proof(luminary099): page 1164
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# GEOMSGN * NONE * SP +.5 IF DESIRED TRANSFER ANGLE IS LESS THAN 180 DEGREES, -.5 IF GREATER THAN 180 DEG.
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# GUESSW * NONE * AN INTERPRETER SWITCH TO BE SET IF NO GUESS OF COGA IS AVAILABLE, CLEAR IF A GUESS OF
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# Page 1164
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# * * COGA IS TO BE USED BY LAMBERT
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# COGA * +5 * DP GUESS OF COTANGENT OF FLIGHT PATH ANGLE (MEASURED FROM VERTICAL). THIS WILL BE
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# * * COGA IS TO BE USED BY LAMBERT
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# COGA * +5 * DP GUESS OF COTANGNT OF FLIGHT PATH ANGLE (MEASURED FROM VERTICAL). THIS WILL BE
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# * * IGNORED IF GUESSW IS SET.
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# NORMSW * NONE * AN INTERPRETER SWITCH TO BE SET IF UN IS TO BE AN INPUT TO THE SUBROUTINE, CLEAR IF
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# * * LAMBERT IS TO COMPUTE ITS OWN NORMAL (UN).
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# UN * +1 * DP UNIT NORMAL TO THE DESIRED ORBIT PLANE IN THE DIRECTION OF THE RESULTING ANGULAR
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# * * MOMENTUM VECTOR. THIS WILL BE IGNORED IF NORMSW IS CLEAR.
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# * * LAMBERT IS TO COMPUTE ITS OWN NORMAL (UN).
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# UN * +1 * DP UNIT NORMAL TO THE DESIRED ORBIT PLANE IN THE DIRECTION OF THE RESULTING ANGULAR
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# * * MOMENTUM VECTOR. THIS WILL BE IGNORED IF NORMSW IS CLEAR.
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# VTARGTAG * NONE * A S.P. TAG TO BE SET TO ZERO IF LAMBERT IS TO COMPUTE THE VELOCITY AT R2VEC AS WELL AS
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# * * AT R1VEC.
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# * * AT R1VEC.
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# ITERCTR * NONE * A S.P. COUNTER WHICH SPECIFIES THE MAXIMUM NUMBER OF ITERATIONS ALLOWABLE.
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# * * (AN ITERATION MEANS A PASS THRU KEPLER EQN (DELTIME). AT LEAST ONE OF THESE MUST
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# * * ALWAYS OCCUR, EVEN IF COGA CORRESPONDING TO SOLUTION WERE INPUT AS A GUESS.)
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# * * TWENTY ITERATIONS ARE SUFFICIENT TO SOLVE ALL PROBLEMS INCLUDING THOSE WITHOUT GUESS.
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# * * (AN ITERATION MEANS A PASS THRU KEPLER EQN (DELTIME). AT LEAST ONE OF THESE MUST
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# * * ALWAYS OCCUR, EVEN IF COGA CORRESPONDING TO SOLUTION WERE INPUT AS A GUESS.)
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# * * TWENTY ITERATIONS ARE SUFFICIENT TO SOLVE ALL PROBLEMS INCLUDING THOSE WITHOUT GUESS.
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#
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#
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# SUBROUTINES CALLED -
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# GEOM, GETX, DELTIME, ITERATOR, LAMENTER (PART OF NEWSTATE)
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#
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#
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# CALLING SEQUENCE AND NORMAL EXIT MODES -
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#
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# L CALL # MUST BE IN INTERPRETIVE MODE BUT OVFIND ARBITRARY.
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# L+1 LAMBERT # RETURNS WITH PL AT 0 AND WITH VVEC IN MPAC IF VTARGTAG WAS WAS NON-ZERO OR VTARGET
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# # IN MPAC IF VTARGTAG WAS ZERO
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# L+2 BON # CONTINUE IF SOLNSW CLEAR SINCE SOLUTION IS ACCEPTABLE
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# L+3 SOLNSW
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# L+4 LAMABORT
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#
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# IF A LAMBERT RESULT IS TO BE A FIRST GUESS FOR THE NEXT LAMBERT CALCULATION, COGA MUST BE PRESERVED AND
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# GUESSW MUST BE CLEAR FOR EACH SUCCEEDING LAMBERT CALL.
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#
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#
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# ABORT EXIT MODES -
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# IF SOLNSW WAS SET UPON EXITING, EITHER LAMBERT WAS ASKED TO COMPUTE A TRANSFER TOO NEAR 0 OR 360 DEG, OR T
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# WAS TOO SMALL TO PRODUCE A REALISTIC TRANSFER BETWEEN R1VEC AND R2VEC. IN EITHER CASE THE FIX MUST BE MADE
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