### Instruction:

Extract the cause and effect entities from the following sentence:
DC non-gravitational accelerations on the spacecraft shall be less than 1E-6 m/s2 , within the instrument volume, when measuring

### Assistant:

KEYWORD: when
VARIABLE: DC non-gravitational accelerations on the spacecraft
CAUSE_1: the instrument volume
CAUSE_2: measuring
CONDITION: shall be less than 1E-6 m/s2
EFFECT_1: DC non-gravitational accelerations on the spacecraft shall be less than 1E-6 m/s2

