苏联5月下旬在普列谢茨克导弹与空间中心第二次试验“MX型”的PL-4导弹(又称SSX-24),又未成功。 1982年10月26日第一次试验SSX-24固体推进剂多弹头洲际导弹时,第一级发生了故障。 苏联对SSX-24及更小的PL-5固体推进剂洲际导弹的遥测数据都编成了密码。第一次试验SSX-24时,95—98％的遥测数据是编码的。 PL-5导弹已于2月5日和5月5日做了两次飞行试验。两次试验全部或几乎全部 The Soviet Union’s second test of the MX-type PL-4 missile (also known as SSX-24) at the Plesetsk Missile and Space Center in late May failed again. When the SSX-24 solid propellant multi-warhead intercontinental missile was tested for the first time on 26 October 1982, the first-level fault occurred. Soviet Union telemetry data on SSX-24 and smaller PL-5 solid propellant intercontinental missiles were codified. At the first trial of SSX-24, 95-98% of the telemetry data was encoded. The PL-5 missile did two flight tests on February 5 and May 5. Test all or almost twice