Picosecond Laser Pulse Distortion by Propagation through a Turbulent Atmosphere

Procházka, Ivan; Kral, Lukas; Blazej, Josef

doi:10.5772/13511

Cited by 1 publication

(3 citation statements)

References 11 publications

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“…This method depends on an initial tropospheric zenith wet delay with a proper mapping function m, the structure constant C n (2.4), the saturation length scale L, and the wind speed v as input parameters [47]. The modeling of optical turbulence was based on Prochazka's 2010 publication [50]. In this work, it was possible to measure the influence of tropospheric turbulence on different laser frequencies for the first time.…”

Section: Turbulencementioning

confidence: 99%

“…In this work, it was possible to measure the influence of tropospheric turbulence on different laser frequencies for the first time. The measured changes in delay even reached several centimeters [50]. The analysis was based on a model developed by Gardner et al [51] used to determine exact fluctuations.…”

Section: Turbulencementioning

confidence: 99%

“…With the appropriate assumptions about the values of various parameters, the approach used in Prochazka's work can also be used for simulations. These parameters are the initial tropospheric zenith dry delay with the appropriate mapping function m, the structure constant C n (from the Hufnagel-Valley model [52]), the outer scale of the turbulence L 0 , the wavelength of the laser λ, the optical wave number κ, and the one-way target distance L as input parameters [50]. As mentioned above, the effect of tropospheric fluctuations on an electromagnetic observation is similar to that of colored measurement noise.…”

Section: Turbulencementioning

confidence: 99%

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Colocation in Time and Space of High-Precision Two-Way Optical and Microwave Observations for Calibration of a Microwave Ranging Link—The ACES Mission Case

Vollmair,

Schlicht,

Hugentobler

2023

Remote Sensing

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The ACES mission of the European Space Agency combines optical and microwave-based geodetic observation techniques with highly accurate atomic clocks to achieve a new level of accuracy for geodesy and fundamental physics applications. In addition, the combination of two high-precision measurement techniques provides an even more exciting insight into their errors. Fundamental physics is particularly interested in experiments that require high precision between the results of the successive passes of a satellite. An example of such an experiment is the determination of gravitational redshift. Geodesy applications, in contrast, require both high accuracy and precision. Especially for applications like precise ranging or time synchronization, all possible error influences must be characterized and determined with high precision. Therefore, electronic delays of microwave link terminals pose a challenge to achieving high accuracy. They must, therefore, be calibrated, and the stability of the electronic delays must be monitored. While optical observation techniques can be calibrated sufficiently on the ground, the calibration of microwave measurements before a launch is not precise enough, and continuous monitoring is also not possible. In this study, four calibration methods were tested, all based on colocating optical and microwave measurements onboard a satellite and on the ground. The results of two methods achieved the required accuracy of 100 ps for time synchronization, with a mean error and standard deviation of better than 4 ps and 55 picoseconds, respectively. Correlations between the measured parameters were identified, and the impact of the different approaches on accuracy was investigated. It will be shown that the satellite-based colocation of two different geodetic observation techniques has clear advantages, and the calibration results achieved the required accuracy for geodetic applications in this simulation study.

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Section: Turbulencementioning

confidence: 99%

Section: Turbulencementioning

confidence: 99%