LatissWEPAlign¶

class lsst.ts.externalscripts.auxtel.LatissWEPAlign(index: int = 1, remotes: bool = True)¶

Bases: LatissBaseAlign

Perform an optical alignment procedure of Auxiliary Telescope with the LATISS instrument.

Instead of using the Curvature Wavefront Sensing package directly (e.g. https://github.com/lsst-ts/cwfs like LatissCWFSAlign) this script uses the wavefront estimation pipeline task, which is the same code we will use for the Main Telescope.

Parameters:

indexint: Index of Script SAL component.

Attributes Summary

`checkpoints`	Get the checkpoints at which to pause and stop.
`domain`
`dz`
`group_id`	Get the group ID (a `str`), or "" if not set.
`side`
`state`	Get the current state.
`state_name`	Get the name of the current `state`.state.

Methods Summary

`additional_configuration`(config)	Additional configuration.
`amain`(**kwargs)	Run the script from the command line.
`arun`([checkpoint])	Perform CWFS measurements and hexapod adjustments until the thresholds are reached.
`assert_feasibility`()	Verify that the telescope and camera are in a feasible state to execute the script.
`assert_state`(action, states)	Assert that the current state is in `states` and the script is not exiting.
`calculate_results`()	Calculates hexapod and telescope offsets based on derotated zernikes.
`checkpoint`([name])	Await this at any "nice" point your script can be paused or stopped.
`cleanup`()	Perform final cleanup, if any.
`close`([exception, cancel_start])	Shut down, clean up resources and set done_task done.
`close_tasks`()	Shut down pending tasks.
`configure`(config)	Configure script.
`do_configure`(data)	Configure the currently loaded script.
`do_resume`(data)	Resume the currently paused script.
`do_run`(data)	Run the script and quit.
`do_setAuthList`(data)	Update the authorization list.
`do_setCheckpoints`(data)	Set or clear the checkpoints at which to pause and stop.
`do_setGroupId`(data)	Set or clear the group_id attribute.
`do_setLogLevel`(data)	Set logging level.
`do_stop`(data)	Stop the script.
`get_schema`()	Return a jsonschema to validate configuration, as a `dict`.
`make_from_cmd_line`(**kwargs)	Make a script from command-line arguments.
`next_supplemented_group_id`()	Return the group ID supplemented with a new subgroup.
`put_log_level`()	Output the logLevel event.
`run`()	Execute script.
`run_align`()	Runs wavefront estimation pipeline.
`set_metadata`(metadata)	Sets script metadata.
`set_state`([state, reason, keep_old_reason, ...])	Set the script state.
`start`()	Finish construction.
`start_phase2`()	Additional work after `start` before fully started.
`take_intra_extra`()	Take pair of Intra/Extra focal images to be used to determine the measured wavefront error.

Attributes Documentation

checkpoints¶

Get the checkpoints at which to pause and stop.

Returns self.evt_checkpoints.data which has these fields:

pause: checkpoints at which to pause, a regular expression
stop: checkpoints at which to stop, a regular expression

domain¶

dz¶

group_id¶: Get the group ID (a str), or “” if not set.

side¶

state¶

Get the current state.

Returns self.evt_state.data, which has these fields:

state: lsst.ts.idl.enums.Script.ScriptState
The current state.
lastCheckpoint: str
Name of most recently seen checkpoint.
reason: str
Reason for this state, if any.
numCheckpoints: int
The number of checkpoints seen.

state_name¶: Get the name of the current state.state.

Methods Documentation

async additional_configuration(config: SimpleNamespace) → None¶

Additional configuration.

This method is intended to be overridden by subclasses to add additional configuration.

async classmethod amain(**kwargs: Any) → None¶

Run the script from the command line.

Parameters:

kwargs: Keyword arguments for the script constructor. Must not include index. Ignored (other than testing for index) if the command specifies --schema.

Raises:

RuntimeError: If kwargs includes index.

Notes

The final return code will be:

0 if final state is lsst.ts.idl.enums.Script.ScriptState.DONE or lsst.ts.idl.enums.Script.ScriptState.STOPPED.
1 if final state is anything else, or if script.done_task is an exception (which would be raised by the script’s cleanup code).

