Probing the ionosphere with the University of Illinois sounder

Technical Report · Thu May 03 04:00:00 EDT 1990

OSTI ID:6137741

Lin, K H; Schlegl, W S; Yang, K S; Yeh, K

The University of Illinois has recently deployed an HF oblique sounder, the purpose of which is to probe the ionosphere for wideband response. The sounder is capable of operations in two modes: ranging mode and probing mode. Under the ranging mode, group delay measurements are made using phase modulated PN codes. Such measurements can assist the determination of propagation mode and help the data interpretation. Under the probing mode, a comb of CW signals across the band of interest are sent to probe the ionospheric response. The transmitter is located at Platteville, Colorado and toward the east at approximately one-hop distance is the receiver located at Urbana, Illinois. Within the frequency range of 5 to 15 MHz, the transmitter is designed to synthesize up to six discrete frequencies selectable among a possible eight hundred each separated from its neighbor by 12.5 kHz for probing measurements. Up to a total power of 200 W can be fed to a transmitting antenna which is a log-periodic array consisting of 18 elements above a ground screen.

• Research Organization: Illinois Univ., Urbana, IL (United States). Dept. of Electrical and Computer Engineering
• OSTI ID: 6137741
• Report Number(s): AD-P-006311/5/XAB
• Country of Publication: United States
• Language: English

Related Subjects

661320* -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANTENNAS
EARTH ATMOSPHERE
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
GOES SATELLITES
IONOSONDES
IONOSPHERE
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
PLANETARY IONOSPHERES
RADIATIONS
RADIO EQUIPMENT
RADIOWAVE RADIATION
SATELLITES
WAVE PROPAGATION