Back in the 1990s,a lunar simulant called JSC-1developed at JSC
JSC-1 in 1993, made of basaltic volcanic cinder cone deposits玄武岩火山灰沉积物from a quarry near Flagstaff, AZ
但因为there is no more JSC-1 available，所以researchers at Marshall are working with the Astromaterials Research and Exploration Science office at Johnson to create a replica of the JSC-1 simulant: JSC-1A.
MSFC马歇尔航天飞行中心 is developing three new simulants.
Source materials used to produce the three simulantswill potentially come from locations as diverse as Montana, Arizona , Virginia, Florida, Hawaii, and even some international sites. 我觉得特别要注意的就是不要把JSC-1和JSC-1A的时间、原材料、材料产地弄混。比如材料产地，JSC-1是AZ的采石场，而JSC-1A就是可能来自全美以及全球各地。