Radar Observations During Meteor Showers 9 October 1946.
نویسندگان
چکیده
Communications relative to advertising should be addressed to THEO. J. CHRISTENSEN, 1515 Massachusetts Avenue, N.W., Washington 5, D. C. Communications relative to membership in the Association and to all matters of business of the Association should be addressed to the Administrative Secretary, AAAS, 1515 Massachusetts Avenue, N.W., Washington 5, D. C. Annual subscription, $7.50 Single copies, 25 cents Entered as second-class matter July 18, 1923 at the Post Office at Lancaster, Pa., under the Act of March 3, 1879. o n Ju ne 9 , 2 01 7
منابع مشابه
All-sky interferometric meteor radar meteoroid speed estimation using the Fresnel transform
Fresnel transform meteor speed estimation is investigated. A spectral based technique is developed allowing the transform to be applied at low temporal sampling rates. Simulations are used to compare meteoroid speeds determined using the Fresnel transform and alternative techniques, confirming that the Fresnel transform produces the most accurate meteoroid speed estimates for high effective pul...
متن کاملForecast for Phoenicids in 2008 , 2014 , and 2019
We report here on a complete forecast of the activity of future Phoenicid meteor showers in the period 2008– 2020. We detail predictions of Phoenicids activities during three years: 2008, 2014, and 2019. In 2008, the trail of 1866 will intersect with the Earth orbit. In 2014, the origin of the activity will be due to several trails formed from the 19th to the early 20th centuries. The display i...
متن کاملMeteor Observations with an MF Radar 1
We conducted meteor echo observations using the Buckland Park MF radar (35 S, 138 E) at 00:40{05:45LT on October 22, 1997. In addition to the usual full correlation analysis (FCA) technique to measure horizontal wind velocities from 60 to 100 km MF radars have a potential to detect meteor echoes and infer winds through their Doppler frequency shifts. Because of the relatively low radio frequenc...
متن کاملLeonid meteor stream from Ondřejov radar observations in 1965 – 1967
Results of Ondřejov radar observations of Leonid meteor shower in 1965–1967 are presented. Observations performed during previous returns of Leonid meteor showers indicate that both in 1965 and 1966 the peak activity was observed at almost the same solar longitude near L = 235. ◦17. The activity pattern in 1965 showed two well pronounced peaks separated by 23 hours where the second one seemed t...
متن کاملThe Dynamics of Low-Perihelion Meteoroid Streams
The Canadian Meteor Orbit Radar (CMOR) has collected information on a number of weak meteor showers that have not been well characterized in the literature. A subsample of these showers (1) do not show a strong orbital resemblance to any known comets or asteroids, (2) have highly inclined orbits, (3) are at low perihelion distances ( 1 AU) and (4) are at small semimajor axes (\2 AU). Though one...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Science
دوره 104 2706 شماره
صفحات -
تاریخ انتشار 1946