The impact of the proposed Arecibo Observatory upgrade on middle atmosphere research

Abstract

There are at present three radar frequencies that are being ex­ploited: 50, 430 and 2380 MHz. (In addition, there is a range of HF frequencies in a bi-static mode, using the Heating Facility to illuminate, but which we will not discuss here, since there would be no benefits to be derived from the upgrading.) The proposed upgrading of the Arecibo 300 meter antenna will benefit the research work in the three regions of the atmosphere we have mentioned above through improved performance in the three existing radars, including multifrequency operation.