 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] CRAWFORD FLETCHER  ]    PASS PROGRAM NOTE        ]     50120        ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: 07/01/83   ]
 ] IBM/282-7333       ]      RELEASE NOTE( )        ] REV A: 06/21/89  ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ]  OI7 AND SUBS                 ]  CREW (X)  GROUND ( )  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW ( )  GNC (X)  VU ( )  SM/PL ( )] G2                              ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  DISP                                            ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: 5.24                                           ]
 ]_____________________________________________________________________]
 ] TITLE:  TIME TO COMMON NODE OSCILLATION                             ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ]                                                                     ]
 ] A COMPUTATION IS PERFORMED TO DISPLAY ON THE REL NAV DISPLAY THE    ]
 ] TIME TO THE COMMON NODE OF THE ORBITAL PLANES OF THE ORBITER AND    ]
 ] TARGET.  WHEN THE PLANES ARE NEARLY COPLANAR, THE TIME TO THE COM-  ]
 ] MON NODE IS DIFFICULT TO DETERMINE.  THEREFORE, THE VALUE DISPLAYED ]
 ] FOR TIME TO THE COMMON NODE MAY FLUCTUATE BETWEEN THAT VALUE AND    ]
 ] THAT VALUE PLUS ONE-HALF THE ORBITAL PERIOD.                        ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]USER RESPONSE:                                                       ]
 ]                                                                     ]
 ] NO ACTION REQUIRED.  THIS IS A VERY ACCURATE INDICATION THAT THE    ]
 ] COMPUTED ORBITAL PLANES ARE NEARLY COPLANAR.                        ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]                                                                     ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: WYATT COOPER         DATE 07/13/89]                             ]
 ]    --------------------      ---------]                             ]
 ]SSD: SAM ANKNEY           DATE 07/14/89]                             ]
 ]    --------------------      ---------] M.C. GREMILLION    08/20/89 ]
 ]PF MGR: MOISES N. MONTEZ  DATE 07/31/89]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]_______________________________________]_____________________________]
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