The Human Exploration Research Analog (HERA) serves as an analog for the NASA Human Research Program (HRP) to study and evaluate impacts due to isolation, remoteness, and confined habitation. HERA is an ideal analog for research involving behavioral health and performance assessments, communication and autonomy studies, human factors evaluations, and medical capabilities assessments. Each HERA Campaign includes multiple missions simulating one or more space exploration scenarios and supporting multiple investigations. HERA is located at the Johnson Space Center in Houston, Texas.
HERA Campaign 4 included 18 investigations. Originally planned to include four 45-day missions, HERA Campaign 4 ultimately consisted of four 45-day missions and one 23-day mission as follows:
Mission 2 (C4M2) was discontinued at the 23 day mark due to effects of Hurricane Harvey.