from __future__ import annotations
from abc import ABCMeta, abstractmethod
from dataclasses import dataclass, field
from typing import Annotated, Any
from ..utils.enums import Unit
from ..utils.time import Time
from .interface import Interface
[docs]
@dataclass
class TrackingRateState:
ra_rate: Annotated[float, Unit.ARCSEC_PER_SEC]
dec_rate: Annotated[float, Unit.ARCSEC_PER_SEC]
time: Time = field(default_factory=Time.now)
[docs]
@dataclass
class TrackingRateCapabilities:
min_update_interval: Annotated[float, Unit.SECONDS]
"""Minimum time between successive set_tracking_rate calls this hardware/protocol accepts,
independent of whether the value actually changed. Populated per-driver from whatever its
protocol allows; 0 if the hardware has no such floor."""
class ITrackingRate(Interface, metaclass=ABCMeta):
"""The module accepts an arbitrary non-sidereal tracking rate as an absolute RA/Dec offset."""
__module__ = "pyobs.interfaces"
state = TrackingRateState
capabilities = TrackingRateCapabilities
[docs]
@abstractmethod
async def set_tracking_rate(
self,
ra_rate: Annotated[float, Unit.ARCSEC_PER_SEC],
dec_rate: Annotated[float, Unit.ARCSEC_PER_SEC],
**kwargs: Any,
) -> None:
"""Sets an absolute tracking rate on the sky, in arcsec/sec.
Args:
ra_rate: Rate in RA, arcsec/sec on the sky.
dec_rate: Rate in Dec, arcsec/sec on the sky.
Raises:
MoveError: If rate could not be set.
"""
...
__all__ = ["ITrackingRate", "TrackingRateState", "TrackingRateCapabilities"]