Engineering topics
Kuang, D.
Publications and source records attributed to Kuang, D..
New empirically-derived solar radiation pressure model for GPS satellites
Solar radiation pressure force is the second largest perturbation acting on GPS satellites, after the gravitational attraction from the Earth, Sun, and Moon. It is the largest error source in the modeling of GPS orbital dynamics.
New empirically-derived solar radiation pressure model for GPS satellites
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TOPEX/JASON combined GPS/DORIS orbit determination in the tandem phase
This paper will present Jason-1 POD results obtained at JPL using the Gipsy-Oasis I1 (GOA). Results from standard tests (orbit overlaps, Laser control points) suggest that 1 to 2 cm radial orbit precision is already being achieved using the JPL reduced-dynamic filter approach. New DORIS POD strategies will be an emphasis of this paper.
GRACE: millimeters and microns in orbit
The Gravity Recovery and Climate Experiment launched March 17, 2002. The GPS data for this experiment are processed to contribute to the recover long wavelength gravity field; remove errors due to long term on-board oscillator drift; and align K/Ka-band measurments between the two spacecraft to 0.1 ns. This paper will concentrate on the use of GPS for these timing and calibration functions and will not address the recovery of the gravity field.
Intial orbit determination results for Jason-1: towards a 1-cm orbit
The U.S/France Jason-1 oceanographic mission is carrying state-of-the-art radiometric tracking systems (GPS and Doris) to support precise orbit determination (POD) requirements. The performance of the systems is strongly reflected in the early POD results. Results of both internal and external (e.g., satellite laser ranging) comparisons support that the 2.5 cm radial Rh4S requirement is being readily met, and provide reasons for optimism that 1 cm can be achieved. We discuss the POD strategy underlying these orbits, as well as the challenging issues that bear on the understanding and characterization of an orbit solution at the l-cm level. We also describe a system for producing science quality orbits in near real time in order to support emerging applications in operational oceanography.
An emerging new direction in remote sensing for Earth science: the technology of GPS occultations
In this paper, we discuss recent technology developments that improve science return in the lowest 5 km of the atmosphere, an interesting region that is difficult to sound at high vertical resolution with other techniques from space.
An emerging new direction in remote sensing for Earth science: the technology of GPS occultations
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An overview of CHAMP radio occultation analysis at JPL
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GPS-assisted GLONASS orbit determination
Using 1 week of data from a network of GPS/ GLONASS dual-tracking receivers, 15-cm accurate GLONASS orbit determination is demonstrated with an approach that combines GPS and GLONASS data.
Precise orbit determination for CHAMP using GPS data from BlackJack Receiver
In this paper we present results for CHAMP POD using the precise GPS measurements collected by the BlackJack receiver through the up-looking antenna. We will describe the quality of the tracking data, the tuning of the reduced-dynamic model for the 400-km orbit, and the various methods of evaluating the orbit accuracy.
Precise CHAMP orbit determination with GPS tracking
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Precise orbit determination for the shuttle radar topography mission using a new generation of GPS receiver
The BlackJack family of GPS receivers has been developed at JPL to satisfy NASA's requirements for high-accuracy, dual-frequency, Y-codeless GPS receivers for NASA's Earth science missions. In this paper we will present the challenges that were overcome to meet this accuracy requirement. We will discuss the various reduced dynamic strategies, Space Shuttle dynamic models, and our tests for accuracy that included a military Y-code dual-frequency receiver (MAGR).
Position and Attitude Determination in Space with Autonomous Formation Flyer (AFF)
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Position and Attitude Determination in Space with Autonomous Formation Flyer (AFF)
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Positioning with Autonomous Formation Flyer (AFF) on Space-Technology 3
The NASA's Space Technology 3 mission (ST-3) will demonstrate, among others, the newly developed Autonomous Formation Flyer (AFF) technology.