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Extensive light curve database of Astronomical Institute of the University of Bern
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TLDR
In this paper, the authors discuss the photometry observation techniques currently in use by the Astronomical Institute of the University of Bern (AIUB) and at the Zimmerwald observatory and present the processing of light curves with the aim to determine apparent spin periods of observed objects and to reconstruct their folded phase functions.Abstract:
Our paper will discuss the photometry observation techniques currently in use by the Astronomical Institute of the University of Bern (AIUB) and at the Zimmerwald observatory. We present the processing of light curves with the aim to determine apparent spin periods of observed objects and to reconstruct their folded phase functions. We will summarize spin rates for 397 objects extracted from 1991 light curves which were acquired with the ZIMLAT telescope during the last ten years. More than dozen of defunct spacecraft showed a periodic change of the apparent spin rates over time. These cases will be briefly discussed.read more
Citations
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Attitude State Evolution of Space Debris Determined from Optical Light Curve Observations
TL;DR: In this paper, the authors used the 1-meter telescope ZIMLAT at the Astronomical Institute of the University of Bern (AIUB) to collect light curves of selected LEO, MEO and GEO objects on a regular basis.
Space debris attitude determination of faint LEO objects using photometry: SwissCube’s cubesat study case
Jean-Noël Pittet,Jiri Silha,Thomas Schildknecht,Muriel Richard,D.H. Antal,Christophe Paccolat,V. Gass,J.P. Thiran +7 more
TL;DR: The observation (photometry and radio signal) and the data processing techniques in the first section are presented and the SwissCube sensors and their configuration in the Cube are described, especially for SwissCube spin rates greater than 6 deg/sec.
Use of a night-tracking camera for characterization and orbit improvement of defunct spacecraft
TL;DR: In this article, the authors used a night-tracking camera for real-time correction of the pointing of the SLR system (active tracking), and for simultaneous acquisition of measurements used to improve the orbits and to study the attitude of the target.
Posted Content
Use of a Night-Tracking Camera for Characterization and Orbit improvement of Defunct Spacecraft
TL;DR: A way to overcome the mentioned challenges is shown by using a night-tracking camera for the real time correction of the pointing of the SLR system (active tracking), and for the simultaneous acquisition of measurements used to improve the orbits and to study the attitude of the target.
DissertationDOI
GPS time-variable seasonal signals modeling
TL;DR: The results show that singular spectrum analysis could be a viable and complementary tool for exploring modulated oscillations from GPS time series and looks into the effects of the input noise variances in the framework of Kalman filtering.
References
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Journal ArticleDOI
Optical observations of space debris in GEO and in highly-eccentric orbits
Thomas Schildknecht,Reto Musci,Martin Ploner,Gerhard Beutler,W. Flury,J. Kuusela,J. de Leon Cruz,L. de Fatima Dominguez Palmero +7 more
TL;DR: The geostationary transfer orbit (GTO) survey as discussed by the authors was the first attempt to estimate the number of small-size objects in GEO, with diameters as small as ten centimeters.
Journal ArticleDOI
Parameter estimation in epoch folding analysis
Abstract: We describe a procedure that we have implemented to use epoch folding to estimate pulse period, shape, amplitude and phase (with uncertainties) for coherent oscillations in time series data. We improve on traditional techniques by fitting the as a function of test period with a response function which takes into account both data sampling and the oscillation pulse shape. It is shown that the epoch folding procedure makes optimum usage of the full pulse shape information, or equivalently all its Fourier components, in the period determination. An analytic expression for the period error is also given for this general, non-sinusoidal, case. The error estimate, which is equivalent to that for a least-squares fit of a set of harmonically related Fourier components, is verified by Monte Carlo simulations.
Extraction of spin periods of space debris from optical light curves
TL;DR: In this paper, the authors presented the reconstructed phase and its evolution over time of a High-Area-to-Mass-Ratio (HAMR) object, which they observed for several years.
Improved Space Object Observation Techniques Using CMOS Detectors
TL;DR: In this paper, the authors evaluated the performance of active pixel sensors (APS) for space object detection and image segmentation in real-time and compared it with CCDs.
Journal ArticleDOI
An optical survey for space debris on highly eccentric and inclined MEO orbits
TL;DR: In this article, different survey and follow-up strategies for searching space debris objects in highly-eccentric MEO orbits, and to acquire orbits which are sufficiently accurate to catalog such objects and to maintain their orbits over longer time spans were developed.
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