At present, there are many theory analysis on the cat eye characteristics of different targets, but the experiment for cat eye characteristics measurement of dynamic sky target has not been reported. In order to validate the feasibility of the detection of the cat eye effect of the sky target through active laser, an experiment for cat eye characteristics measurement of sky target is designed and put into practice. Firstly, based on the theory analysis of the cat eye characteristics of the sky target, a scheme of the experiment for cat eye characteristics measurement is designed. Then the main technology difficulties of the experiment and correspondingly resolving methods are brought forward, and the experiment is put into practice through the flow. Finally, a cat eye characteristics index is brought forward to analyse the measurement data, which can give a suitable evaluation to the implementation of the experiment. The experiment result indicates that the detection of the cat eye effect of the sky target through active laser is feasible.
The Modulation Transfer Function (MTF) is an analysis method of a telescope in the frequency regime, which can estimate the telescope imaging effect through spatial resolution power. Traditional detecting ability studies on a telescope is based on the signal-to-noise ratio (SNR). This cannot analyze the factors affecting detection ability and spatial resolution simultaneously, such as the atmospheric coherence length, the image motion and the aberrations. A new method on the detecting ability evaluation of a telescope is presented in this article, which is based on SNR and MTF. It can compensate for the deficiency of the traditional evaluation method, and can analyze the effective of image motion, aberrations and atmospheric coherence length. It can also be used to analyze a telescope with an adaptive optics system. The simulation results indicate that the detecting ability of a telescope is influenced serious by an image motion, some aberrations or the atmospheric coherence length. The detecting ability reduces about 0.5 magnitudes by image motion, which can improve 1 magnitude through an adaptive optics technology.
Due to the limitation of satellite payload performance and the influence of space environment, large-capacity information transmission between satellites has always been a key difficulty in the field of inter-satellite information transmission. Laser communication has the characteristics of fast transmission rate and large information capacity, which is very suitable for large-capacity inter-satellite information transmission. This article introduces the related concepts of laser communication, investigates the development status of space laser communication and laser communication relay system, briefly introduces the representative laser communication satellite system, and summarizes the advantages and disadvantages of laser communication. The inter-satellite laser communication relay system is designed based on two different application scenarios. The inter-satellite distance and information transmission window are simulated based on the SGP4 model to verify the feasibility of the relay system to extend the inter-satellite laser communication. The engineering realization of the follow-up system has a certain meaning.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.