Long-distance propagation of 162 MHz shipping information links associated with sporadic E
Abstract 10 × 10 11 - 3 N m E s f o E s), though there are a few isolated reports of layers extending beyond 20 MHz (Chandra and Rastogi, 1975; Maeda and Heki, 2014). Here, we identify sporadic E layers using a huge database of 29 million 162 MHz automatic identification system (AIS) shipping transmissions collected over 3 d by a United States Coast Guard (USCG) terrestrial monitoring network in the eastern United States and Puerto Rico. Within this dataset, most (> 99 %) links are explained by line-of-sight, surface-wave, and tropospheric propagation, but a small population cannot be explained by these mechanisms. In total, 6677 signals were identified from ships located over 1000 km from the ground stations between 13 and 14 July 2021, and almost no long-distance links were received at night or at any time on 15 July. This coincides with intense (saturated) sporadic E in collocated ionosondes and in satellite radio occultation data. The density of these layers might exceed 27 MHz f o E s 9 × 10 12 - 3 N m E s. AIS transmissions potentially provide an excellent means of identifying dense sporadic E layers globally.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Long-distance propagation of 162 MHz shipping information links associated with sporadic E ; volume:15 ; number:21 ; year:2022 ; pages:6387-6393 ; extent:7
Atmospheric measurement techniques ; 15, Heft 21 (2022), 6387-6393 (gesamt 7)
- Creator
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Chartier, Alex T.
Hanley, Thomas R.
Emmons, Daniel J.
- DOI
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10.5194/amt-15-6387-2022
- URN
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urn:nbn:de:101:1-2022111004180131352304
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:36 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Chartier, Alex T.
- Hanley, Thomas R.
- Emmons, Daniel J.
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