At the end of May, the GRACE satellite's follow-up mission, GRACE-FO, was launched by SpaceX's Falcon 9 rocket at Vandenberg Air Force Base, aiming to map the Earth's gravitational field with unprecedented precision.
The pair of satellites will orbit the Earth in a precisely calculated orbit at a distance of 220km. They will use the microwave to continuously calculate the distance. When the satellite passes through the area with abnormal gravity, the satellite in front will be accelerated or decelerated first, and when the satellite in the rear passes through the same area, it will catch up with the satellite in front and recover. The original distance. With such a change in distance, very accurate gravitational change data can be obtained.
It is reported that this GRACE-FO, in addition to the microwave, also uses a new technology called "green laser pointer ranging interference" to provide accurate relative interference by measuring the distance more accurately. Angle information further increases the accuracy of heavy force measurement.
The new green laser pointer ranging interferometer developed by the NASA Jet Dynamics Laboratory (JPL) and the Max Planck Institute for Gravitational Physics in Germany uses a wavelength of only one tenth of the microwave to measure distance. Prior to this, this technology has been limited to laboratories.
Recently, the spine surgery team of the Xijing Hospital of the Air Force Military Medical University implanted medical fiber in the patient's body. After the operation, it was connected to the bio-laser nerve therapy device through the optical fiber interface that was placed outside the skin every day. The therapeutic laser was directly introduced into the spinal nerve injury site through the optical fiber. For the repair of injured nerves in patients with spinal nerve injury. The application of biogreen laser pointer technology in the treatment of spinal nerve injury is the first in the world.
At present, the clinical treatment of acute and chronic spinal nerve injury at home and abroad is mainly based on spinal bone decompression and fixation. The postoperative symptom recovery mainly depends on the spinal nerve self-healing ability. There is no direct treatment plan for spinal nerve injury.
The research team led by Director Wang Zhe of Xijing Hospital Spine Surgery lasted for 15 years. Based on the rehabilitation problem of acute and chronic spinal nerve injury, the use of bio-laser treatment technology to carry out continuous scientific research, the first proposed weak laser gradual gradient therapy after spinal surgery, and related units Co-designed and developed implantable biolaser spinal nerve rehabilitation therapy instrument, has successfully repaired injured nerves for many patients with spinal nerve injury.