A Plasma Electron And
Current Experiment instrument can measure the three dimensional
velocity distribution of electrons in a space plasma, for an energy range from
a few electronvolts to about 30 kiloelectronvolts. MSSL is the PI Institution
for the PEACE instruments. There is a Double Star PEACE instrument on each of
the two Double Star spacecraft, planned for launch in December 2003 and June
2004. The Double Star PEACE instrument has a single sensor, unlike the two sensor
Cluster PEACE instruments.