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Assessment of the probability of contaminating mars
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Judd, B. R. Pezier, J. P. North, D. W. |
| Copyright Year | 1974 |
| Description | New methodology is proposed to assess the probability that the planet Mars will by biologically contaminated by terrestrial microorganisms aboard a spacecraft. Present NASA methods are based on the Sagan-Coleman formula, which states that the probability of contamination is the product of the expected microbial release and a probability of growth. The proposed new methodology extends the Sagan-Coleman approach to permit utilization of detailed information on microbial characteristics, the lethality of release and transport mechanisms, and of other information about the Martian environment. Three different types of microbial release are distinguished in the model for assessing the probability of contamination. The number of viable microbes released by each mechanism depends on the bio-burden in various locations on the spacecraft and on whether the spacecraft landing is accomplished according to plan. For each of the three release mechanisms a probability of growth is computed, using a model for transport into an environment suited to microbial growth. |
| File Size | 3749689 |
| Page Count | 165 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19740018186 |
| Archival Resource Key | ark:/13960/t4qk2656n |
| Language | English |
| Publisher Date | 1974-04-01 |
| Access Restriction | Open |
| Subject Keyword | Space Sciences Mars Environment Microorganisms Microbiology Growth Probability Theory Mars Planet Viking Lander Spacecraft Contamination Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