Issues a RuntimeWarning if script.done_task is an exception and the final script state is anything other than Failed. This should never happen.

async arun(checkpoint: bool = False) → None¶

Perform CWFS measurements and hexapod adjustments until the thresholds are reached.

Parameters:

checkpointbool, optional: Should issue checkpoints (default=False)?

Raises:

RuntimeError:: If coordinates are malformed.

async assert_feasibility() → None¶: Verify that the telescope and camera are in a feasible state to execute the script.

assert_state(action: str, states: Sequence[ScriptState]) → None¶

Assert that the current state is in states and the script is not exiting.

Parameters:

actionstr: Description of what you want to do.
stateslist [lsst.ts.idl.enums.Script.ScriptState]: Allowed states.

calculate_results() → LatissAlignResults¶

Calculates hexapod and telescope offsets based on derotated zernikes.

Returns:

resultsLatissAlignResults: Results of the wavefront sensing.

async checkpoint(name: str = '') → None¶

Await this at any “nice” point your script can be paused or stopped.

Parameters:

namestr, optional: Name of checkpoint; “” if it has no name.

Raises:

RuntimeError: If the state is not ScriptState.RUNNING. This likely means you called checkpoint from somewhere other than run.
RuntimeError: If _run_task is None or done. This probably means your code incorrectly set the state.

async cleanup()¶

Perform final cleanup, if any.

This method is called as the script state is exiting, unless the script had not yet started to run, or the script process is aborted by SIGTERM or SIGKILL.

async close(exception: Exception | None = None, cancel_start: bool = True) → None¶

Shut down, clean up resources and set done_task done.

May be called multiple times. The first call closes the Controller; subsequent calls wait until the Controller is closed.

Subclasses should override close_tasks instead of close, unless you have a good reason to do otherwise.

Parameters:

exceptionException, optional: The exception that caused stopping, if any, in which case the self.done_task exception is set to this value. Specify None for a normal exit, in which case the self.done_task result is set to None.
cancel_startbool, optional: Cancel the start task? Leave this true unless calling this from the start task.

Notes

Removes the SAL log handler, calls close_tasks to stop all background tasks, pauses briefly to allow final SAL messages to be sent, then closes the dds domain.

async close_tasks() → None¶

Shut down pending tasks. Called by close.

Perform all cleanup other than disabling logging to SAL and closing the dds domain.

async configure(config: SimpleNamespace) → None¶

Configure script.

Parameters:

configtypes.SimpleNamespace: Script configuration, as defined by schema.

Raises:

RuntimeError:: If both find_target and track_target are defined in the configuration.

async do_configure(data: BaseMsgType) → None¶

Configure the currently loaded script.

Parameters:

datacmd_configure.DataType: Configuration.

Raises:

base.ExpectedError: If self.state.state is not lsst.ts.idl.enums.Script.ScriptState.UNCONFIGURED.

Notes

This method does the following:

Parse the config field as yaml-encoded dict and validate it (including setting default values).
Call configure.
Set the pause and stop checkpoints.
Set the log level if data.logLevel != 0.
Call set_metadata.
Output the metadata event.
Change the script state to lsst.ts.idl.enums.Script.ScriptState.CONFIGURED.

async do_resume(data: BaseMsgType) → None¶

Resume the currently paused script.

Parameters:

datacmd_resume.DataType: Ignored.

Raises:

base.ExpectedError: If self.state.state is not lsst.ts.idl.enums.Script.ScriptState.PAUSED.

async do_run(data: BaseMsgType) → None¶

Run the script and quit.

The script must have been configured and the group ID set.

Parameters:

datacmd_run.DataType: Ignored.

Raises:

base.ExpectedError: If self.state.state is not lsst.ts.idl.enums.Script.ScriptState.CONFIGURED. If self.group_id is blank.

async do_setAuthList(data: BaseMsgType) → None¶

Update the authorization list.

Parameters:

datacmd_setAuthList.DataType: Authorization lists.

