ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] Fig. 1. Precursor signal-levels. O, 108 Mc./s.; x, 162 Mc./s.; A, 211 Mc./s. In two cases, signals were first received when the satellite was 1,900-1,950 miles beyond the radio horizon point at orbit height. On these passes the satellite was roughly twice as far away as the distance to the ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/190708a0
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