Asteroid detection radar provides scientific data support for inversion of internal address structure and material composition by obtaining the reflection echo of strange medium on the surface and inside of the star. The detection method of asteroid companion determines that radar system can’t extract target echo form strong surface clutter without Doppler information in the detection process. At the same time, compared with Mars radar detection, resource constraints are more stringent, and the resolution are required higher. In this paper, a multi-point and multi-angle long time stepped frequency broadband synthetic detection scheme is creatively proposed, which effectively solves the contradiction between penetration depth and resolution, the SNR is not enough of sigle-pluse, and the extraction of target echo form strong clutter, etc., providing theoretical basis for the design of asteroid detection radar system.
The simultaneous imaging polarization camera (SIPC) is an instrument for simultaneous polarization measurement using a three-beam splitter prism. Due to the large number of polarizing devices in the SIPC, the parameters and responses of the polarizing devices are different, which causes the measurement matrix of the instrument to deviate from the ideal value. In order to ensure the polarization measurement accuracy of the SIPC, effective polarization calibration is required. In this paper, a standard linearly polarized light source is used to calibrate the SIPC. Firstly, the measurement matrix of the instrument is calibrated by using the linear polarization calibration source, and then the calibration parameters are obtained by fitting Fourier coefficients with least squares. Finally, the polarization measurement accuracy of the SIPC is verified by calibration experiments. The results show that the polarization measurement accuracy of the SIPC is better than 4% after polarization calibration.
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.