Results 51 to 60 of about 1,770 (180)

Observation of Mountain Waves and Secondary Gravity Waves in the Mesosphere Lower Thermosphere Above Patagonia

open access: yesJournal of Geophysical Research: Atmospheres, Volume 131, Issue 6, 28 March 2026.
Abstract We find observational evidence for mountain waves (MWs) and secondary gravity waves (2GWs) in the OH*(3‐1) layer above Tierra del Fuego, Argentina. On the night of 21–22 May 2018, the Advanced Mesospheric Temperature Mapper (AMTM) obtained temperatures at ∼84 ${\sim} 84$ km.
Robert Reichert   +7 more
wiley   +1 more source

Infrasound from a radar-observed meteor

open access: yes, 1976
The shock wave produced by the hypersonic entry of a sufficiently large meteoroid into the earth's atmosphere should be detectable at ground level. An array of microbarographs operated at Springhill Meteor Observatory recorded pressure waves on December
B. A. McIntosh   +2 more
core   +1 more source

5. Long-term variations in meteor radar rates, meteor heights and radar-echo amplitudes [PDF]

open access: yesSymposium - International Astronomical Union, 1968
An analysis of meteor radar rates, meteor end-point heights and radar-echo amplitudes observed over the period 1953–66 indicates a long-term variation in these quantities with highest values being recorded in 1963 near solar minimum. The phenomenon is explained in terms of a solar-controlled variation in air density at the 90- to 110-km level, with ...
openaire   +1 more source

Radio Meteor Rates Observed with Meteor Wind Radar during Non-shower Period [PDF]

open access: yes, 1978
192-194Result of a study of meteor activity observed with meteor wind radar at Waltair during non-shower period is presented. The diurnal variation of echo rates recorded on 27/28 Nov. 1977 are discussed and the results are compared with the observations
Rao, B Ramachandra   +3 more
core  

Initial Results of Meteor Wind with Langfang Medium Frequency Radar

open access: yes, 2020
We conducted meteor observations during the Leonid meteor shower on 16 November 2017 and 17 November 2018 with Langfang medium frequency (MF) radar (116° E, 40° N). This was the first nighttime meteor observation by MF radar in mid-latitude China.
Bing Cai   +3 more
core   +1 more source

Solar control of meteor radar rates

open access: yes, 2003
Meteor radar observations carried out in August-September 1953-84 at theOnsala Space Observatory in Sweden show long-term, as well as short termvariations in meteor radar rates.
Lindblad, Bertil Anders
core  

Lawnmower Poetry and the Poetry of Lawnmowers

open access: yes
Critical Quarterly, Volume 68, Issue 1, Page 4-42, April 2026.
Francesca Gardner
wiley   +1 more source

The meteor radar response function: Theory and application to narrow beam MST radar

open access: yes, 2004
The meteor radar response function is an important tool for analyzing meteor backscatter observed by radar systems. We extend previous work on the development of the response function to include a non-uniform meteor ionization profile, provided by meteor
Cervera, M., Elford, W.
core   +1 more source

Radar and optical leonids

open access: yes, 2004
We present joint optical-radar observations of meteors collected near the peak of the Leonid activity in 2002. We show four examples of joint detections with a large, phased array L-band radar and with intensified video cameras.
S. Schijvarg   +9 more
core  

Serial Correlation of Meteor Radar Rates [PDF]

open access: yesSymposium - International Astronomical Union, 1980
Fluctuations in meteor rates. A fundamental concept in meteor astronomy is the rate of occurrence of meteors (hourly rate). The diurnal and seasonal behaviour of meteor radar rates has been the subject of many studies in the past. In these studies the tacit assumption is made that the observed rate variations are of an astronomical nature.
openaire   +1 more source

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