Numerical Noise In Satellite Laser Ranging
Data Processing
Author(s)
J. Blazej & I. Prochazka
Abstract
Satellite laser ranging is a highly accurate measuring technique providing the
accurate range to the retroreflector equipped Earth satellites. It operates on a
classical radar principle. Measuring the time interval between the pulse
transmittal and reception, and considering the speed of light and the way of its
propagation, the target distance may be evaluated. The picosecond laser pulses
together with highly precise timing systems and optical detectors enable
resolution and accuracy of the entire ranging system to an accuracy of several
millimetres. To demonstrate the ultimate precision of satellite laser ranging two
different and independent algorithms were used for ranging data processing. The
internal consistency and the numerical noise of the data reduction, fitting and
normal point forming procedure have been tested. The completed experiment
demonstrates the ultimate normal point precision at the level of 2.5 picoseconds,
that corresponds to 0.37 mm in the range of the retroreflector equipped satellite
in space. The key contributor to this value is the interpolation used in the satellite
orbit modelling procedure.
Keywords: picosecond ranging, orbit modelling.
1 Introduction
The testing of precision limits of algorithms used is interesting for any technique
whose precision during recent years is improving by technology reasons without
changing of the data processing algorithm. One of these is the Satellite Laser
Ranging (SLR). The SLR is a highly accurate measuring technique providing
accurate range to retroreflector equipped Earth satellites. It operates on a
classical radar principle. Measuring the time interval between the pulse
transmission and reception and considering the speed of light and the way of its
Keywords
picosecond ranging, orbit modelling.
Related Book
Other papers in this volume
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