Index Page spkw05_c

A B C D E F G H I J K L M N O P Q R S T U V W X

Procedure Abstract Required_Reading Keywords Brief_I/O Detailed_Input | Detailed_Output Parameters Exceptions Files Particulars Examples | Restrictions Literature_References Author_and_Institution Version Index_Entries

#### Procedure

       void spkw05_c ( SpiceInt                handle,
                       SpiceInt                body,
                       SpiceInt                center,
                       ConstSpiceChar        * frame,
                       SpiceDouble             first,
                       SpiceDouble             last,
                       ConstSpiceChar        * segid,
                       SpiceDouble             gm,
                       SpiceInt                n,
                       ConstSpiceDouble        states [][6],
                       ConstSpiceDouble        epochs []      )

#### Abstract

       Write an SPK segment of type 5 given a time-ordered set of
       discrete states and epochs, and the gravitational parameter
       of a central body.

#### Required_Reading

       SPK
       SPC
       NAIF_IDS

#### Keywords

       EPHEMERIS

#### Brief_I/O

       Variable  I/O  Description
       --------  ---  --------------------------------------------------
       handle     I   Handle of an SPK file open for writing.
       body       I   Body code for ephemeris object.
       center     I   Body code for the center of motion of the body.
       frame      I   The reference frame of the states.
       first      I   First valid time for which states can be computed.
       last       I   Last valid time for which states can be computed.
       segid      I   Segment identifier.
       gm         I   Gravitational parameter of central body.
       n          I   Number of states and epochs.
       states     I   States.
       epochs     I   Epochs.

#### Detailed_Input

       handle      is the file handle of an SPK file that has been
                   opened for writing.

       body        is the NAIF ID for the body whose states are
                   to be recorded in an SPK file.

       center      is the NAIF ID for the center of motion associated
                   with BODY.

       frame       is the reference frame that states are referenced to,
                   for example "J2000".

       first       are the bounds on the ephemeris times, expressed as
       last        seconds past J2000, for which the states can be used
                   to interpolate a state for BODY.

       segid       is the segment identifier. An SPK segment identifier
                   may contain up to 40 characters.

       gm          is the gravitational parameter of the central body
                   ( in units of kilometers **3 / seconds **2 ).

       n           is the number of states and epochs to be stored
                   in the segment.

       states      contains a time-ordered array of geometric states
                   ( x, y, z, dx/dt, dy/dt, dz/dt, in kilometers and
                   kilometers per second ) of the target body with
                   respect to the central body specified in the segment
                   descriptor.

       epochs      contains the epochs (ephemeris seconds past J2000)
                   corresponding to the states in states.  Epochs must
                   form a strictly increasing sequence.

#### Detailed_Output

       None.  A type 5 segment is written to the file attached to handle.

#### Parameters

       None.

#### Exceptions

       1) If the input epochs do not form an increasing sequence, the
          error SPICE(UNORDEREDTIMES) will be signaled.

       2) If the number of states and epochs is not positive then the
          error SPICE(NUMSTATESNOTPOS) will be signaled.

       3) If FIRST is greater than LAST then the error
          SPICE(BADDESCRTIMES) will be signaled.

       4) If SEGID is more than 40 characters long, the error
          SPICE(SEGIDTOOLONG) is signaled.

       5) If SEGID contains any nonprintable characters, the error
          SPICE(NONPRINTABLECHARS) is signaled.

       6) Any file I/O problems will be detected and diagnosed by one
          of the DAF routines called by this routine.

       7) The error SPICE(EMPTYSTRING) is signaled if either input
          string does not contain at least one character, since the
          input strings cannot be converted to a Fortran-style string
          in this case.

       8) The error SPICE(NULLPOINTER) is signaled if either input string
          pointer is null.

#### Files

       A new type 05 SPK segment is written to the SPK file attached
       to handle.

#### Particulars

       This routine writes an SPK type 05 data segment to the open SPK
       file according to the format described in the type 05 section of
       the SPK Required Reading. The SPK file must have been opened with
       write access.

#### Examples

       Suppose that you have states and are prepared to produce
       a segment of type 05 in an SPK file.

       The following code fragment could be used to add the new segment
       to a previously opened SPK file attached to handle. The file must
       have been opened with write access.

          #include "SpiceUsr.h"
                 .
                 .
                 .
          /.
          Create a segment identifier.
          ./
          ConstSpiceChar  * segid = "MY_SAMPLE_SPK_TYPE_5_SEGMENT";

          /.
          Write the segment.
          ./
          spkw05_c ( SpiceInt                handle,
                     SpiceInt                body,
                     SpiceInt                center,
                     ConstSpiceChar        * frame,
                     SpiceDouble             first,
                     SpiceDouble             last,
                     ConstSpiceChar        * segid,
                     SpiceDouble             gm,
                     SpiceInt                n,
                     SpiceDouble             states,
                     SpiceDouble             epochs  );

#### Restrictions

       None.

#### Literature_References

       None.

#### Author_and_Institution

       N.J. Bachman    (JPL)
       K.R. Gehringer  (JPL)
       J.M. Lynch      (JPL)
       W.L. Taber      (JPL)
       I.M. Underwood  (JPL)

#### Version

       -CSPICE Version 1.0.0, 23-JUN-1999 (NJB)(KRG)(JML)(WLT)(IMU)

#### Index_Entries

       write spk type_5 ephemeris data segment

#### Link to routine spkw05_c source file spkw05_c.c

    Wed Apr  5 17:54:44 2017