1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
/***********************************************/
/**
* @file gravityfield2PotentialCoefficients.cpp
*
* @brief Writes a gravity field to a file with potential coefficients.
*
* @author Torsten Mayer-Guerr
* @date 2002-05-18
*/
/***********************************************/
// Latex documentation
#define DOCSTRING docstring
static const char *docstring = R"(
This program evaluates a time variable \configClass{gravityfield}{gravityfieldType}
at a given \config{time} and saves it as a \file{spherical harmonics file}{potentialCoefficients}.
If set the expansion is limited in the range between \config{minDegree}
and \config{maxDegree} inclusivly.
The coefficients are related to the reference radius~\config{R}
and the Earth gravitational constant \config{GM}.
)";
/***********************************************/
#include "programs/program.h"
#include "files/fileSphericalHarmonics.h"
#include "classes/gravityfield/gravityfield.h"
/***** CLASS ***********************************/
/** @brief Writes a gravity field to a file with potential coefficients.
* @ingroup programsGroup */
class Gravityfield2PotentialCoefficients
{
public:
void run(Config &config, Parallel::CommunicatorPtr comm);
};
GROOPS_REGISTER_PROGRAM(Gravityfield2PotentialCoefficients, SINGLEPROCESS, "writes a gravity field to a file with potential coefficients", Gravityfield, PotentialCoefficients)
/***********************************************/
void Gravityfield2PotentialCoefficients::run(Config &config, Parallel::CommunicatorPtr /*comm*/)
{
try
{
FileName fileNameCoeff;
UInt minDegree, maxDegree = INFINITYDEGREE;
Time time;
Double GM, R;
GravityfieldPtr gravityfield;
readConfig(config, "outputfilePotentialCoefficients", fileNameCoeff, Config::MUSTSET, "", "");
readConfig(config, "gravityfield", gravityfield, Config::MUSTSET, "", "");
readConfig(config, "minDegree", minDegree, Config::DEFAULT, "0", "");
readConfig(config, "maxDegree", maxDegree, Config::OPTIONAL, "", "");
readConfig(config, "GM", GM, Config::DEFAULT, STRING_DEFAULT_GM, "Geocentric gravitational constant");
readConfig(config, "R", R, Config::DEFAULT, STRING_DEFAULT_R, "reference radius");
readConfig(config, "time", time, Config::OPTIONAL, "", "at this time the gravity field will be evaluated");
if(isCreateSchema(config)) return;
// Create potential coefficients
// -----------------------------
logStatus<<"create spherical harmonics"<<Log::endl;
SphericalHarmonics harm = gravityfield->sphericalHarmonics(time, maxDegree, minDegree, GM, R);
// write
// -----
logStatus<<"writing potential coefficients to file <"<<fileNameCoeff<<">"<<Log::endl;
writeFileSphericalHarmonics(fileNameCoeff, harm);
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
|
