The initial linear movement or deviation from a set path or correct position.

प्रारंभिक परिवर्तन या विचलन

English Usage: Scientists measured the first order drift of the satellite as it moved from its expected orbit.

Hindi Usage: वैज्ञानिकों ने निर्धारित कक्षा से उपग्रह का प्रारंभिक बहाव मापा।