A Self-Calibrating and Automatic Spectrum Electromagnetic Environment Monitoring System

Pulsars are a class of extremely stable rotation, electromagnetic radiation pulse neutron stars. There are three fronts pulsar research (find out more pulsars, carefully study known pulsar, as a probe to study the gravitational and the interstellar medium).And that makes radio astronomy observation needing more and more radio frequency bands. Radio observations, because of deep weak radio signals and its characteristics such as the high sensitivity, are susceptible to electromagnetic interference (Radio Frequency Interference, RFI) from the impact of human activities, which sometimes even cause fatal influence on the radio observations, therefore radio observations need an excellent electromagnetic environment site. The author uses the broadband noise source, 50 ohm matched load, low-high frequency antenna making up triple calibration monitoring system. In this paper, we monitor the system in different frequency (100MHz-18GHz) multiple azimuth and pitching angle, kinds of climates in the Ailao mountain ecological stations. And we elaborated the means of the statistical analysis of observed data. The system can be widely used in the field electromagnetic environment monitoring and radio telescope location, etc.