Algorithm Description for LEO Precision Orbit Determination with Bernese v5.0 at CDAAC Overview
ثبت نشده
چکیده
Overview The COSMIC Data Analysis and Archival Center (CDAAC) at UCAR has processed radio occultation data from the GPS/MET, CHAMP, and SAC-C missions in post-processing and a near real time mode of operation for CHAMP. The GPS data processing at the CDAAC is performed with the Bernese v5.0 software package. The COSMIC mission requirement for LEO velocity uncertainty is 0.1 mm/s 3D rms. The recent upgrade of the Bernese software from version 4.3 to version 5.0 has improved the CDAAC CHAMP orbit quality from ~0.5 mm/sec 3D rms to approximately the 0.1 mm/sec level in post-processing, respectively. Bernese v5.0 is consistent with IERS 2000 conventions. In this document, the algorithms used for post-processed and near real-time precise orbit determination (POD) of LEO satellites at the CDAAC are described.
منابع مشابه
Determination of the best-fitting reference orbit for a LEO satellite using the Lagrange coefficients
Linearization of the nonlinear equations and iterative solution is the most well-known scheme in many engineering problems. For geodetic applications of the LEO satellites, e.g. the Earth’s gravity field recovery, one needs to provide an initial guess of the satellite location or the so-called reference orbit. Numerical integration can be utilized for generating the reference orbit if a satelli...
متن کاملPreparing for COSMIC: Inversion and Analysis of Ionospheric Data Products
The Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) is scheduled for launch in 2006. COSMIC will consist of six low earth orbiting satellites in planes separated by 24◦ to provide global atmospheric and ionospheric observations. One of the goals is to demonstrate near real-time processing of data products for numerical weather prediction and space weather applic...
متن کاملEffects of Some Parameters on Thermal Control of a LEO Satellite
Satellite thermal control ensures safe operating temperature ranges for satellite components throughout the mission life. Effects of altitude, spin, and position of satellite radiator(s) on the thermal control of a small Low Earth Orbit (LEO) satellite have been studied. Results show that change in satellite altitude, in the range considered here, does not produce critical thermal conditions. H...
متن کاملحفاظهای چندلایه در مدار LEO
LEO orbit space radiations in which the protons has the main contribution, have survived devastating effects on electronic components. The damage caused by ionizing protons on the satellite electrical components in the circuit LEO moves was reviewed. By studying the LEO orbit by Shieldose software, the worst-case scenario was evaluated for a satellite. Considering the electronic components base...
متن کاملFit to targets, preferred listening levels, and self-reported outcomes for the DSL v5.0 a hearing aid prescription for adults.
STUDY OBJECTIVE This study evaluated how closely the DSL v5.0 a prescription could be approximated with hearing aids, its relationship to preferred listening levels (PLLs) of adults with acquired hearing loss, and the self-reported outcomes of the resulting fittings. PARTICIPANTS Thirty adults with varying degrees and configurations of hearing loss ranging from mild to severe. METHODS Heari...
متن کامل