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THE NASA FAST AURORAL SNAPSHOT (FAST) MISSION WAS DESIGNED TO STUDY THE DYNAMICS OF THE AURORAL REGION. FAST WAS LAUNCHED IN 1996 INTO A 350 KM BY 4175 KM ORBIT WITH 83 DEGREE INCLINATION. THE PAYLOAD INCLUDED AN ION COMPOSITION INSTRUMENT TEAMS WHICH COVERED THE ENERGY RANGE 1 EV/E TO 12 KEV/E. THE MISSION OPERATED UNTIL 2009 PROVIDING AN EXTENSIVE DATASET FOR STUDYING THE AURORAL OUTFLOW VARIATIONS OVER A FULL SOLAR CYCLE. THERE HAVE BEEN NO SUBSEQUENT MISSIONS FOCUSED ON THIS REGION SO IT REMAINS THE PRIMARY DATASET FOR STUDYING AURORAL PHENOMENA IN SITU. THIS DATA CAN BE USED TO STUDY MASS-DEPENDENT ION ACCELERATION AND OUTFLOW IN THE AURORAL REGION. UNDERSTANDING THE DRIVERS OF ION OUTFLOW IS A KEY ASPECT OF THE THE HIGH PRIORITY QUESTION IDENTIFIED BY THE NASA 2014 STRATEGIC PLAN "HOW DO GEOSPACE AND PLANETARY ENVIRONMENTS RESPOND" TO VARIABLE SOLAR WIND INPUT. HOWEVER THREE PROBLEMS MADE ANALYSIS OF THE DATA PROBLEMATIC IN THE LATER YEARS. THE FIRST WAS THE DECLINE OF THE EFFICIENCIES IN THE SPIN-PLANE INSTRUMENT POSITIONS. BECAUSE THESE POSITIONS WERE USED TO GENERATE THE STANDARD PITCH ANGLE DATA PRODUCT THIS SIGNIFICANTLY AFFECTED THE COUNTING STATISTICS FOR SCIENCE INVOLVING PITCH ANGLE ANALYSIS. A SECOND PROBLEM WAS THAT THE ANGULAR CLASSIFICATION OCCASIONALLY FAILED. WHEN THE ANGULAR CLASSIFICATION FAILED THE DATA WAS PUT INTO ANGULAR BIN ZERO "BIN 0" WHICH IS ONE OF THE INSTRUMENT SPIN-PLANE POSITIONS. DURING LATER YEARS WHEN THE EFFICIENCIES OF THE SPIN-PLANE POSITIONS HAD DECLINED MOST OF THE DATA IN THE SPIN PLANE POSITIONS USED FOR THE PITCH ANGLES WAS FROM BIN 0. BY USING THE FULL 3D MEASUREMENT AND REMOVING BIN 0 A MUCH BETTER PITCH ANGLE PRODUCT CAN BE PRODUCED.

$51,183FY2020National Aeronautics and Space AdministrationNASA

University System Of New Hampshire

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