AtmData

class pyarts3.arts.AtmData(*args, **kwargs)

An atmospheric data field.

Each atmospheric data field can be mapped to a single altitude-latitude-longitude coordinate, producing a Numeric value at that point in the atmosphere.

It holds essentially two things:

Rules for how to extrapolate the data in the six directions of the atmosphere (up, down, north, south, east, west).
A data field. This data field is one of the following types:
1. Numeric - The data field is constant in the atmosphere. Cannot consider the extrapolation rules as there is no grid.
2. GeodeticField3 - The grids are altitude, latitude, longitude. Will consider the extrapolation rules but otherwise performs linear interpolation between all points. With the additional rule that longitude is considerd cyclic around [-180, 180).
3. NumericTernaryOperator - The data field has functional form. Cannot consider the extrapolation rules as there is no grid.

Overview

Method	`readxml()`	Read variable from file.
Method	`regrid()`	Regrid the data to a new grid.
Method	`savexml()`	Saves variable to file.
Method	`set_extrapolation()`	Set the extrapolation for all dimensions
Method	`ws()`	Get the weights of neighbors at a position
Static Method	`fromxml()`	Create variable from file.
`InterpolationExtrapolation`	`alt_low`	Lower altitude limit
`InterpolationExtrapolation`	`alt_upp`	Upper altitude limit
`GeodeticField3` or `Numeric` or `NumericTernaryOperator`	`data`	The data.
`String`	`data_type`	The data type
`InterpolationExtrapolation`	`lat_low`	Lower latitude limit
`InterpolationExtrapolation`	`lat_upp`	Upper latitude limit
`InterpolationExtrapolation`	`lon_low`	Lower longitude limit
`InterpolationExtrapolation`	`lon_upp`	Upper longitude limit
Operator	`__call__()`	Get a point of data at the position
Operator	`__eq__()`	Return self==value.
Operator	`__format__()`	__format__(self, arg: str, /) -> str
Operator	`__ge__()`	Return self>=value.
Operator	`__getstate__()`	__getstate__(self) -> tuple[pyarts3.arts.GeodeticField3 \| float \| pyarts3.arts.NumericTernaryOperator, pyarts3.arts.InterpolationExtrapolation, pyarts3.arts.InterpolationExtrapolation, pyarts3.arts.InterpolationExtrapolation, pyarts3.arts.InterpolationExtrapolation, pyarts3.arts.InterpolationExtrapolation, pyarts3.arts.InterpolationExtrapolation]
Operator	`__gt__()`	Return self>value.
Operator	`__hash__()`	Return hash(self).
Operator	`__init__()`	Overloaded function.
Operator	`__le__()`	Return self<=value.
Operator	`__lt__()`	Return self<value.
Operator	`__ne__()`	Return self!=value.
Operator	`__repr__()`	__repr__(self) -> str
Operator	`__setstate__()`	__setstate__(self, arg: tuple[pyarts3.arts.GeodeticField3 \| float \| pyarts3.arts.NumericTernaryOperator, pyarts3.arts.InterpolationExtrapolation, pyarts3.arts.InterpolationExtrapolation, pyarts3.arts.InterpolationExtrapolation, pyarts3.arts.InterpolationExtrapolation, pyarts3.arts.InterpolationExtrapolation, pyarts3.arts.InterpolationExtrapolation], /) -> None
Operator	`__str__()`	__str__(self) -> str

Constructors

__init__(self) → None

__init__(self, arg: pyarts3.arts.AtmData) → None

__init__(self, arg: pyarts3.arts.GeodeticField3, /) → None

__init__(self, arg: float, /) → None

__init__(self, arg: pyarts3.arts.NumericTernaryOperator, /) → None

__init__(self, arg: pyarts3.arts.GeodeticField3, /) → None

__init__(self, v: pyarts3.arts.GriddedField3) → None

__init__(self, v: pyarts3.arts.SortedGriddedField3) → None

Overloaded function.

__init__(self) -> None
__init__(self, arg: pyarts3.arts.AtmData) -> None
__init__(self, arg: pyarts3.arts.GeodeticField3, /) -> None
__init__(self, arg: float, /) -> None
__init__(self, arg: pyarts3.arts.NumericTernaryOperator, /) -> None
__init__(self, arg: pyarts3.arts.GeodeticField3, /) -> None
__init__(self, v: pyarts3.arts.GriddedField3) -> None

Initialize with a gridded field

__init__(self, v: pyarts3.arts.SortedGriddedField3) -> None

Initialize with a gridded field

Methods

readxml(self, file: str) → str

Read variable from file.

Parameters:: file (str) – A file that can be read.
Raises:: RuntimeError – For any failure to read.
Returns:: file – The file path found (may differ from input due to environment variables).
Return type:: str

regrid(self, alt: pyarts3.arts.AscendingGrid, lat: pyarts3.arts.LatGrid, lon: pyarts3.arts.LonGrid, extrapolation: pyarts3.arts.InterpolationExtrapolation = 'Nearest') → None

Regrid the data to a new grid.

This will convert the data to a GeodeticField3 if it is not already. It will not respect the existing extrapolation settings, so these must be set manually after calling this method.

Parameters:

alt (AscendingGrid) – The new altitude grid.
lat (LatGrid) – The new latitude grid.
lon (LonGrid) – The new longitude grid.
extrapolation (InterpolationExtrapolation) – The extrapolation method to use. Defaults to Nearest

savexml(self, file: str, type: str = 'ascii', clobber: bool = True) → str

Saves variable to file.

Parameters:

file (str) – The path to which the file is written. Note that several of the options might modify the name or write more files.
type (str, optional) – Type of file to save. See FileType for options. Defaults is “ascii”.
clobber (bool, optional) – Overwrite existing files or add new file with modified name? Defaults is True.

Raises: