curryer.kernels.ephemeris

ephemeris

@author: Brandon Stone

Attributes

logger
PROPERTIES_TO_WRITER

Classes

EphemerisTypes	Ephemeris kernel types.
EphemerisInputDataTypes	Ephemeris input data types.
EphemerisWriterTimeTypes	Ephemeris writer time types.
AbstractEphemerisProperties	Ephemeris kernel common properties.
EphemerisStateProperties	Ephemeris state kernel properties.
EphemerisTLEProperties	Ephemeris state kernel properties.
AbstractEphemerisWriter	Create or append to a SPICE ephemeris (SPK) kernel.
EphemerisStateWriter	Create or append to a SPICE ephemeris (SPK) kernel using table-like input
EphemerisTLEWriter	Create or append to a SPICE ephemeris (SPK) kernel using TLE.

Module Contents

curryer.kernels.ephemeris.logger

class curryer.kernels.ephemeris.EphemerisTypes(*args, **kwds)

Bases: enum.Enum

Ephemeris kernel types.

INTERP_LAGRANGE_EVEN = 8

INTERP_LAGRANGE_UNEVEN = 9

INTERP_HERMITE_EVEN = 12

INTERP_HERMITE_UNEVEN = 13

TLE = 10

class curryer.kernels.ephemeris.EphemerisInputDataTypes(*args, **kwds)

Bases: enum.Enum

Ephemeris input data types.

STATES = 'STATES'

TLE_ELEMENTS = 'TL_ELEMENTS'

class curryer.kernels.ephemeris.EphemerisWriterTimeTypes(*args, **kwds)

Bases: enum.Enum

Ephemeris writer time types.

UTC = 'UTC'

ET = 'ETSECONDS'

class curryer.kernels.ephemeris.AbstractEphemerisProperties

Bases: curryer.kernels.classes.AbstractKernelProperties

Ephemeris kernel common properties.

SUPPORTED_INPUT_DATA_TYPES: ClassVar = None

input_data_type: str = None

input_center: str = None

input_frame: str = None

spk_type: str = None

leapsecond_kernel: str = None

planet_kernels: list[str] = None

__post_init__()

to_dict()

Convert the properties class to a dict for creating kernels.

class curryer.kernels.ephemeris.EphemerisStateProperties

Bases: AbstractEphemerisProperties

Ephemeris state kernel properties.

SUPPORTED_INPUT_DATA_TYPES: ClassVar

input_body: str = None

input_data_type: str = 'STATES'

input_data_units: dict[str, str]

input_time_type: str = 'ugps'

input_time_columns: list[str] = ['ugps']

input_data_columns: list[str] = ['position_x', 'position_y', 'position_z', 'velocity_x', 'velocity_y', 'velocity_z']

spk_type: str = 'INTERP_HERMITE_UNEVEN'

polynom_degree: int = 3

frame_kernel: str = None

writer_ignore_lines: int = 1

writer_lines_per_record: int = 1

writer_data_delimiter: str = ','

writer_data_order: str = 'epoch x y z vx vy vz'

writer_time_type: str = 'UTC'

__post_init__()

to_dict()

Convert the properties class to a dict for creating kernels.

class curryer.kernels.ephemeris.EphemerisTLEProperties

Bases: AbstractEphemerisProperties

Ephemeris state kernel properties.

SUPPORTED_INPUT_DATA_TYPES: ClassVar

input_tle: int = None

input_body: str = None

input_data_type: str = 'TLE_ELEMENTS'

spk_type: str = 'TLE'

tle_start_pad: str = '12 hours'

tle_stop_pad: str = '12 hours'

to_dict()

Convert the properties class to a dict for creating kernels.

class curryer.kernels.ephemeris.AbstractEphemerisWriter(properties: AbstractKernelProperties, bin_dir: str = None, parent_dir: str = None)

Bases: curryer.kernels.classes.AbstractKernelWriter

Create or append to a SPICE ephemeris (SPK) kernel.

Notes

Kernel configuration arguments set by this class:

• LEAPSECONDS_FILE : __init__, accessor.properties.spice.kernels

• PCK_FILE : __init__, accessor.properties.spice.kernels

KTYPE = 'spk'

FILE_EXT = '.bsp'

abstractmethod prepare_input_data(input_data: pandas.DataFrame) → list[pandas.DataFrame]

Prepare an accessor that will provide input data for the kernel.

abstractmethod write_input_data(fobj_or_str, accessor)

Write input data.

_write_kernel(setup_file, input_file, kernel_file, append=False)

Setup the command to create an “SPK” kernel using the external tool “mkspk”.

Parameters:

• setup_file (str) – Setup file containing kernel creation properties (see “mkspk”).

• input_file (str) – Input data file to create kernel from.

• kernel_file (str) – Kernel filename to create.

• append (bool, optional) – Append data to an existing kernel (if exists). Default=False

Returns:

List of subprocess commands and arguments.

Return type:

list of str

class curryer.kernels.ephemeris.EphemerisStateWriter(properties: EphemerisStateProperties, **kwargs)

Bases: AbstractEphemerisWriter

Create or append to a SPICE ephemeris (SPK) kernel using table-like input data sets (e.g. database or CSV file).

Notes

Kernel configuration arguments set by this class:

• OBJECT_NAME : __init__, accessor.properties.spice.name # TODO: Update

• LEAPSECONDS_FILE : __init__, accessor.properties.spice.kernels

• PCK_FILE : __init__, accessor.properties.spice.kernels

• IGNORE_FIRST_LINE : __init__

• LINES_PER_RECORD : __init__

• DATA_DELIMITER : __init__

• DATA_ORDER : prepare_input, time position velocity

• TIME_WRAPPER : prepare_input, UTC string

properties

prepare_input_data(input_data: pandas.DataFrame) → list[pandas.DataFrame]

Prepare an accessor that will provide input data for the kernel.

write_input_data(fobj_or_str, input_data: pandas.DataFrame)

Write input data.

class curryer.kernels.ephemeris.EphemerisTLEWriter(properties: EphemerisTLEProperties, **kwargs)

Bases: AbstractEphemerisWriter

Create or append to a SPICE ephemeris (SPK) kernel using TLE.

Notes

Kernel configuration arguments set by this class:

• LEAPSECONDS_FILE : __init__, accessor.properties.spice.kernels

• PCK_FILE : __init__, accessor.properties.spice.kernels

properties

prepare_input_data(input_data: pandas.DataFrame) → list[pandas.DataFrame]

Prepare an accessor that will provide input data for the kernel.

write_input_data(fobj_or_str, input_data: pandas.DataFrame)

Write input data.

curryer.kernels.ephemeris.PROPERTIES_TO_WRITER