But some other performances of cell phone jammer

But some other performances of cell phone jammer need to be adjusted.
However, this effect is very small and can be ignored. Horizontal distance measurement can reach a very high accuracy in the measurement range is not very long, but for the vertical distance measurement, the situation is completely different, as altitude increases, the gravity weakened , and the temperature is reduced accordingly, and thus the atmospheric density with height increase gradually become thin, the refractive index distribution can no longer be regarded as constant. ground refractive index to calculate the speed of light propagation in the atmosphere, its value than the true value is smaller The corresponding calculated distance value will be less than the actual value. Airborne Laser Ranging according to weather conditions to determine the refractive index is a pressing problem. rough target detection performance of the system impact of airborne laser ranging system Using laser to illuminate the target. The commission process of mobile phone jammer  is complicated.
To obtain distance information depends on receiving the backscattered signal, the reflection rate and the target structure of the morphology (height and slope of the distribution of information in a single laser spot) most of the goals, such as ground, forest, rock is relatively coarse, especially in the optical wavelength scale to measure the roughness of these goals. light field in the receiver plane at any point is different from the target scattering Motoko wave coherent superposition, the light intensity in disordered spots shaped distribution, the intensity distribution of the target surface roughness is closely related to the 9.3 threshold to select detect echoes need to consider the laser ranging system, how to select the threshold of detection of the echo is a problem worthy of study. The log of cell phone jammer should be kept well by the related unit.
The level tube is the most common type of detector in the laser echo detection in airborne laser ranging system, with its echo detection need to consider the following questions: (1) background noise, circuit noise, and avalanche diode shot noise caused by the pulsed laser ranging system mistakenly target detection or leak detection target. (2) the threshold of the detection system, select the system's detection performance impact, if the threshold is selected to obtain small, will lead to increased probability of false alarm (3); the threshold is selected to obtain large, will result in leakage detection probability increases.