| /
| Level of available microgravity | Microgravity
duration | Information | Comments |
| ISS | 10-4
to 10-6G | Weeks to Months | | |
| Space
Shuttle | 10-3 to 10-5G | One
to two weeks | | |
| Mir | 10-3
to 10-5G | Weeks to Months | | Finished |
| Free flyer | Over
10-5G | Depends on mission duration (about six months) |
| Space Free-flyer Unit (SFU) for space experiments and observation
USEF Home Page | | Type carried by Space Shuttle (Finished) |
| | Type carried by spacecraft other than
the Shuttle |
| Small
rockets | 10-2 to 10-3G | Several
minutes | | Space experiments by small rockets and the results |
| Japan's TR-IA program was finished. |
| Aircraft | 10-2
to 10-3G | 10 to 25 seconds | | Possible |
| Drop
Tower | 10-3 to 10-4G | one to
ten seconds | | Possible |
