Accession Number : AD0430925


Title :   STATISTICAL STUDY TO ASCERTAIN THE VALIDITY OF THE AMR RADIO CIRCUIT PERFORMANCE SUMMARIES FOR HF RADIO OUTAGE,


Corporate Author : AEROSPACE CORP PATRICK AFB FLA


Personal Author(s) : Bagg,J L


Report Date : 29 Feb 1964


Pagination or Media Count : 32


Abstract : Radio circuit performance summaries make it appear that outage due to frequency fade or propagation difficulties was not randomly distributed for an extended time period. It is contended that outage was more likely to be recorded during a period near launch time as circuit monitoring and traffic were heavy while the monitoring effort between launches was less effective. To support this contention, available data for the P13D, P13U, and P26D transmission links were examined. The data examined were the number of quarter-hour outages in various time intervals before and after the launch times and also before and after a set of pseudo-launch times. This included a study of 27 launches and 25 pseudo launches. The statistical analysis was based upon the following assumptions: (1) If monitoring is continuous the actual number of quarter-hour outages during time intervals used in this study should be near the expected value; (2) if monitoring is heavier during launches, then the recorded outages would exceed the expected value; (3) if monitoring is lighter between launches it would be significantly below the expected value. The statistical hypothesis tested was that the actual number of quarter-hour outages should not differ significantly from the predicted theoretical outage based on outage data collected for 8 months. (Author)


Descriptors :   *FAILURE(MECHANICS) , RADIO EQUIPMENT , STATISTICAL ANALYSIS , RADIO EQUIPMENT , SAMPLING , LAUNCHING , FREQUENCY SHIFT , PROPAGATION , ATTENUATION , STATISTICAL DISTRIBUTIONS , TIME , RELIABILITY(ELECTRONICS) , MONITORS , TABLES(DATA)


Distribution Statement : APPROVED FOR PUBLIC RELEASE