import { Cloud, Wind } from './metar.types.js';
/**
 * Represents a wind vector with angle and decomposed components.
 *
 * @interface WindVector
 * @property {number} angle - The angle of the wind in degrees.
 * @property {number} headwind - The headwind component of the wind vector.
 * @property {number} crosswind - The crosswind component of the wind vector.
 */
export interface WindVector {
    angle: number;
    headwind: number;
    crosswind: number;
}
/**
 * Calculates the wind vector relative to the given true track.
 *
 * @param wind - An object representing the wind, containing direction and speed.
 * @param trueTrack - The current true track in degrees.
 * @returns An object containing the wind angle, headwind, and crosswind components.
 */
export declare const calculateWindVector: (wind: Wind, trueTrack: number) => WindVector;
/**
 * Calculates True Airspeed.
 *
 * @param indicatedAltitudeFt Indicated altitude in feet.
 * @param qnhHpa Altimeter setting in hPa.
 * @param oatCelsius Outside Air Temperature in Celsius.
 * @param kcas Knots Calibrated Airspeed (or KEAS if compressibility is negligible).
 * @returns Knots True Airspeed.
 */
export declare const calculateTrueAirspeed: (indicatedAltitudeFt: number, qnhHpa: number, oatCelsius: number, kcas: number) => number;
/**
 * Calculates the wind correction angle for the given wind, true track, and airspeed.
 *
 * @param wind - An object representing the wind, containing direction and speed.
 * @param trueTrack - The true track in degrees.
 * @param airSpeed - The airspeed in knots.
 * @returns The wind correction angle in degrees.
 */
export declare const calculateWindCorrectionAngle: (wind: Wind, trueTrack: number, airSpeed: number) => number;
/**
 * Calculates the groundspeed for the given wind, airspeed, and heading.
 *
 * @param wind - An object representing the wind, containing degrees and speed.
 * @param airSpeed - The airspeed in knots.
 * @param heading - The heading in degrees.
 * @returns The groundspeed in knots.
 */
export declare const calculateGroundspeed: (wind: Wind, airSpeed: number, heading: number) => number;
/**
 * Creates a bounding box around a geographic center point with a specified radius.
 *
 * This function generates a circular polygon around the center point and returns
 * its bounding box, which can be used for geographic searches or spatial queries.
 *
 * @param center - The center point as a GeoJSON Position [longitude, latitude]
 * @param radiusKm - The radius in kilometers to extend from the center point
 * @returns A GeoJSON BBox [minLon, minLat, maxLon, maxLat] encompassing the circular area
 *
 * @example
 * ```typescript
 * // Create a bounding box 50km around Amsterdam
 * const bbox = createBoundingBox([4.9041, 52.3676], 50);
 * // Returns: [4.254, 51.918, 5.554, 52.817]
 * ```
 */
export declare const createBoundingBox: (center: GeoJSON.Position, radiusKm: number) => GeoJSON.BBox;
/**
 * Sorts an array of clouds by their height in ascending order.
 *
 * @param clouds - The array of clouds to sort
 * @returns The sorted array of clouds
 */
export declare const sortClouds: (clouds: Cloud[]) => Cloud[];
/**
 * Checks if the given string is a valid ICAO code.
 *
 * @param icao - The string to check
 * @returns True if the string is a valid ICAO code, false otherwise
 */
export declare const isICAO: (icao: string) => boolean;
/**
 * Normalizes the given ICAO code to uppercase.
 *
 * @param icao - The ICAO code to normalize
 * @returns The normalized ICAO code
 */
export declare const normalizeICAO: (icao: string) => string;
/**
 * Checks if the given string is a valid IATA code.
 *
 * @param iata - The string to check
 * @returns True if the string is a valid IATA code, false otherwise
 */
export declare const isIATA: (iata: string) => boolean;
/**
 * Normalizes the given IATA code to uppercase.
 *
 * @param iata - The IATA code to normalize
 * @returns The normalized IATA code
 */
export declare const normalizeIATA: (iata: string) => string;
/**
 * Capitalizes the first letter of each word in a string
 *
 * @param text - The input text to capitalize
 * @returns The text with the first letter of each word capitalized
 */
export declare const capitalizeWords: (text: string) => string;