What are these beams sticking out of the Su-17's nose?
conical nose reminded of its predecessor as much as the MiG-21, and ended with two long poles, one of which contained the very classic Pitot tube and the second a fire control calculator.


Source :https://www.avionslegendaires.net/avion-militaire/sukhoi-su-17-20-22-fitter/


  Two protuberances extended the nose: a Pitot tube and above all a pole supplying measurements to an ASP-5ND fire control system


Source:https://aviationsmilitaires.net/v3/kb/aircraft/show/2208/sukhoi-su-17-otan-fitter