import type { Grib2DataRepresentationSection, Reader } from '../../../index.js';
/**
 * Unpack a data field that was packed using a simple packing algorithm, using info from the GRIB2
 * Data Representation Template 5.0.
 * @param reader - The raw data to convert
 * @param drs - The data representation section
 * @returns - The converted data
 */
export declare function spectralSimpleUnpacking(reader: Reader, drs: Grib2DataRepresentationSection): number[];
/**
 * @param reader - The raw data to convert
 * @param drs - The data representation section
 * @returns - The unpacked values
 */
export declare function spectralComplexUnpacking(reader: Reader, drs: Grib2DataRepresentationSection): number[];
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