Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Precise orbit determination for Jason-1 satellite using on-board GPS data with centimeter-level accuracy

04.02.2009
As the on-board GPS has become one of the key POD approaches for LEO satellites and will be widely placed on the future LEO mission to support their orbit accuracy requirements, Shanghai Astronomical Observatory has developed the SHOEDEE-III procedure which may support zero-difference dynamic orbit determination as well as single-difference dynamic orbit determination using on-board GPS data by fixing GPS ephemeris and clock bias.

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 BulletinC2009C54(2): 196-202

Dongju Peng | EurekAlert!
Further information:
http://www.shao.ac.cn

More articles from Information Technology:

nachricht Smarter robot vacuum cleaners for automated office cleaning
15.08.2017 | Fraunhofer-Institut für Arbeitswirtschaft und Organisation IAO

nachricht Researchers 3-D print first truly microfluidic 'lab on a chipl devices
15.08.2017 | Brigham Young University

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

Gold shines through properties of nano biosensors

17.08.2017 | Physics and Astronomy

Greenland ice flow likely to speed up: New data assert glaciers move over sediment, which gets more slippery as it gets wetter

17.08.2017 | Earth Sciences

Mars 2020 mission to use smart methods to seek signs of past life

17.08.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>