The Geminid meteor shower during the ECOMA sounding rocket campaign: specular and head echo radar observations

Stober, Gunter; Schult, Carsten; Baumann, Carsten; Latteck, R.; Rapp, Markus

doi:10.5194/angeo-31-473-2013

Cited by 23 publications

(19 citation statements)

References 46 publications

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“…These results, and with reference to Stober et al (2012), suggest that the Geminids do not contribute a relevant fraction to the meteoric mass input. They contain many large, visible meteors, but much fewer small meteors than the sporadic meteor population.…”

Section: Discussionsupporting

confidence: 50%

“…10 shows a fairly convincing correlation between sporadic meteor echoes ( Fig. 7 in Stober et al (2012), left panel, black line) and Na column density of 2010 from Fig. 680 7 and that it is not inconsistent with a correlation between Na abundance and meteoric smoke particles and a correlation between meteoric smoke particles and sporadic meteor echoes.…”

Section: Discussionmentioning

confidence: 78%

“…3 With reference to Fig. 7 of Stober et al (2012), both meteoric smoke particles and Na definitely do not vary as the number of observed Geminid echoes as shown by the red line in their figure. Therefore, our observations are in agree-700 ment with an assumption that the Geminids meteor shower contributes very little or nothing to the total number of meteoric smoke particles or to mesospheric Na, but that sporadic meteors definitely do.…”

Section: Discussionmentioning

confidence: 87%

“…We see a gradual increase in total meteor counts until 14 December, when the maximum total meteor count rates are measured. After that, the total meteor count rates decrease rapidly, indicating that the meteor shower is almost over, see also Stober et al (2012). The maximum total number of meteors occurs each day from around 23:00 UT until approximately 05:00 UT the next day.…”

Section: Skiymet Andenes Meteor Radarmentioning

confidence: 90%

“…The radiation pattern is almost symmetrical due to the use of crossed dipole antennae (Singer et al, 2004). A more detailed description of the experiment configuration is given by Stober et al (2012).…”

Section: Andenes Meteor Radarmentioning

confidence: 99%

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Development of the mesospheric Na layer at 69° N during the Geminids meteor shower 2010

et al. 2013

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Abstract. The ECOMA sounding rocket campaign in 2010 was performed to investigate the charge state and number density of meteoric smoke particles during the Geminids meteor shower in December 2010. The ALOMAR Na lidar contributed to the campaign with measurements of sodium number density, temperature and line-of-sight wind between 80 and 110 km altitude over Andøya in northern Norway. This paper investigates a possible connection between the Geminids meteor shower and the mesospheric sodium layer. We compare with data from a meteor radar and from a rocketborne in situ particle instrument on three days. Our main result is that the sodium column density is smaller during the Geminids meteor shower than the winter average at the same latitude. Moreover, during two of the three years considered, the sodium column density decreased steadily during these three weeks of the year. Both the observed decrease of Na column density by 30 % and of meteoric smoke particle column density correlate well with a corresponding decrease of sporadic meteor echoes. We found no correlation between Geminids meteor flux rates and sodium column density, nor between sporadic meteors and Na column density (R = 0.25). In general, we found the Na column density to be at very low values for winter, between 1.8 and 2.6 × 10 13 m −2 . We detected two meteor trails containing sodium, on 13 December 2010 at 87.1 km and on 19 December 2010 at 84 km. From these meteor trails, we estimate a global meteoric Na flux of 121 kg d −1 and a global total meteoric influx of 20.2 t d −1 .

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Section: Discussionsupporting

confidence: 50%

Section: Discussionmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 87%

Section: Skiymet Andenes Meteor Radarmentioning

confidence: 90%

Section: Andenes Meteor Radarmentioning

confidence: 99%

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Development of the mesospheric Na layer at 69° N during the Geminids meteor shower 2010

et al. 2013

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Polar mesospheric horizontal divergence and relative vorticity measurements using multiple specular meteor radars

Chau

Stober

Hall³

et al. 2017

Radio Science

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111

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We present the first horizontal divergence and relative vorticity measurements at polar mesospheric altitudes measured from the ground. Our technique relies on combining information from two specular meteor radars (SMRs) separated 130 km at polar latitudes, specifically, the Andenes and Tromsø radars in northern Norway. The resulting values are obtained over a region that spans an approximate area of 400 km diameter at mesospheric altitudes. The temporal and vertical resolution are 1 h and 2 km in altitude. The technique not only allows to obtain the gradient terms of the horizontal wind, that in turn are used to derive the horizontal divergence and relative vorticity, but also improves the horizontal sampling compared to single SMRs. Synthetic data are used to qualitatively test the technique and identify potential sources of biases on the resulting measurements. For example, we have found that an apparent large mean vertical velocity is obtained, after averaging many days, if there is a persistent divergent field. We present a climatology of the resulting wind field parameters from 12 years of continuous observations and focus on the summer results. We found a persistent altitudinal pattern in both the horizontal divergence and relative vorticity fields during all northern hemispheric summers. The horizontal divergence is mainly positive decreasing in magnitude below ∼86 km, and the relative vorticity is negative/positive below/above ∼88 km over northern Norway.

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Radio meteor velocity estimation based on the Fourier transform

Korotyshkin

2024

Advances in Space Research

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The Geminid meteor shower during the ECOMA sounding rocket campaign: specular and head echo radar observations

Cited by 23 publications

References 46 publications

Development of the mesospheric Na layer at 69° N during the Geminids meteor shower 2010

Development of the mesospheric Na layer at 69° N during the Geminids meteor shower 2010

Polar mesospheric horizontal divergence and relative vorticity measurements using multiple specular meteor radars

Radio meteor velocity estimation based on the Fourier transform

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