D. Howe, D. W. Hanson, J. Jespersen, M. Lombardi, W. Klepczynski, P. Wheeler, M. Miranian, W. Powell, J. Jeffries, A. Myers
{"title":"使用双向卫星时间传输的NIST-USNO时间比较","authors":"D. Howe, D. W. Hanson, J. Jespersen, M. Lombardi, W. Klepczynski, P. Wheeler, M. Miranian, W. Powell, J. Jeffries, A. Myers","doi":"10.1109/FREQ.1989.68864","DOIUrl":null,"url":null,"abstract":"Time comparison data between UTC US Naval Observatory (USNO) and UTC US National Institute of Standards and Technology (NIST) is presented along with some analysis of that data. Second-to-second raw difference data is white and with no discernible slope for a 300-s measurement; a simple mean is computed for the value of the time comparison. Long-term sigma /sub y/( tau ) results are consistent with expected results of a comparison between NIST and USNO, and in-cabinet loop tests of the two-way satellite equipment point to system noise being a factor of 10 below the stability of these results. Therefore the noise contribution due to the two-way time transfer method is assumed to be negligible. The results show that the measurement time could be reduced from 300 s to 100 s with little or no compromise in precision even with a C/N/sub 0/ as low as 55 dB-Hz.<<ETX>>","PeriodicalId":294361,"journal":{"name":"Proceedings of the 43rd Annual Symposium on Frequency Control","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1989-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":"{\"title\":\"NIST-USNO time comparisons using two-way satellite time transfers\",\"authors\":\"D. Howe, D. W. Hanson, J. Jespersen, M. Lombardi, W. Klepczynski, P. Wheeler, M. Miranian, W. Powell, J. Jeffries, A. Myers\",\"doi\":\"10.1109/FREQ.1989.68864\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Time comparison data between UTC US Naval Observatory (USNO) and UTC US National Institute of Standards and Technology (NIST) is presented along with some analysis of that data. Second-to-second raw difference data is white and with no discernible slope for a 300-s measurement; a simple mean is computed for the value of the time comparison. Long-term sigma /sub y/( tau ) results are consistent with expected results of a comparison between NIST and USNO, and in-cabinet loop tests of the two-way satellite equipment point to system noise being a factor of 10 below the stability of these results. Therefore the noise contribution due to the two-way time transfer method is assumed to be negligible. The results show that the measurement time could be reduced from 300 s to 100 s with little or no compromise in precision even with a C/N/sub 0/ as low as 55 dB-Hz.<<ETX>>\",\"PeriodicalId\":294361,\"journal\":{\"name\":\"Proceedings of the 43rd Annual Symposium on Frequency Control\",\"volume\":\"1 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1989-05-31\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"7\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of the 43rd Annual Symposium on Frequency Control\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/FREQ.1989.68864\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the 43rd Annual Symposium on Frequency Control","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/FREQ.1989.68864","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
NIST-USNO time comparisons using two-way satellite time transfers
Time comparison data between UTC US Naval Observatory (USNO) and UTC US National Institute of Standards and Technology (NIST) is presented along with some analysis of that data. Second-to-second raw difference data is white and with no discernible slope for a 300-s measurement; a simple mean is computed for the value of the time comparison. Long-term sigma /sub y/( tau ) results are consistent with expected results of a comparison between NIST and USNO, and in-cabinet loop tests of the two-way satellite equipment point to system noise being a factor of 10 below the stability of these results. Therefore the noise contribution due to the two-way time transfer method is assumed to be negligible. The results show that the measurement time could be reduced from 300 s to 100 s with little or no compromise in precision even with a C/N/sub 0/ as low as 55 dB-Hz.<>
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
