At 23:00 on September 20, 2020, under the operation of the flight control team of China’s first Mars exploration mission, four 120N engines of tianwen-1 spacecraft ignited at the same time for 20 seconds, successfully completed the second orbit correction, and verified the actual performance of the 120N engine in orbit. Up to now, tianwen-1 has been in orbit for 60 days, with a distance of 19 million km from the earth and a flight mileage of 160 million km. The system of the detector is in good condition, and the tracking of ground monitoring and communication centers and stations is normal. During the flight process of the detector, the orbit deviation caused by various reasons is corrected to make the detector fly closer to the theoretical orbit. The accuracy of tianwen-1 launching into orbit and the first half way correction is very high, but the correction amount is very small. [image] Google secretly tests 6GHz networks in 17 states of the United States

By ibmwl