DESIGNATE RECTANGULAR

Syntax

Fixed

   DESIGNATE @int(1001:10099)
      CENTER @body
      REFERENCE RECTANGULAR
      (0:1){ FRAME @name }
      (3:3){ X @number
           | Y @number
           | Z @number }
      (0:3){ FROM  @calendar
           | TO    @calendar
           | EPOCH @calendar }

Moving

   DESIGNATE @int(1001:10099)
      CENTER @body
      REFERENCE RECTANGULAR
      (0:1){ FRAME @name  }
      (3:3){ X (1:2)@number
           | Y (1:2)@number
           | Z (1:2)@number }
      EPOCH @calendar
      (0:2){ FROM @calendar
           | TO   @calendar }

Description

When creating a designated object in this system, you must specify the x-, y-, and z-components of its position.

Definition

The rectangular reference frame may be any frame recognized by the SPICE frame system. It may be inertial or non-inertial. If it is not supplied, the IAU standard J2000 inertial reference frame will be assumed.

Examples

Example 1

In the following example, a designated object is placed at the the DSN tracking station 17.

   DEFINE DSN-17 1001
   DESIGNATE DSN-17
        CENTER 399
        REFERENCE RECTANGULAR
        FRAME EARTH_BODYFIXED
        X  3928.1829
        Y -5928.2819
        Z  1028.3829;

Example 2

In the following example, an initial state vector for the Voyager-1 spacecraft is used to approximate its asymptotic motion.

   DEFINE VOYAGER 1002;
 
   DESIGNATE VOYAGER
        CENTER 0
        REFERENCE RECTANGULAR
        X  1.5D9 KM  5.02 KM/SEC
        Y  1.2D9 KM  1.19 KM/SEC
        Z  0.2D9 KM  0.34 KM/SEC
        EPOCH 1 JAN 1991;