appropriate Raytheon task managers. For items outside the the purview of MPTS the assessment was made, primarily for the impact on the MPTS, through discussions with the Grumman task manager and limited discussions with NASA personnel having responsibilities in the appropriate field. From the results of these discussions, a ranking of the most critical items was established and displayed in the upper right corner for the item. It may be that a more in-depth investigation of the power source, flight operations, operations and maintenance, and particularly socio-economic considerations would result in a change Of ranking. However, until the technology for the more critically ranked items is pursued and favorable results are forthcoming, emphasis should be applied according to the ranking shown. Further in-depth studies and technology developments should be conducted and periodic re-ranking should be done as a function of study findings and technology development results both favorable and unfavorable. The method used in obtaining this assessment was to: a. Ask a broad set of questions of the task managers for the MPTS study. b. Ask the task managers to rate the several areas of technology against the criteria and discuss or show by the use of schematics and block diagrams the features wherein the areas of technological concern are greatest. c. Review the responses, clarify assumptions and modify ratings as appropriate. d. Prepare a uniform set of discussion narratives for each of the less mature items and, based on these narratives, rank them in descending order of program risk. It was concluded from a list of 24 critical items that the areas which should receive attention with most urgency in the MPTS technology program are: a. dc to rf converters and filters b. Materials c. Phase control subsystems d. Waveguide e. Structure
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