Variations in the Characteristics of a HF Signal over an Oblique Sounding Path during the Solar Eclipse on August 11, 1999
Abstract We present the results of measurements of the HF-signal characteristics over the path Praha - Nizhny Novgorod during the solar eclipse on August 11, 1999. A 10-dB increase in the HF-signal amplitude and an increase in the frequency of quasiperiodic fading were observed during daytime in the...
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Gespeichert in:
| Autor*in: |
Uryadov, V. P. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2000 |
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| Schlagwörter: |
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| Anmerkung: |
© Plenum Publishing Corporation 2000 |
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| Übergeordnetes Werk: |
Enthalten in: Radiophysics and quantum electronics - Kluwer Academic Publishers-Plenum Publishers, 1969, 43(2000), 8 vom: Aug., Seite 614-618 |
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volume:43 ; year:2000 ; number:8 ; month:08 ; pages:614-618 |
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10.1023/A:1004801201847 |
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OLC2063574553 |
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| 520 | |a Abstract We present the results of measurements of the HF-signal characteristics over the path Praha - Nizhny Novgorod during the solar eclipse on August 11, 1999. A 10-dB increase in the HF-signal amplitude and an increase in the frequency of quasiperiodic fading were observed during daytime in the course of the eclipse with phase about 68-85%. An interpretation of the effects observed is given. On the basis of simulations, we show that the increase in the amplitude is related to a decrease in absorption losses which is caused by the corresponding decrease in the electron density in D- and E-layers by about 30-45%. The increase in the fading frequency results from beating of the modes that have different Doppler shifts due to phase-path variations during the eclipse. An estimate for the rate of electron-density variation during the eclipse was obtained: dN/dt ∼ (2-2.5) ·$ 10^{2} $ $ cm^{-3} $$ s^{-1} $. | ||
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| 700 | 1 | |a Ponyatov, A. A. |4 aut | |
| 700 | 1 | |a Boiko, G. N. |4 aut | |
| 700 | 1 | |a Terent'ev, S. P. |4 aut | |
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10.1023/A:1004801201847 doi (DE-627)OLC2063574553 (DE-He213)A:1004801201847-p DE-627 ger DE-627 rakwb eng 530 620 VZ Uryadov, V. P. verfasserin aut Variations in the Characteristics of a HF Signal over an Oblique Sounding Path during the Solar Eclipse on August 11, 1999 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 2000 Abstract We present the results of measurements of the HF-signal characteristics over the path Praha - Nizhny Novgorod during the solar eclipse on August 11, 1999. A 10-dB increase in the HF-signal amplitude and an increase in the frequency of quasiperiodic fading were observed during daytime in the course of the eclipse with phase about 68-85%. An interpretation of the effects observed is given. On the basis of simulations, we show that the increase in the amplitude is related to a decrease in absorption losses which is caused by the corresponding decrease in the electron density in D- and E-layers by about 30-45%. The increase in the fading frequency results from beating of the modes that have different Doppler shifts due to phase-path variations during the eclipse. An estimate for the rate of electron-density variation during the eclipse was obtained: dN/dt ∼ (2-2.5) ·$ 10^{2} $ $ cm^{-3} $$ s^{-1} $. Doppler Shift Solar Eclipse Absorption Loss Frequency Result Fading Frequency Leonov, A. M. aut Ponyatov, A. A. aut Boiko, G. N. aut Terent'ev, S. P. aut Enthalten in Radiophysics and quantum electronics Kluwer Academic Publishers-Plenum Publishers, 1969 43(2000), 8 vom: Aug., Seite 614-618 (DE-627)130499560 (DE-600)760167-0 (DE-576)016080793 0033-8443 nnns volume:43 year:2000 number:8 month:08 pages:614-618 https://doi.org/10.1023/A:1004801201847 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OPC-AST GBV_ILN_70 AR 43 2000 8 08 614-618 |
