Philae was nudged gently away from Rosetta at a speed of about 80 centimetres a second, and left to drift towards the comet under the influence of that object's feeble gravity.
“菲莱”以每秒80厘米的速度被推离开罗塞塔，在彗星很小的引力作用下漂向彗星。
2
Accelerometer of platform is used to measure the attitude of carrier. Gravity component at two input axes of DTG is calculated. The Gyro drift model is made to compensate the azimuth.
The removal of the non-tidal drift from the observed gravity data is one necessary job for studying and predicting earthquakes by using the observed gravity data, the usual method used is b.