10" flavor. A specification such as bnd:BsB_S11,thd:BsB_S11 allows for data selection from multiple stations.

This may also be used to select a "record" type alias such as "S11a". In this mode all the variables defined in the alias are returned.

Finally the special value everything can be used to select all available data for the given station(s) and archive(s).

This argument may be split into multiple actual program arguments. This full list of time arguments defines a time bounds list that sets the range of data queried. The final resulting data are clipped to the given time bounds but any values that intersect them are returned.

This argument is used to specify the archive used to look up variables that do not include an archive as part of an archive read specification. The archive is the internal name, such as raw or clean_meta. The argument accepts multiple archives specified as regular expressions and separated by : or ; or ,. For example raw(_meta)? selects both the raw and raw_meta archives.

The special value allarchives may also be used to select all available archives.

This argument is used to specify the the file to read data from. If it is present and exists then data is read from the given file name instead of from standard input. Alternatively - (a single dash) may be used to explicitly specify standard input.

This filter specifies a single pole low pass configuration with a time constant of five data points. This will smooth all input data over any gap length but will reset on undefined values.