{"title":"台卡频率传输在海冰上的传播速度","authors":"D. H. Gray","doi":"10.1139/TCS-1975-0036","DOIUrl":null,"url":null,"abstract":"In April and August 1973, a phase lag comparison test was performed using a double monitor system with the hyperbolic Decca chain established for various scientific surveys in the Amundsen Gulf. The test compared the secondary phase lag effect of sea ice and sea water. The observed values of the August test over sea wafer are consistent with the theoretical formulas of J.R. Johler. The observed values of the April test over sea ice cannot be compared with the formulas because the formulas are based on the assumption of a vertically homogeneous medium and this assumption is not valid in a sea-ice situation. The observed average velocity over sea ice is 299 510 km/sec and over sea water is 299 610 km/sec.","PeriodicalId":284729,"journal":{"name":"International Hydrographic Review","volume":"31 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1975-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"The Propagation Velocity of Decca-Frequency Transmissions over Sea Ice\",\"authors\":\"D. H. Gray\",\"doi\":\"10.1139/TCS-1975-0036\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In April and August 1973, a phase lag comparison test was performed using a double monitor system with the hyperbolic Decca chain established for various scientific surveys in the Amundsen Gulf. The test compared the secondary phase lag effect of sea ice and sea water. The observed values of the August test over sea wafer are consistent with the theoretical formulas of J.R. Johler. The observed values of the April test over sea ice cannot be compared with the formulas because the formulas are based on the assumption of a vertically homogeneous medium and this assumption is not valid in a sea-ice situation. The observed average velocity over sea ice is 299 510 km/sec and over sea water is 299 610 km/sec.\",\"PeriodicalId\":284729,\"journal\":{\"name\":\"International Hydrographic Review\",\"volume\":\"31 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1975-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Hydrographic Review\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1139/TCS-1975-0036\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Hydrographic Review","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1139/TCS-1975-0036","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The Propagation Velocity of Decca-Frequency Transmissions over Sea Ice
In April and August 1973, a phase lag comparison test was performed using a double monitor system with the hyperbolic Decca chain established for various scientific surveys in the Amundsen Gulf. The test compared the secondary phase lag effect of sea ice and sea water. The observed values of the August test over sea wafer are consistent with the theoretical formulas of J.R. Johler. The observed values of the April test over sea ice cannot be compared with the formulas because the formulas are based on the assumption of a vertically homogeneous medium and this assumption is not valid in a sea-ice situation. The observed average velocity over sea ice is 299 510 km/sec and over sea water is 299 610 km/sec.
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