# Measurement technique of turbulence characteristics from jitter of astronomical images onboard an aircraft: Part 2. Accounting for photoreceiver response time

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## Abstract

The main theoretical relations required by the technique for measuring turbulence characteristics from the jitter of astronomical images onboard a flying aircraft are derived. Monostatic and differential (bistatic) receivers are compared. The analysis does not repeat the analysis of signals and errors of the common differential method. The technique suggested supposes operation from a moving carrier. It is shown that the maximum deviation of the bistatic response function from the monostatic response function is observed when the velocity vectors of the carrier and the channel spacing are collinear. The effects of the turbulence outer scale, the vector carrier velocity, sampling frequencies, and other parameters of the instrument scheme are estimated. In particular, it is found that the typical correlation time in a bistatic differential receiver depends on the transportation time of turbulent inhomogeneities between two receiving channels until the distance between them is less than the turbulence outer scale.

## Keywords

Turbulence Characteristic Turbulent Atmosphere Outer Scale Time Correlation Function Astronomical Image## Preview

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