Package org.orekit.models.earth.troposphere

Class TroposphericModelUtils

java.lang.Object

org.orekit.models.earth.troposphere.TroposphericModelUtils

public class TroposphericModelUtils
extends Object

Utility class for tropospheric models.

Since:

11.0

Author:

Bryan Cazabonne

Field Summary

Fields

Modifier and Type	Field	Description
static Unit	HECTO_PASCAL	HectoPascal unit.
static Unit	MICRO_M	Micrometers unit.
static Unit	NANO_M	Nanometers unit.
static PressureTemperatureHumidity	STANDARD_ATMOSPHERE	Standard atmosphere.
static PressureTemperatureHumidityProvider	STANDARD_ATMOSPHERE_PROVIDER	Provider for standard atmosphere.

Method Summary

Modifier and Type	Method	Description
static double	computeHeightCorrection(double elevation, double height)	This method computes the height correction for the hydrostatic component of the mapping function.
static <T extends CalculusFieldElement<T>> T	computeHeightCorrection(T elevation, T height, Field<T> field)	This method computes the height correction for the hydrostatic component of the mapping function.
static double	mappingFunction(double a, double b, double c, double elevation)	Compute the mapping function related to the coefficient values and the elevation.
static <T extends CalculusFieldElement<T>> T	mappingFunction(T a, T b, T c, T elevation)	Compute the mapping function related to the coefficient values and the elevation.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NANO_M

public static final Unit NANO_M

Nanometers unit.

Since:

12.1

MICRO_M

public static final Unit MICRO_M

Micrometers unit.

Since:

12.1

HECTO_PASCAL

public static final Unit HECTO_PASCAL

HectoPascal unit.

Since:

12.1

STANDARD_ATMOSPHERE

public static final PressureTemperatureHumidity STANDARD_ATMOSPHERE

Standard atmosphere.

• altitude: 0m
• temperature: 20 degree Celsius
• pressure: 1013.25 mbar
• humidity: 50%

Since:

12.1

See Also:

STANDARD_ATMOSPHERE_PROVIDER

STANDARD_ATMOSPHERE_PROVIDER

public static final PressureTemperatureHumidityProvider STANDARD_ATMOSPHERE_PROVIDER

Provider for standard atmosphere.

Since:

12.1

Method Detail

mappingFunction

public static double mappingFunction(double a,
                                     double b,
                                     double c,
                                     double elevation)

Compute the mapping function related to the coefficient values and the elevation.

Parameters:

a - a coefficient

b - b coefficient

c - c coefficient

elevation - the elevation of the satellite, in radians.

Returns:

the value of the function at a given elevation

mappingFunction

public static <T extends CalculusFieldElement<T>> T mappingFunction(T a,
                                                                    T b,
                                                                    T c,
                                                                    T elevation)

Compute the mapping function related to the coefficient values and the elevation.

Type Parameters:

T - type of the elements

Parameters:

a - a coefficient

b - b coefficient

c - c coefficient

elevation - the elevation of the satellite, in radians.

Returns:

the value of the function at a given elevation

computeHeightCorrection

public static double computeHeightCorrection(double elevation,
                                             double height)

This method computes the height correction for the hydrostatic component of the mapping function. The formulas are given by Neill's paper, 1996:

Niell A. E. (1996) "Global mapping functions for the atmosphere delay of radio wavelengths,” J. Geophys. Res., 101(B2), pp. 3227–3246, doi: 10.1029/95JB03048.

Parameters:

elevation - the elevation of the satellite, in radians.

height - the height of the station in m above sea level.

Returns:

the height correction, in m

computeHeightCorrection

public static <T extends CalculusFieldElement<T>> T computeHeightCorrection(T elevation,
                                                                            T height,
                                                                            Field<T> field)

This method computes the height correction for the hydrostatic component of the mapping function. The formulas are given by Neill's paper, 1996:

Niell A. E. (1996) "Global mapping functions for the atmosphere delay of radio wavelengths,” J. Geophys. Res., 101(B2), pp. 3227–3246, doi: 10.1029/95JB03048.

Type Parameters:

T - type of the elements

Parameters:

elevation - the elevation of the satellite, in radians.

height - the height of the station in m above sea level.

field - field to which the elements belong

Returns:

the height correction, in m