This would give support to scientific missions equipped with GPS receivers, and make its due contribution to the future oceanographic, climatic and remote sensing missions of our own country.
This study is reported in issue 54 (Jan. 2009) of the Chinese Science Bulletin.
In order to test the POD accuracy of SHORDE-III, Peng and Wu processed two cycles (Dec. 19, 2002 to Jan. 7, 2003) of the Jason-1 on-board GPS data, and assessed the orbits by comparing POE, orbit overlaps and independent SLR validations. These results show that: 1) there is no obvious systematic bias between POE and orbit solutions computed using the SHORDE-III procedure, the 3-D orbit difference RMS is about 5.71 cm, and the radial orbit RMS accuracy is about 1.71 cm; 2) the 3-D RMS of orbit overlaps is about 4.89 cm, and the radial RMS accuracy is about 1.45 cm; 3) no significant bias has been found for the SLR residuals. The 20-day statistic bias of the SLR residual with the 15-degree elevation cutoff is 0.07}3.69 cm, and the statistic bias of the 60-degree elevation cutoff is 0.49}1.61 cm.
The main conclusion reported by the authors is that the models, strategy, and procedure described in this study are viable for use in real-world situations, and provide highly accurate GPS-based solutions.
This study is supported by the National Natural Science Foundation of China (Grant No. 40274006), the National High-Tech R&D Program (863 Program) of China (2006AA12A107), and the Science & Technology Commission of Shanghai Municipality (06DZ22101).
Reference: Peng DongJu-WU Bin. Precise orbit determination for Jason-1 satellite using on-board GPS data with cm-level accuracy. Chinese Science BulletinC2009C54(2): 196-202
Dongju Peng | EurekAlert!
Powerful IT security for the car of the future – research alliance develops new approaches
25.05.2018 | Universität Ulm
Supercomputing the emergence of material behavior
18.05.2018 | University of Texas at Austin, Texas Advanced Computing Center
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
25.05.2018 | Event News
02.05.2018 | Event News
13.04.2018 | Event News
25.05.2018 | Event News
25.05.2018 | Machine Engineering
25.05.2018 | Life Sciences