AU | astronomical unit |
aw | water activity |
C | Celsius |
CDR | Critical Design Review |
COSPAR | Committee on Space Research |
EDL | Entry, Descent, and Landing |
HDBK | Handbook |
KDP | Key Decision Point |
NPD | NASA Policy Directive |
NPR | NASA Procedural Requirements |
NRC | National Research Council |
PDR | Preliminary Design Review |
PP | Planetary Protection |
PPO | Planetary Protection Officer or designee |
PQAP | Planetary Quarantine Advisory Panel |
SMD AA | Associate Administrator for the Science Mission Directorate |
SRF | sample-receiving facility |
SSB | Space Studies Board |
TBD | to be determined |
U.S.C. | United States Code |