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pck.h

pck.h#

Defines

PCK_RECORD_LEN#

Length of a record in an PCK file.

Functions

void pck_free(PckInfo *bpc)#

Free the memory allocated for an PckInfo structure.

Parameters:

bpc – [in] PckInfo structure.

PckInfo *pck_init(const std::string &path)#

Initialise a PCK file.

Parameters:

path – [in] Path to the PCK file.

Returns:

PckInfo* Pointer to the PckInfo structure for the PCK file.

void pck_calc(PckInfo *bpc, real epoch, int spiceId, real *rotMat, real *rotMatDot)#

Compute angle,angleDot for a given frame at a given time using an PckInfo structure.

Parameters:

  • bpc – [in] PckInfo structure.

  • epoch – [in] Epoch to compute the state at (MJD ET).

  • spiceId – [in] SPICE ID of the frame.

  • rotMat – [out] Rotation matrix

  • rotMatDot – [out] Derivative of the rotation matrix

void iau_to_euler(const real t0_mjd, std::string iauFrame, real *euler)#

Compute angle,angleDot for a given frame at a given time using the IAU pole polynomials.

Parameters:

  • t0_mjd – [in] Epoch to compute the rotation matrix at (MJD ET).

  • iauFrame – [in] IAU frame name.

  • euler – [out] Real array of 6 elements containing the 313 Euler angles and their derivatives.

void euler313_to_rotMat(const real euler[6], real *rotMat, real *rotMatDot)#

Convert a 313 Euler angle to a rotation matrix and its derivative.

Parameters:

  • euler – [in] Real array of 6 elements containing the 313 Euler angles and their derivatives.

  • rotMat – [out] Real array of 9 elements to store the rotation matrix.

  • rotMatDot – [out] Real array of 9 elements to store the rotation matrix derivative.

void get_pck_rotMat(const std::string &from, const std::string &to, const real &t0_mjd, PckEphemeris &ephem, std::vector<std::vector<real>> &xformMat)#

Get the rotation matrix from one frame to another.

Parameters:

  • from – [in] Frame to rotate from.

  • to – [in] Frame to rotate to.

  • t0_mjd – [in] t0_mjd Epoch to compute the rotation matrix at (MJD ET).

  • ephem – [in] PckEphemeris structure.

  • xformMat – [out] Rotation matrix from ‘from’ to ‘to’.

struct PckTarget#
#include <pck.h>

Structure to hold the data for a single frame in an PCK file.

Param code:

SPICE ID of the frame.

Param ref:

Inertial reference of the frame (usually ECLIPJ2000).

Param beg:

Starting epoch.

Param end:

End epoch.

Param res:

Epoch span.

Param one:

First record index.

Param two:

Final record index.

Param ind:

Span of the records.

Public Members

int code#
int ref#
double beg#
double end#
double res#
int *one#
int *two#
int ind#
struct PckInfo#
#include <pck.h>

Structure to hold the data for a single PCK file.

Param targets:

Array of PckTarget.

Param num:

Number of targets.

Param allocatedNum:

Number of allocated targets.

Param map:

Memory map of the PCK file.

Param len:

Length of the memory map.

Param spiceIdToIdx:

Map of SPICE ID to index in the targets array.

Public Members

PckTarget *targets#
int num#
int allocatedNum#
void *map#
size_t len#
std::unordered_map<int, int> spiceIdToIdx#
struct PckEphemeris#
#include <pck.h>

Structure to hold all the data for the PCK files in a PropSimulation.

Param histPckPath:

Path to the historical PCK file.

Param latestPckPath:

Path to the latest PCK file.

Param predictPckPath:

Path to the predicted PCK file.

Param histPck:

PckInfo structure for the historical PCK file.

Param latestPck:

PckInfo structure for the latest PCK file.

Param predictPck:

PckInfo structure for the predicted PCK file.

Public Members

std::string histPckPath#
std::string latestPckPath#
std::string predictPckPath#
PckInfo *histPck = nullptr#
PckInfo *latestPck = nullptr#
PckInfo *predictPck = nullptr#