Accession Number:

ADA112648

Title:

UHF Maritime Scintillation Measurements during SOS 1981. A Quick-Look Report.

Descriptive Note:

Memorandum rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

Report Date:

1982-03-30

Pagination or Media Count:

35.0

Abstract:

Between 1 January and 15 April 1981, investigators at the Naval Research Laboratory participated in a comprehensive Study of Scintillation SOS 81 in the American longitude zone using radio receivers installed aboard the US Navy Research Ship USNS Hayes T-AGOR-16. Both UHF and L-band data were obtained using the transmission from the Atlantic FLTSATCOM and from the existing complement of NAVSTARGPS satellites respectively. This report describes the UHF scintillation data obtained during the Hayes expedition which covered geographic latitudes between 35 deg N and 50 deg S with considerable concentration in the Southern Hemisphere. Strong scintillation at 250 MHz was observed or 20dB in the vast majority of nocturnal periods for which the magnetic dip angle I was within or - 40 deg of the magnetic dip equator. This corresponds to roughly or - 30 deg in geomagnetic latitude. This suggests that a substantial expansion in the equatorial UHF scintillation zone should be incorporated into existing models. It is thought that this new result may be circumstantially related to the enhanced solar activity during the period of observation. Author

Subject Categories:

  • Atmospheric Physics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE