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84 lines
2.9 KiB
C
84 lines
2.9 KiB
C
/********************************* TRICK HEADER *******************************
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PURPOSE:
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(Simple taget body tagetting information.)
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REFERENCES:
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((None))
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ASSUMPTIONS AND LIMITATIONS:
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((Purely Keplerian dynamics.))
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PROGRAMMERS:
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(((Edwin Z. Crues) (NASA) (Nov 2009) (--) (Initial version.)))
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*******************************************************************************/
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#ifndef _TARGET_BODY_H_
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#define _TARGET_BODY_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Target Body initialization parameters. */
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typedef struct { /* TargetBodyPlanet ------------------------------------ */
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double mu; /* (m3/s2) Planetary gravitational constant. */
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} TargetBodyPlanet; /* -------------------------------------------------- */
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/* Target Body initialization parameters. */
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typedef struct { /* TargetBodyInit -------------------------------------- */
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double position[3]; /* (m) Position vector of the target body. */
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double velocity[3]; /* (m/s) Velocity vector of the target body. */
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} TargetBodyInit; /* ---------------------------------------------------- */
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/* Target Body state parameters. */
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typedef struct { /* TargetBodyState -------------------------------------- */
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double position[3]; /* (m) Position vector of the target body. */
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double velocity[3]; /* (m/s) Velocity vector of the target body. */
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double acceleration[3]; /* (m/s2) Acceleration vector of the target body. */
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} TargetBodyState; /* ---------------------------------------------------- */
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/* Target Body itereation parameters. */
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typedef struct { /* TargetBodyIteration --------------------------------- */
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int iter_max; /* cnt Maximum number of iterations allowed. */
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int iter_cnt; /* cnt Iteration count. */
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double tolerance; /* (m) Tolerance for iteration converence. */
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double v_init[3]; /* (m/s) Initial velocity for this iteration. */
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double delta_r[3]; /* (m) Vector distance from the target location. */
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double delta_r_mag; /* (m) Total distance from the target location. */
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double delta_v[3]; /* (m/s) Change in initial velocity for targeting. */
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} TargetBodyIteration; /* ----------------------------------------------- */
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/* Target Body data parameters. */
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typedef struct { /* TargetBodyData -------------------------------------- */
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double position[3]; /* (m) Vector to target position. */
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double phi[6][6]; /* -- State transition matrix. */
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double phidot[6][6]; /* -- State transition matrix time derivative. */
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double F[6][6]; /* -- Working area. */
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double Gmat[3][3]; /* -- Working area. */
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} TargetBodyData; /* ---------------------------------------------------- */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _TARGET_BODY_H_ : Do NOT put anything after this line! */
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