Building on heritage from the IBEX-Lo instrument aboard IBEX, IMAP-Lo provides much larger collection power due to its position at L1 (average increased viewing time 4× due to low backgrounds) and increases in geometric factor (3.2×), duty cycle, and efficiency of IBEX-Lo. This maximizes the weak heliospheric neutral signal, while eliminating ion, electron, and UV background sources. Combined with the pivoting FOV, IMAP-Lo improves the angular resolution of ISN flow parameters and can track the ISN flow over almost the entire year, overcoming the serious limitations facing body-fixed sensors.
All schematics and numbers are preliminary as of the beginning of Phase A. Additional information about each instrument can be found in the Open Access IMAP Paper.