Measurement of galactic radio emission at frequency 37 GHz from aboard spacecraft

Details Measurement of galactic radio emission at frequency 37 GHz from aboard spacecraft Measurement of galactic radio emission at frequency 37 GHz from aboard spacecraft

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988rpsct...6...19s&link_type=abstract

In its JPRS Report: Science and Technology. USSR: Space p 19 (SEE N88-30498 24-88) Transl. into ENGLISH from Pisma v Astronomich

Astronomy and Astrophysics

Astronomy

Galactic Radiation, Galactic Radio Waves, Prognoz Satellites, Spacecraft Instruments, Background Radiation, Big Bang Cosmology, Thermal Radiation

Scientific paper

It is postulated that the distribution of thermal galactic radio emission is dominated by extended low-density HII regions (ELD regions), with the remaining HII regions accounting for only 16. Until now it has been impossible to measure the parameters of extended sources of thermal radio emission with sufficient accuracy. This can be done by exoatmospheric scanning at relatively high frequencies. Such measurements were made in 1983 and 1984 by Prognoz-9 during the Relikt experiment. Measurements of the celestial sphere were made in the 400 MHz band near the 37 GHz central frequency; the antenna directional diagram had a width of 5SD.5 at half power. Each celestial sphere point near the galactic plane was observed some 5000 times; total observation time for each point was about 1.5 hours. Fifteen million measurements were made, 10 pct near the galactic plane. The IR excess was found to be greater by a factor of 1.5 to 2.5, requiring a modification of the parameters of the previous distribution model and masses of ionized gases. A precise knowledge of the radiation intensity of extended sources in the short wave portion of the radio range is vital for proper interpretation of data for research on the anisotropy of relict radiation.

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