Satellite orbit error due to geopotential model error using perturbation theory: applications to ROCSAT-2 and COSMIC missions

2002 ◽  
Vol 28 (3) ◽  
pp. 357-367 ◽  
Author(s):  
Cheinway Hwang ◽  
Lih-Shinn Hwang
Keyword(s):  
Perturbation Theory ◽  
Satellite Orbit ◽  
Model Error ◽  
Geopotential Model ◽  
Orbit Error

scholarly journals Influence of the GEO satellite orbit error fluctuation correction on the BDS WADS zone correction

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Binghao Wang ◽  
Jianhua Zhou ◽  
Bin Wang ◽  
Dianwei Cong ◽  
Hui Zhang
Keyword(s):  
Satellite Orbit ◽  
Orbit Error ◽  
Geo Satellite

Geoid Determination and Gravity Works in Nepal

2018 ◽  
Vol 17 (1) ◽  
pp. 7-15
Author(s):  
Niraj Manandhar ◽  
Shanker K.C.
Keyword(s):  
Gravity Anomalies ◽  
Satellite Orbit ◽  
Surface Gravity ◽  
Gravity Measurement ◽  
Airborne Gravity ◽  
Geopotential Model ◽  
Geoidal Undulation ◽  
Factors Affecting ◽  
Gravity Observation ◽  
Best Fit

Gravimetric geoid plays the important role in the process of local/regional geoidal undulation determination. This approach uses the residual gravity anomalies determined by the surface gravity measurement using the gravimeter together with best fit geopotential model, with the geoid undulations over the oceans determined from the method of satellite altimetry. Mass distribution, position and elevation are prominent factors affecting the surface gravity. These information in combination with geopotential model helps in satellite orbit determination, oil, mineral and gas exploration supporting in the national economy. The preliminary geoid thus computed using airborne gravity and other surface gravity observation and the accuracy of computed geoid was likely at the 10-20cm in the interior of Nepal but higher near the border due to lack of data in China and India. The geoid thus defined is significantly improved relative to EGM –08 geoid.

User Range Error Analysis of Multiple Satellite Navigation System

2013 ◽  
Vol 411-414 ◽  
pp. 926-930
Author(s):  
Dong Hui Wang ◽  
Wen Xiang Liu
Keyword(s):  
Navigation System ◽  
Satellite Orbit ◽  
Satellite Navigation ◽  
Horizontal Direction ◽  
Detailed Calculation ◽  
Calculation Methods ◽  
Orbit Error ◽  
Satellite Navigation System ◽  
Ground Coverage ◽  
Range Error

User range error (URE) is widely used to measure the effects of satellite orbit error and clock error on user positioning. A detailed calculation method of URE was brought forward including the partitions of the ground coverage of the MEO satellites and the calculation methods of the projection parameters of URE. The different URE performance of multiple Satellite navigation system was analyzed. Simulation results show that the radial direction projection parameters are basically the same, but the horizontal direction projection parameters are different among GPS, Galileo and BDS. The higher the satellite orbit, the smaller the horizontal direction projection parameters.

scholarly journals Satellite Orbit Prediction Using Big Data and Soft Computing Techniques to Avoid Space Collisions

Mathematics ◽  
2021 ◽  
Vol 9 (17) ◽  
pp. 2040
Author(s):  
Cristina Puente ◽  
Maria Ana Sáenz-Nuño ◽  
Augusto Villa-Monte ◽  
José Angel Olivas
Keyword(s):  
Big Data ◽  
Soft Computing ◽  
Satellite Orbit ◽  
Orbit Error ◽  
Preliminary Stage ◽  
Soft Computing Techniques ◽  
Full Study ◽  
Data Arrangement ◽  
Estimated Error ◽  
Do So

The number of satellites and debris in space is dangerously increasing through the years. For that reason, it is mandatory to design techniques to approach the position of a given object at a given time. In this paper, we present a system to do so based on a database of satellite positions according to their coordinates (x,y,z) for one month. We have paid special emphasis on the preliminary stage of data arrangement, since if we do not have consistent data, the results we will obtain will be useless, so the first stage of this work is a full study of the information gathered locating the missing gaps of data and covering them with a prediction. With that information, we are able to calculate an orbit error which will estimate the position of a satellite in time, even when the information is not accurate, by means of prediction of the satellite’s position. The comparison of two satellites over 26 days will serve to highlight the importance of the accuracy in the data, provoking in some cases an estimated error of 4% if the data are not well measured.

Artificial satellite orbit computations

1966 ◽  
Vol 25 ◽  
pp. 363-371
Author(s):  
P. Sconzo
Keyword(s):  
Artificial Satellite ◽  
Satellite Orbit ◽  
Artificial Satellites ◽  
Orbital Elements ◽  
Differential Correction ◽  
Gravitational Effects ◽  
Short Intervals ◽  
The Subject ◽  
Introductory Discussion ◽  
Orbit Computation

In this paper an orbit computation program for artificial satellites is presented. This program is operational and it has already been used to compute the orbits of several satellites.After an introductory discussion on the subject of artificial satellite orbit computations, the features of this program are thoroughly explained. In order to achieve the representation of the orbital elements over short intervals of time a drag-free perturbation theory coupled with a differential correction procedure is used, while the long range behavior is obtained empirically. The empirical treatment of the non-gravitational effects upon the satellite motion seems to be very satisfactory. Numerical analysis procedures supporting this treatment and experience gained in using our program are also objects of discussion.

A Perturbation Theory for the Population of Atomic Energy Levels in Non-Lte Plasmas

1988 ◽  
Vol 102 ◽  
pp. 343-347
Author(s):  
M. Klapisch
Keyword(s):  
Perturbation Theory ◽  
Small Parameter ◽  
Classification Scheme ◽  
Sum Rules ◽  
Energy Levels ◽  
Natural Classification ◽  
Quantum Numbers ◽  
Formal Expansion ◽  
Atomic Energy Levels ◽  
As Effects

AbstractA formal expansion of the CRM in powers of a small parameter is presented. The terms of the expansion are products of matrices. Inverses are interpreted as effects of cascades.It will be shown that this allows for the separation of the different contributions to the populations, thus providing a natural classification scheme for processes involving atoms in plasmas. Sum rules can be formulated, allowing the population of the levels, in some simple cases, to be related in a transparent way to the quantum numbers.

Sign in / Sign up

Export Citation Format

Share Document