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Table 1 Spacecraft surface characteristics sampled during this study

From: Application of the ATP assay to rapidly assess cleanliness of spacecraft surfaces: a path to set a standard for future missions

Spacecraft surface Sample location Final accountable sample Zone name Date Spacecraft surface sampled Number of samples tested for NSA Number of samples tested for ATP
Flight samples
Backshell and balance mass device KSC Y Backshell 6/6/11 15 10 10
Spacecraft stack  KSC Y Backshell 9/20/11 38 4 9
Spacecraft stack prior to encapsulation KSC Y Backshell 10/8/11 16 6 2
Descent pre-closeout KSC Y Descent stage 8/12/11 37 94 32
Spacecraft stack  KSC Y Descent stage 9/16/11 72 41 62
Descent stage electronics JPL Y Descent Stage 4/5/11 7 6 6
Spacecraft stack prior to encapsulation KSC Y Heatshield 10/8/11 21 6 21
Rover pre-closeout KSC Y Rover 8/10/11 53 31 34
Spacecraft stack KSC Y Rover 9/20/11 70 54 55
Spacecraft stack prior to encapsulation KSC Y Rover 10/8/11 23 20 18
Non-flight samples
Descent stage JPL N Descent stage 3/7/08 20 20 20
Rover interior JPL N Rover 5/20/08 18 18 18
Launch vehicle isolation diaphragm KSC N Non-flight 10/27/11 10 10 10
Total number of samples analyzed for accountable flight assays      400 320 297