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10.1023/A:1004801201847 doi (DE-627)OLC2063574553 (DE-He213)A:1004801201847-p DE-627 ger DE-627 rakwb eng 530 620 VZ Uryadov, V. P. verfasserin aut Variations in the Characteristics of a HF Signal over an Oblique Sounding Path during the Solar Eclipse on August 11, 1999 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 2000 Abstract We present the results of measurements of the HF-signal characteristics over the path Praha - Nizhny Novgorod during the solar eclipse on August 11, 1999. A 10-dB increase in the HF-signal amplitude and an increase in the frequency of quasiperiodic fading were observed during daytime in the course of the eclipse with phase about 68-85%. An interpretation of the effects observed is given. On the basis of simulations, we show that the increase in the amplitude is related to a decrease in absorption losses which is caused by the corresponding decrease in the electron density in D- and E-layers by about 30-45%. The increase in the fading frequency results from beating of the modes that have different Doppler shifts due to phase-path variations during the eclipse. An estimate for the rate of electron-density variation during the eclipse was obtained: dN/dt ∼ (2-2.5) ·$ 10^{2} $ $ cm^{-3} $$ s^{-1} $. Doppler Shift Solar Eclipse Absorption Loss Frequency Result Fading Frequency Leonov, A. M. aut Ponyatov, A. A. aut Boiko, G. N. aut Terent'ev, S. P. aut Enthalten in Radiophysics and quantum electronics Kluwer Academic Publishers-Plenum Publishers, 1969 43(2000), 8 vom: Aug., Seite 614-618 (DE-627)130499560 (DE-600)760167-0 (DE-576)016080793 0033-8443 nnns volume:43 year:2000 number:8 month:08 pages:614-618 https://doi.org/10.1023/A:1004801201847 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OPC-AST GBV_ILN_70 AR 43 2000 8 08 614-618 |
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10.1023/A:1004801201847 doi (DE-627)OLC2063574553 (DE-He213)A:1004801201847-p DE-627 ger DE-627 rakwb eng 530 620 VZ Uryadov, V. P. verfasserin aut Variations in the Characteristics of a HF Signal over an Oblique Sounding Path during the Solar Eclipse on August 11, 1999 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 2000 Abstract We present the results of measurements of the HF-signal characteristics over the path Praha - Nizhny Novgorod during the solar eclipse on August 11, 1999. A 10-dB increase in the HF-signal amplitude and an increase in the frequency of quasiperiodic fading were observed during daytime in the course of the eclipse with phase about 68-85%. An interpretation of the effects observed is given. On the basis of simulations, we show that the increase in the amplitude is related to a decrease in absorption losses which is caused by the corresponding decrease in the electron density in D- and E-layers by about 30-45%. The increase in the fading frequency results from beating of the modes that have different Doppler shifts due to phase-path variations during the eclipse. An estimate for the rate of electron-density variation during the eclipse was obtained: dN/dt ∼ (2-2.5) ·$ 10^{2} $ $ cm^{-3} $$ s^{-1} $. Doppler Shift Solar Eclipse Absorption Loss Frequency Result Fading Frequency Leonov, A. M. aut Ponyatov, A. A. aut Boiko, G. N. aut Terent'ev, S. P. aut Enthalten in Radiophysics and quantum electronics Kluwer Academic Publishers-Plenum Publishers, 1969 43(2000), 8 vom: Aug., Seite 614-618 (DE-627)130499560 (DE-600)760167-0 (DE-576)016080793 0033-8443 nnns volume:43 year:2000 number:8 month:08 pages:614-618 https://doi.org/10.1023/A:1004801201847 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OPC-AST GBV_ILN_70 AR 43 2000 8 08 614-618 |
