HQ-19 - A vastly upgraded version of HQ-9 to counter ballistic missile and satellites (ASAT) on the lower end of Low Earth orbits, and it is the Chinese equivalent of THAAD.[22] HQ-19 is armed with a dual purpose exosphere kinetic kill vehicle (kkv) warhead designed by a team led by Professor Zhou Jun (周军), which can be used against ballistic missile warheads or satellites.[23] Its first flight occurred in 2003; since then, the missile has conducted several other tests, including one on 1 November 2015.[24][25] SC-19 - HQ-19 derivative using Kaituozhe-1 space booster as engine instead of the original engine used in HQ-9/19. Due to the size difference of engines, SC-19 also has to adopt a new launcher/transporter designated as KT-409.[26] Like HQ-19, SC-19 can also be used to counter either ballistic missile or satellite on the lower end of low Earth orbits.