ska_tmc_cspsubarrayleafnode.delay_model package

Submodules

ska_tmc_cspsubarrayleafnode.delay_model module

DelayManager class for delay calculation in SKA Mid and SKA Low.

class ska_tmc_cspsubarrayleafnode.delay_model.AntennaParams

Bases: object

Antenna parameters class.

class ska_tmc_cspsubarrayleafnode.delay_model.DelayManager(csp_sln_cm: CspSLNComponentManager, telmodel_source: str, telmodel_path: str, delay_model_time_in_advance: int, delay_cadence: int, logger: logging.Logger | None)

Bases: object

The class that includes common methods required for delay calculation in SKA Mid and SKA Low.

calculate_delay_model() → None

Calculates the delay model using KatPoint library.

Raises:

NotImplementedError – If the method is not implemented by the respective delay manager class.

clear_next_polynomial_time()

This method resets the value of next polynomial time after configure command End or Aborted

create_antenna_objects(antenna_params: AntennaParams) → NotImplementedError

Creates KatPoint Antenna objects from antenna parameters.

Parameters:

antenna_params (dict) – Dictionary containing antenna parameters.

Raises:

NotImplementedError – If the method is not implemented by the respective delay manager class.

delay_model_handler(delay_cadence: int)

Handles the periodic calculation of the delay model.

Parameters:

argin (int) – Delay model update interval in seconds.

fetch_antenna_params() → Tuple[dict[Any, Any], str]

Fetch antenna params from telmodel.

fetch_data() → dict[Any, Any]

Method to retry using python retry library at frequency of 1 sec. This also logs a warning message with the error faced while trying.

set_dummy_targets() → Tuple[ska_tango_base.commands.ResultCode, str]

Sets dummy targets for delay calculation.

Raises:

NotImplementedError – If the method is not implemented by the respective delay manager class.

start() → None

Starts the delay model calculator thread.

stop() → None

Stops the delay model calculator thread.

update_config_params() → Tuple[ska_tango_base.commands.ResultCode, str]

Updates configuration parameters related to assigned resources during assign, release, or configure commands execution.

Raises:

NotImplementedError – If the method is not implemented by the respective delay manager class.

class ska_tmc_cspsubarrayleafnode.delay_model.Location

Bases: object

Location class for storing geodetic coordinates.

ska_tmc_cspsubarrayleafnode.delay_model.get_antenna_params(antenna_params: dict[str, Any])

Returns AntennaParams object from provided antenna parameters.

Parameters:

antenna_params – Dictionary containing antenna parameters.

Returns:

AntennaParams object.

ska_tmc_cspsubarrayleafnode.delay_model_mid module

DelayManagerMid class

class ska_tmc_cspsubarrayleafnode.delay_model_mid.DelayManagerMid(csp_sln_cm, telmodel_source: str, telmodel_path: str, delay_model_time_in_advance: int, delay_cadence: float, delay_validity_period: float, logger)

Bases: DelayManager

A class that calculates geometric delays for SKA Mid

calculate_delay_model()

Calculate delays using KatPoint library.

Returns:

None

calculate_geometric_delays(time_t0, antenna_names)

Calculate geometric delay values using KATPoint library.

Parameters:

• time_t0 – reference time for delay calculation

• antenna_names – list of antenna names

Returns:

Dictionary containing fifth order polynomial coefficients per antenna per fsp

create_antenna_objects(antenna_params)

Creates KatPoint Antenna objects from antenna parameters.

Parameters:

antenna_params (dict) – Dictionary containing antenna parameters.

Returns:

List of KatPoint Antenna objects.

Return type:

list

set_dummy_targets()

Set dummy targets for mid.

Returns:

Tuple[ResultCode, str]: result code and message

update_config_params()

Update configuration parameters related to assigned resources during assign, release, or configure commands execution.

Returns:

(ResultCode, Message)

ska_tmc_cspsubarrayleafnode.delay_model_low module

DelayManagerLow class

class ska_tmc_cspsubarrayleafnode.delay_model_low.DelayManagerLow(csp_sln_cm: CspSLNComponentManager, telmodel_source: str, telmodel_path: str, delay_model_time_in_advance: int, delay_cadence: int, delay_validity_period: float, logger: Logger)

Bases: DelayManager

A class that calculates geometric delays for SKA Low

calculate_delay_model() → None

Calculate delays using the KatPoint library and update the delay model JSON.

calculate_geometric_delays(time_t0: datetime, antenna_names: list[str]) → dict[str, Any]

Calculate geometric delay values using the KATPoint library.

Parameters:

• time_t0 – Initial time for delay calculation

• antenna_names – List of antenna names

Returns:

Dictionary containing fifth order polynomial coefficients per antenna

create_antenna_objects(antenna_params: dict[str, Any]) → list[katpoint.Antenna]

Creates KatPoint Antenna objects from antenna parameters.

Parameters:

antenna_params (dict) – Dictionary containing antenna parameters.

Returns:

List of KatPoint Antenna objects.

Return type:

list

set_dummy_targets() → tuple[ska_tango_base.commands.ResultCode, str]

Set dummy targets for the delay correction object.

Returns:

Tuple of ResultCode and message string

update_config_params() → tuple[ska_tango_base.commands.ResultCode, str]

Update configuration parameters related to the resources assigned.

This method updates parameters every time assign, release, or configure commands are executed.

Returns:

Tuple of ResultCode and message string

ska_tmc_cspsubarrayleafnode.delay_model_pst_beam module

DelayManager class for PST beam calculation.

class ska_tmc_cspsubarrayleafnode.delay_model_pst_beam.DelayManagerPSTBeam(csp_sln_cm, telmodel_source: str, telmodel_path: str, pst_delay_model_time_in_advance: int, pst_delay_cadence: int, pst_delay_validity_period: int, pst_beam_id: int, ra: float, dec: float, logger)

Bases: DelayManagerLow

A class that calculates geometric delays for PST Beams for SKA Low

calculate_delay_model()

Calculate delays using the KatPoint library and update the delay model PST Beam JSON.

calculate_geometric_delays(time_t0, antenna_names)

Calculate geometric delay values using the KATPoint library.

Parameters:

• time_t0 – Initial time for delay calculation

• antenna_names – List of antenna names

Returns:

Dictionary containing fifth order polynomial coefficients per antenna

delay_model_handler(delay_cadence)

Handles the periodic calculation of the delay model for PST Beams.

Parameters:

argin (int) – Delay model update interval in seconds.