Data Utilization Reset

X X X X X Aphelion X X X X X X X Change data utilization to 0 % full Review survey data Downlink data Uplink commands To transfer selected data Ka Ka Ka Ka Ka Ka X X X X X Orbit 6 Encounter Aphelion X X X Transfer selected data from I-SSRs to S/C SSR X Ka X Ka Ka Ka Ka Ka Ka X X Ka Instrument Encounter Prep Downlink data Change data utilization to 0 % full

Note that while reset of utilization to 0% occurs prior to encounter before perihelion, the increment of orbit number occurs at aphelion. Orbit number is for Ops an planning purposes, and is not known by or used by flight S/W Flight S/W manages 2 orbits of data volume on the SSR One SSR orbit “buffer” can be in the process of downlink completion while the 2nd orbit “buffer” is set to 0% full in preparation for the next data collection

For one instrument (Data is Fictitious) Utilization % Full Maximum Instrument Volume 100 % E E 2nd Orbit Maximum SSR Volume One Instrument 1st Orbit Maximum E E Ka Band Volume KA KA KA E KA E Encounter Data Utilization Reset