Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellites (TRACERS) is a planned orbiter mission tasked to study the origins of the solar wind and how it affects Earth.

[6] TRACERS is a future mission by NASA that aims to answer long-standing questions critical to understanding the Sun-Earth System.

TRACERS is a pair of identically instrumented spinning spacecraft that will study how the Sun's solar wind interacts with the Earth's magnetosphere.

TRACERS was initially planned to be launched as a secondary mission to another orbiter named Polarimeter to Unify the Corona and Heliosphere (PUNCH).

[7][1] TRACERS will study a longstanding question about where reconnection happens at the magnetopause and how the solar wind affects the place and timing, helping NASA better forecast the influx of energetic particles into Earth's magnetic field that has the potential to disrupt the power grid and satellite communications.