/* Copyright 2011-2012 Space Applications Services
* Licensed to CS Communication & Systèmes (CS) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* CS licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.orekit.models.earth;
import java.io.Serializable;
/** Defines a tropospheric model, used to calculate the path delay imposed to
* electro-magnetic signals between an orbital satellite and a ground station.
* @author Thomas Neidhart
* @since 7.1
*/
public interface TroposphericModel extends Serializable {
/** Calculates the tropospheric path delay for the signal path from a ground
* station to a satellite.
*
* @param elevation the elevation of the satellite, in radians
* @param height the height of the station in m above sea level
* @return the path delay due to the troposphere in m
*/
double pathDelay(double elevation, double height);
}