### Instruction:

Extract the cause and effect entities from the following sentence:
During the science acquisition phase, one scan shall be performed from 6,000 km (0.5y + commissioning time) to 3,000 km (0.5y) to 15,000 km (1y) to 6,000 km (till end of mission)

### Assistant:

KEYWORD: During
VARIABLE: one scan
CAUSE_1: the science acquisition phase
CONDITION: to 15,000 km
EFFECT_1: to 6,000 km
NOT_RELEVANT: (till end of mission)