Notes

Add items if the data string starts with “+”, ignoring duplicates (both with respect to the existing items and within the data string). Remove items if the data string starts with “-”, ignoring missing items (items specified for removal that do not exist). Ignore whitespace after each comma and after the +/- prefix.

async do_setCheckpoints(data: BaseMsgType) → None¶

Set or clear the checkpoints at which to pause and stop.

This command is deprecated. Please set the checkpoints using the configure command.

Parameters:

datacmd_setCheckpoints.DataType: Names of checkpoints for pausing and stopping, each a single regular expression; “” for no checkpoints, “.*” for all.

Raises:

base.ExpectedError

If self.state.state is not one of:

lsst.ts.idl.enums.Script.ScriptState.UNCONFIGURED
lsst.ts.idl.enums.Script.ScriptState.CONFIGURED
lsst.ts.idl.enums.Script.ScriptState.RUNNING
lsst.ts.idl.enums.Script.ScriptState.PAUSED

async do_setGroupId(data: BaseMsgType) → None¶

Set or clear the group_id attribute.

The script must be in the Configured state. This command may be called multiple times. It is typically called when the script reaches the top position on the script queue.

Parameters:

datacmd_setGroupId.DataType: Group ID, or “” to clear the group ID.

Raises:

base.ExpectedError: If state.state is not lsst.ts.idl.enums.Script.ScriptState.CONFIGURED.

async do_setLogLevel(data: BaseMsgType) → None¶

Set logging level.

Parameters:

datacmd_setLogLevel.DataType: Logging level.

async do_stop(data: BaseMsgType) → None¶

Stop the script.

Parameters:

datacmd_stop.DataType: Ignored.

Notes

This is a no-op if the script is already exiting. This does not wait for _exit to run.

classmethod get_schema() → Dict[str, Any]¶

Return a jsonschema to validate configuration, as a dict.

Please provide default values for all fields for which defaults make sense. This makes the script easier to use.

If your script has no configuration then return None, in which case the config field of the configure command must be an empty string.

classmethod make_from_cmd_line(**kwargs: Any) → lsst.ts.salobj.base_script.BaseScript | None¶

Make a script from command-line arguments.

Return None if --schema specified.

Parameters:

kwargs: Keyword arguments for the script constructor. Must not include index.

Raises:

RuntimeError: If kwargs includes index.

next_supplemented_group_id() → str¶

Return the group ID supplemented with a new subgroup.

The returned string has this format: f”{self.group_id}#{subgroup_id}”, where subgroup_id is an integer that starts at 1 and is incremented for every call to this method.

Raises:

RuntimeError: If there is no group ID.

async put_log_level() → None¶: Output the logLevel event.

async run() → None¶

Execute script.

This method simply call arun with checkpoint=True.

async run_align() → LatissAlignResults¶

Runs wavefront estimation pipeline.

Returns:

resultsLatissAlignResults: A dataclass containing the results of the calculation.

set_metadata(metadata: BaseMsgType) → None¶

Sets script metadata.

Parameters:

metadatasalobj.type_hints.BaseMsgType: Script metadata topic. The information is set on the topic directly.

async set_state(state: lsst.ts.xml.enums.Script.ScriptState | int | None = None, reason: str | None = None, keep_old_reason: bool = False, force_output: bool = False) → None¶

Set the script state.

Parameters:

stateScriptState or int, optional: New state, or None if no change
reasonstr, optional: Reason for state change. None for no new reason.
keep_old_reasonbool: If true, keep old reason; append the reason argument after “;” if it is is a non-empty string. If false replace with reason, or “” if reason is None.
force_outputbool, optional: If true the output even if not changed.

Notes

The lastCheckpoint field is set from self.last_checkpoint, and the numCheckpoints field is set from self.num_checkpoints.

async start() → None¶: Finish construction.

async start_phase2() → None¶

Additional work after start before fully started.

Used by BaseCsc to transition to handle the initial state.

async take_intra_extra() → None¶

Take pair of Intra/Extra focal images to be used to determine the measured wavefront error.

Because m2 is being moved, the intra focal image occurs when the hexapod receives a positive offset and is pushed towards the primary mirror. The extra-focal image occurs when the hexapod is pulled back (negative offset) from the best-focus position.

Navigation

LatissWEPAlign¶