We report “ ground truth ” , 28-3500 keV in-situ ion and 5.2-55 keV remotely sensed ENA measurements from Voyager 2/Low Energy Charged Particle ( LECP ) detector and Cassini/Ion and Neutral Camera ( INCA ) , respectively , that assess the components of the ion pressure in the heliosheath .
In this process , we predict an interstellar neutral hydrogen density of \sim 0.12 cm ^ { -3 } and an interstellar magnetic field strength of \sim 0.5 nT upstream of the heliopause in the direction of V2 , i.e . consistent with the measured magnetic field and neutral density measurements at Voyager 1 from August 2012 , when the spacecraft entered interstellar space , to date .
Further , this analysis results in an estimated heliopause crossing by V2 of \sim 119 AU , as observed , suggesting that the parameters deduced from the pressure analysis are valid .
The shape of the > 5.2 keV ion energy spectra play a critical role towards determining the pressure balance and acceleration mechanisms inside the heliosheath .