Accession Number:

ADA289654

Title:

Space Tether-Radar Data Processing.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

• Brewster, Wayne A.

Report Date:

1994-09-01

Pagination or Media Count:

81.0

Abstract:

NASA conducted the Delta-PMG tethered satellite missions. It was conducted to verify the hollow cathode plasma sources ability to couple electric currents from each end of a long wire tether traversing the ambient low earth orbit ionosphere plasma observations were obtained through a suite of sensors which included large ground based VHF radars. The goal of this thesis was to process the radar data received at the radar based in Hawaii to study disturbances in the Earths ionosphere caused by the tether. After extensive analysis, unique radar returns were identified that were associated with the passage of the tether system through magnetic field lines threading the radars field of view. These returns were interpreted as a plasma cloud propagating along a magnetic field line and reflecting back along another. This phenomenon produced dual returns with inverted Doppler frequency content. AN

Descriptors:

• *IONOSPHERE
• *DOPPLER RADAR
• *TETHERING
• DATA PROCESSING
• GEOMAGNETISM
• CLOUDS
• MAGNETIC FIELDS
• EARTH ORBITS
• PLASMAS(PHYSICS)
• ELECTRON DENSITY
• AUTOCORRELATION
• THESES
• RADAR REFLECTIONS
• ARTIFICIAL SATELLITES
• TELEMETERING DATA
• ELECTRIC CURRENT
• ELECTRICAL IMPEDANCE
• HAWAII
• DOPPLER EFFECT

Subject Categories:

• Active and Passive Radar Detection and Equipment
• Unmanned Spacecraft
• Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE