import { MetricAgg, MetricField, RollupHour } from './contract';
export declare const SPEED_GUARD_KN = 80;
export interface NumAgg extends MetricAgg {
    min: number;
    max: number;
    avg: number;
    n: number;
}
export declare function haversineNm(lat1: number, lon1: number, lat2: number, lon2: number): number;
export declare function mergeAggs(aggs: readonly MetricAgg[]): NumAgg | null;
export interface WindowAgg {
    count: number;
    first_ts: number;
    last_ts: number;
    distance_nm: number;
    pos_first: {
        lat: number;
        lon: number;
    } | null;
    pos_last: {
        lat: number;
        lon: number;
    } | null;
    metrics: Partial<Record<MetricField, MetricAgg>>;
    path_metrics?: Record<string, MetricAgg>;
}
export declare function mergeHours(hours: readonly RollupHour[], guardKn?: number): WindowAgg;