The blast wave of the Shuttle plume at ionospheric heights

Li, Y. Q.; Jacobson, A. R.; Carlos, R.C.; Massey, R. S.; Taranenko, Y. N.; Wu, Guanghui

doi:10.1029/94gl02548

Cited by 42 publications

(50 citation statements)

References 6 publications

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“…We determine the phase velocity of the equal TEC line at the height of the ionospheric F-region maximum, which makes the main contribution to variations of the TEC between the receiver and the GPS satellite, and corresponds to the region of maximum sensitivity of the method. Since V t approaches the sound velocity at these heights (Li et al, 1994), this makes it possible to identify the sound origin of the TEC disturbance. The SAW source location, calculated without taking into account the refraction corrections, approximately corresponds to the earthquake epicenter.…”

Section: Resultsmentioning

confidence: 99%

“…This procedure is better suited to the detection of a single pulse signal (N -wave) than the frequently used band-pass filter (Li et al, 1994;Minster, 1995, 1996;Fitzgerald, 1997;Calais et al, 1998). A limitation of the band-pass filter is the oscillatory character of the response which prevents it from reconstructing the form of the N -wave.…”

Section: E a R T H Q U A K E O F F C O A St O F C E N T R A L A M E Rmentioning

confidence: 99%

“…This provides no chance of deriving reliable information about the phase and group velocities of the SAW propagation, of estimating angular characteristics of the wave vector, and, further still, of localizing the SAW source. Using the method of transionospheric sounding with VHF radio signals from geostationary satellites, a number of experimental data on SAW parameters were obtained in measurements of the Faraday rotation of the plane of signal polarization, which is proportional to a total electron content (TEC) along the line connecting the satellite-borne transmitter with the receiver (Li et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

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The shock-acoustic waves generated by earthquakes

et al. 2001

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Abstract. We investigate the form and dynamics of shockacoustic waves generated by earthquakes. We use the method for detecting and locating the sources of ionospheric impulsive disturbances, based on using data from a global network of receivers of the GPS navigation system, and require no a priori information about the place and time of the associated effects. The practical implementation of the method is illustrated by a case study of earthquake effects in Turkey (17 August and 12 November 1999), in Southern Sumatra (4 June 2000), and off the coast of Central America (13 January 2001). It was found that in all instances the time period of the ionospheric response is 180-390 s, and the amplitude exceeds, by a factor of two as a minimum, the standard deviation of background fluctuations in total electron content in this range of periods under quiet and moderate geomagnetic conditions. The elevation of the wave vector varies through a range of 20-44 • , and the phase velocity (1100-1300 m/s) approaches the sound velocity at the heights of the ionospheric F-region maximum. The calculated (by neglecting refraction corrections) location of the source roughly corresponds to the earthquake epicenter. Our data are consistent with the present views that shock-acoustic waves are caused by a piston-like movement of the Earth's surface in the zone of an earthquake epicenter.

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Section: Resultsmentioning

confidence: 99%

Section: E a R T H Q U A K E O F F C O A St O F C E N T R A L A M E Rmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The shock-acoustic waves generated by earthquakes

et al. 2001

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“…since the early 1960s (Booker, 1961;Felker and Roberts, 1966;Mendillo et al, 1975Mendillo et al, , 1987Noble, 1990;Jacobson and Carlos, 1994;Li et al, 1994;Bernhardt et al, 1998Bernhardt et al, , 2005Bernhardt et al, , 2012. Chernogor and Blaunstein (2013) summarized the major characteristic parameters of the observed ionospheric effects on the basis of many space shuttle launch cases processed using incoherent scatter and Doppler radars.…”

Section: Introductionmentioning

confidence: 99%

Superimposed disturbance in the ionosphere triggered by spacecraft launches in China

Liu

2015

Ann. Geophys.

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Abstract. Using GPS dual-frequency observations collected by continuously operating GPS tracking stations in China, superimposed disturbances caused by the integrated action of spacecraft's physical effect and chemical effect on ionosphere during the launches of the spacecrafts Tiangong-1 and Shenzhou-8 in China were firstly determined. The results show that the superimposed disturbance was composed of remarkable ionospheric waves and significant ionospheric depletion emerged after both launches. Meanwhile, we found for the first time that the ionospheric waves were made up of two periods of wave by wavelet analysis. The first period of ∼ 4 min shows one event in the near stations and two subevents in the few far stations. The second period of ∼ 9 min shows only one event in all the observed stations. Finally, the time characteristics for ionospheric waves and depletions were examined.

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“…First of all, it is important to remark that TECS variations are close in amplitude, form and duration to the TEC response to shock-acoustic waves (SAW) generated during rocket launchings (Calais and Minster, 1996;Calais et al, 1998b;Li et al, 1994;Afraimovich et al, 2000aAfraimovich et al, , 2001b, earthquakes (Calais and Minster, 1995;Afraimovich et al, 2001c), and explosions (Fitzgerald, 1997;Calais et al, 1998a). In this connection, TECS can mask TEC responses to technogenic effects and lead to spurious signals recorded in detection systems for such effects, based on analyzing signals from the global GPS network.…”

Section: The Difference Of Tecs From the Tec Response Tomentioning

confidence: 99%

Isolated ionospheric disturbances as deduced from global GPS network

2004

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Abstract.We investigate an unusual class of medium-scale traveling ionospheric disturbances of the nonwave type, isolated ionospheric disturbances (IIDs) that manifest themselves in total electron content (TEC) variations in the form of single aperiodic negative TEC disturbances of a duration of about 10 min (the total electron content spikes, TECS). The data were obtained using the technology of global detection of ionospheric disturbances using measurements of TEC variations from a global network of receivers of the GPS. For the first time, we present the TECS morphology for 170 days in 1998-2001. The total number of TEC series, with a duration of each series of about 2.3 h (2h 18m), exceeded 850 000. It was found that TECS are observed in no more than 1-2% of the total number of TEC series mainly in the nighttime in the spring and autumn periods. The TECS amplitude exceeds the mean value of the "background" TEC variation amplitude by a factor of 5-10 as a minimum. TECS represent a local phenomenon with a typical radius of spatial correlation not larger than 500 km. The IID-induced TEC variations are similar in their amplitude, form and duration to the TEC response to shock-acoustic waves (SAW) generated during rocket launchings and earthquakes. However, the IID propagation velocity is less than the SAW velocity (800-1000 m/s) and are most likely to correspond to the velocity of background medium-scale acoustic-gravity waves, on the order of 100-200 m/s.

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The blast wave of the Shuttle plume at ionospheric heights

Cited by 42 publications

References 6 publications

The shock-acoustic waves generated by earthquakes

The shock-acoustic waves generated by earthquakes

Superimposed disturbance in the ionosphere triggered by spacecraft launches in China

Isolated ionospheric disturbances as deduced from global GPS network

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