tropGPT2.cpp File Reference

Data Structures
struct	GPTVals
struct	GptGrid
	gpt grid file contents More...

Functions
int	sign (double x)
void	vmf1 (const double ah, const double aw, double mjd, double lat, double hgt, double elev, double &dryMap, double &wetMap)
	vienna mapping function.
void	readgrid (string filepath)
	read GPT grid file
double	coef (const array< double, 5 > &a, double cosfy, double sinfy, double coshy, double sinhy)
	coefficients multiplication
double	coefr (double p1, double p2, double l1, double l2, double a[4])
GPTVals	gpt2 (const vector< GptGrid > &gptg, double mjd, double lat, double lon, double hell)
	global pressure and temperature
double	tropGPT2 (Trace &trace, GTime time, VectorPos &pos, double el, double &dryZTD, double &dryMap, double &wetZTD, double &wetMap, double &var)
	Troposphere zenith hydrastatic delay and mapping function.

Function Documentation

coef()

double coef	(	const array< double, 5 > &	a,
		double	cosfy,
		double	sinfy,
		double	coshy,
		double	sinhy )

coefficients multiplication

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coefr()

double coefr	(	double	p1,
		double	p2,
		double	l1,
		double	l2,
		double	a[4] )

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gpt2()

GPTVals gpt2	(	const vector< GptGrid > &	gptg,
		double	mjd,
		double	lat,
		double	lon,
		double	hell )

global pressure and temperature

Parameters

gptg	gpt grid information
mjd	modified julian date
lat	ellipsoidal lat (rad)
lon	ellipsoidal lon (rad)
hell	ellipsoidal height (m)

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readgrid()

void readgrid

(

string

filepath

)

read GPT grid file

Parameters

filepath

vmf1 coefficients filename

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sign()

int sign

(

double

x

)

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tropGPT2()

double tropGPT2	(	Trace &	trace,
		GTime	time,
		VectorPos &	pos,
		double	el,
		double &	dryZTD,
		double &	dryMap,
		double &	wetZTD,
		double &	wetMap,
		double &	var )

Troposphere zenith hydrastatic delay and mapping function.

gpt2 is used to get pressure, temperature, water vapor pressure and mapping function coefficients and then vmf1 is used to derive dry and wet mapping function.

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vmf1()

void vmf1	(	const double	ah,
		const double	aw,
		double	mjd,
		double	lat,
		double	hgt,
		double	elev,
		double &	dryMap,
		double &	wetMap )

vienna mapping function.

coefficients coming from either GPT2 or from vmf file

Parameters

ah	vmf1 dry coefficients
aw	vmf1 wet coefficients
mjd	modified julian date
lat	ellipsoidal lat (rad)
hgt	height (m)
elev	zenith distance (rad)

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