import { AstroTime, Observer } from "astronomy-engine";
import { DayDurationResult, VaaraResult } from "../models/types";
export declare function computeVaara(sunriseTime: AstroTime): VaaraResult;
export declare function computeDayDuration(sunriseTime: AstroTime, sunsetTime: AstroTime): DayDurationResult;
export declare function calculateSunTimes(localDate: Date, observer: Observer): {
    sunriseTime: AstroTime;
    sunsetTime: AstroTime;
};