莫斯科时间2015年12月21日,联盟-2.1a(Soyuz-2.1a)火箭从哈萨克斯坦境内的拜科努尔发射场点火起飞,执行新型货运飞船进步MS-01(Progress MS-01)的发射任务。该飞船首次执行向“国际空间站”(ISS)补给货物的任务。2015年4月进步M-27M飞船发生严重故障后,俄罗斯相关专家对火箭和飞船进行了详尽的排查和硬件的修改,本次联盟-2.1a运载火箭和“进步”飞船分离过程十分顺利。12月23日,进步MS-01 Moscow time On December 21, 2015, the Soyuz-2.1a rocket took off from the Baikonur launch site in Kazakhstan to launch a new cargo spacecraft to enhance the launch of MS-01 (Progress MS-01) task. The spacecraft is the first to carry out the task of replenishing its cargo to the International Space Station (ISS). April 2015 Progress After the serious failure of the M-27M spacecraft, Russian experts conducted a detailed investigation of the rocket and spacecraft and modified the hardware. The separation process between the US-2.1a launch vehicle and the Progressive spacecraft went smoothly . December 23, to improve MS-01