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  • 1
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    VLF wave-particle interaction experiments by EXOS-B/Siple station transmissions (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The relationship between ground station signals and electron pitch angle distribution at L = 4 is reviewed, and signal intensity is discussed. There are two types of relationships between signals and electron distribution: (1) intensification of the signal by a distribution with a high pitch angle anisotropy of pancake type; and (2) triggering of emissions associated with transmissions by a high flux of electrons with low pitch angle anisotropy. The electric field intensity of ground signals is relatively low, which is consistent with those observed by IMP-6 and by a rocket.
    Keywords: COMMUNICATIONS AND RADAR
    Type: ESA Achievements of the Intern. Magnetospheric Study (IMS); p 529-532
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    A transceiver module of the Mu radar (1983)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The transceiver (TR) module of a middle and upper atmospheric radar is described. The TR module used in the radar is mainly composed of two units: a mixer (MIX unit) and a power amplifier (PA unit). The former generates the RF wave for transmission and converts the received echo to the IF signal. A 41.5-MHz local signal fed to mixers passes through a digitally controlled 8-bit phase shifter which can change its value up to 1,000 times in a second, so that the MU radar has the ability to steer its antenna direction quickly and flexibly. The MIX unit also contains a buffer amplifier and a gate for the transmitting signal and preamplifier for the received one whose noise figure is less than 5 dB. The PA unit amplifies the RF signal supplied from the MIX unit up to 63.7 dBm (2350 W), and feeds it to the crossed Yagi antenna.
    Keywords: COMMUNICATIONS AND RADAR
    Type: Intern. Council Sci. Unions Middle Atmosphere Program, Vol. 9; p 421-423
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    The MU radar now partly in operation (1984)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The MU radar (middle- and upper-atmosphere radar) of RASC (Radio Atmospheric Science Center, Kyoto University) is now partly in operation, although the facility will be completed in 1985. The active array system of the radar makes it possible to steer the radar beam as fast as in each interpulse period. Various sophisticated experiments are expected to be performed by the system. A preliminary observation was successful to elucidate atmospheric motions during Typhoon No. 5 which approached the radar site in August, 1983.
    Keywords: COMMUNICATIONS AND RADAR
    Type: International Council of Scientific Unions Middle Atmosphere Program. Handbook for MAP. Vol. 14; p 341-349
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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