Technology Readiness Level
From PicoSatPortal
[edit] NASA definition
| 9 | Actual system 'flight proven' through successful mission operations | 
|
| 8 | Actual system completed and 'flight qualified' through test and demonstration (ground or space) | |
| 7 | System prototype demonstration in a space environment | |
| 6 | System/subsystem model or prototype demonstration in a relevant environment (ground or space) | |
| 5 | Component and/or breadboard validation in relevant environment | |
| 4 | Component and/or breadboard validation in laboratory environment | |
| 3 | Analytical and experimental critical function and/or characteristic proof of concept | |
| 2 | Technology concept and/or application formulated | |
| 1 |
Basic principles observed and reported |
