The invention discloses a double-mode compound rocket sonde. The two positioning technologies of radar and satellite navigation and the data collected by satellite navigation are used, the problem ofinsufficient measurement angle and slant range accuracy of a meteorological radar measurement system is overcome, and the accuracy of detection data can be significantly improved. A rocket sonde of anavigation satellite measurement system has the disadvantages of instable performance, easy lock-lose of positioning and large influence of weather on satellite reception, compensation is carried outthrough the tracking and positioning of a meteorological radar, and the reliability of an overall detection system can be greatly improved. The positioning technologies of radar and satellite navigation are used, the obtained positioning data complement each other and verify each other, the calculation accuracy of the detection data is improved, and the credibility of the detection data is improved.