Research On Ionospheric Clutter For Shipborne HF Surface-wave Radar

Recently, shipborne HF surface-wave Radar takes more and more important placein the ocean observing field for its flexibility. But the ionospheric clutter occurs as aresult of non-ideality of antenna spanning on the flat roof, resulting in part ofwaves ‘leakage, this kind of inonspheric clutter interference restrict the shipborneHF surface-wave Radar detective performance seriously. So for the sake ofrestraining the inonspheric clutter effectively, we should really analyze theionospheric clutter characteristic more deeply.Base on this purpose,the article mainly comprise hereinafter content:First of all, the article will summarize the researching actualities about theshipborne HF surface-wave Radar and ionosphere at home and abroad.Secondly, the article will give elaborate introduce to the ionopheric basic physicalmechanism. The content of this part will involved ionospheric configuration、growing reason and complex changing identities, which will make sure everybodycan have all-sided acquaintanceship on basic physical knowledge of ionosphere.Simultaneity, by dint of R-D power resemble spectrum of ionospheric clutter, wecan find out the taking-up instance of ionospheric clutter on the dimension of rangeand doppler. Give the analyze to ionospheric diffusing characteristic as the wave’smedia in theory.Again, there’s a brief introduce to the working principle of shipborne HFsurface-wave Radar. Including working circumstance, information processing flowand principle on shipborne HF surface-wave Radar. As the former of shipborne HFsurface-wave Radar flat, we will proceed with signal prosessing arithmeteic of HFsurface-wave Radar on shore, and base on that,analyzing the speciality ofshipborne HF surface-wave Radar, besides that, the article will also introduce theDPCA signal processing technology which is used for the compensatory ofmovement.In the end, on the basis of the forming research, the article will utilize practicalmeasuring data to analyze the characteristic of ionospheric clutter as the importantreference index parameter on radar detective target, furtherly, the discuss will openout from these aspects: range, velocity, directivity characteristic and so on. Besides that, the radar emission frequency will be taken into account too, we’ll investigatethe influence which had happened on the ionospheric characteristic, so we hope thatthis work will provide a new thought for the radar frequency surveillance and themethod on ionospheric clutter surpressing.At last, we’ll compare severalsurpressing methods with practical data.