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19 results on '"Buist, Peter J."'

4. The right attitude: experimenting with GPS on board high-altitude balloons

Author

Buist, Peter J., Verhagen, Sandra, Hashimoto, Tatsuaki, Sawai, Shujiro, Sakai, Shin-Ichiro, Bando, Nobutaka, and Shimizu, Shigehito

Subjects
Sensor Systems Inc., Electromagnetic waves, Telecommunications equipment industry, Electromagnetic radiation, Electric waves, Telecommunications equipment industry, Business, Telecommunications industry, Institute of Space and Astronautical Science, Delft University of Technology
Abstract

IT IS NOT WIDELY RECOGNIZED that relative or differential positioning using GNSS carrier-phase measurements is an interferometric technique. In interferometry, the difference in the phase of an electromagnetic wave at [...]

Published
2011

14. Attitude determination of LEO satellites using an array of GNSS sensors.

Author

Nadarajah, Nandakumaran, Teunissen, Peter J. G., and Buist, Peter J.

Abstract

The proliferation of Global Navigation Satellite Systems (GNSS) paves the way for an increasing number of applications in positioning, guidance and navigation. GNSS-based attitude determination is one of such an important and promising application. In this contribution we explore the potential of GNSS-based attitude determination for Low Earth orbiting (LEO) formation flying Synthetic Aperture Radar (SAR) satellites. Precise attitude determination using multiple GNSS receivers/antennas relies on a successful resolution of the integer carrier phase ambiguities. For a set of rigidly satellite-mounted GNSS antennas, a number of nonlinear geometrical constraints can be exploited for the purpose of increasing the probability of correct integer ambiguity estimation. In this contribution, we make use of the Multivariate Constrained Least-squares AMBiguity Decorrelation Adjustment (MC-LAMBDA) method. By incorporating the known antenna geometry into its ambiguity objective function, this method is shown to demonstrate reliable and instantaneous single-frequency integer ambiguity resolution. The resulting attitude estimates are further improved using nonlinear filtering. Our hardware-in-the-loop experiment with the University of New Sourth Wales “Namuru” GNSS receivers shows the potential of stand-alone, unaided, single-frequency attitude determination of LEO satellites. [ABSTRACT FROM PUBLISHER]

Published
2012

18. On-board Data Processing for Earth and Atmospheric Observations.

Author

BUIST, Peter J. and VOLLMULLER, Bert-Johan

Subjects
ELECTRONIC data processing equipment, LASER atmospheric observations, ELECTRONIC data processing, ARTIFICIAL satellite equipment, DETECTORS, SYNTHETIC aperture radar, FOURIER transform spectrometers
Abstract

The next generation Earth and Atmospheric Observation satellites, such as BIOMASS, CoReH2O, PREMIER and METOP-SG, demands sensors with higher resolution and sensitivity, resulting in higher data volumes generated by the sensors, while the downlink capacity of the modern spacecraft does not increase with the same pace. A solution to this challenge is to perform more data compression or processing on-board the satellite. In this contribution, we will introduce a data processing board, coined On-board Payload Data Processing (OPDP), which could enable such onboard processing, especially for SAR and spectrometers. We will describe how data from this type of sensors could be processed by OPDP. [ABSTRACT FROM AUTHOR]

Published
2014

19. The Right Attitude.

Author

Buist, Peter J., Verhagen, Sandra, Hashimoto, Tatsuaki, Sawai, Shujiro, Sakai, Shin-Ichiro, Bando, Nobutaka, and Shimizu, Shigehito

Subjects
HOT air balloons, GLOBAL Positioning System, VEHICLES
Abstract

The article focuses on the Balloon-based Operation Vehicle (BOV) of Japan Aerospace Exploration Agency (JAXA) and the experiments conducted by the Delft University of Technology (DUT) using Global Positioning System (GPS). It mentions that JAXA's BOV was designed for microgravity research. The background of the theory of attitude determination is also included.

Published
2011

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