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10.1023/A:1004801201847 doi (DE-627)OLC2063574553 (DE-He213)A:1004801201847-p DE-627 ger DE-627 rakwb eng 530 620 VZ Uryadov, V. P. verfasserin aut Variations in the Characteristics of a HF Signal over an Oblique Sounding Path during the Solar Eclipse on August 11, 1999 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 2000 Abstract We present the results of measurements of the HF-signal characteristics over the path Praha - Nizhny Novgorod during the solar eclipse on August 11, 1999. A 10-dB increase in the HF-signal amplitude and an increase in the frequency of quasiperiodic fading were observed during daytime in the course of the eclipse with phase about 68-85%. An interpretation of the effects observed is given. On the basis of simulations, we show that the increase in the amplitude is related to a decrease in absorption losses which is caused by the corresponding decrease in the electron density in D- and E-layers by about 30-45%. The increase in the fading frequency results from beating of the modes that have different Doppler shifts due to phase-path variations during the eclipse. An estimate for the rate of electron-density variation during the eclipse was obtained: dN/dt ∼ (2-2.5) ·$ 10^{2} $ $ cm^{-3} $$ s^{-1} $. Doppler Shift Solar Eclipse Absorption Loss Frequency Result Fading Frequency Leonov, A. M. aut Ponyatov, A. A. aut Boiko, G. N. aut Terent'ev, S. P. aut Enthalten in Radiophysics and quantum electronics Kluwer Academic Publishers-Plenum Publishers, 1969 43(2000), 8 vom: Aug., Seite 614-618 (DE-627)130499560 (DE-600)760167-0 (DE-576)016080793 0033-8443 nnns volume:43 year:2000 number:8 month:08 pages:614-618 https://doi.org/10.1023/A:1004801201847 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OPC-AST GBV_ILN_70 AR 43 2000 8 08 614-618 |
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10.1023/A:1004801201847 doi (DE-627)OLC2063574553 (DE-He213)A:1004801201847-p DE-627 ger DE-627 rakwb eng 530 620 VZ Uryadov, V. P. verfasserin aut Variations in the Characteristics of a HF Signal over an Oblique Sounding Path during the Solar Eclipse on August 11, 1999 2000 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 2000 Abstract We present the results of measurements of the HF-signal characteristics over the path Praha - Nizhny Novgorod during the solar eclipse on August 11, 1999. A 10-dB increase in the HF-signal amplitude and an increase in the frequency of quasiperiodic fading were observed during daytime in the course of the eclipse with phase about 68-85%. An interpretation of the effects observed is given. On the basis of simulations, we show that the increase in the amplitude is related to a decrease in absorption losses which is caused by the corresponding decrease in the electron density in D- and E-layers by about 30-45%. The increase in the fading frequency results from beating of the modes that have different Doppler shifts due to phase-path variations during the eclipse. An estimate for the rate of electron-density variation during the eclipse was obtained: dN/dt ∼ (2-2.5) ·$ 10^{2} $ $ cm^{-3} $$ s^{-1} $. Doppler Shift Solar Eclipse Absorption Loss Frequency Result Fading Frequency Leonov, A. M. aut Ponyatov, A. A. aut Boiko, G. N. aut Terent'ev, S. P. aut Enthalten in Radiophysics and quantum electronics Kluwer Academic Publishers-Plenum Publishers, 1969 43(2000), 8 vom: Aug., Seite 614-618 (DE-627)130499560 (DE-600)760167-0 (DE-576)016080793 0033-8443 nnns volume:43 year:2000 number:8 month:08 pages:614-618 https://doi.org/10.1023/A:1004801201847 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OPC-AST GBV_ILN_70 AR 43 2000 8 08 614-618 |
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Variations in the Characteristics of a HF Signal over an Oblique Sounding Path during the Solar Eclipse on August 11, 1999 |
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Abstract We present the results of measurements of the HF-signal characteristics over the path Praha - Nizhny Novgorod during the solar eclipse on August 11, 1999. A 10-dB increase in the HF-signal amplitude and an increase in the frequency of quasiperiodic fading were observed during daytime in the course of the eclipse with phase about 68-85%. An interpretation of the effects observed is given. On the basis of simulations, we show that the increase in the amplitude is related to a decrease in absorption losses which is caused by the corresponding decrease in the electron density in D- and E-layers by about 30-45%. The increase in the fading frequency results from beating of the modes that have different Doppler shifts due to phase-path variations during the eclipse. An estimate for the rate of electron-density variation during the eclipse was obtained: dN/dt ∼ (2-2.5) ·$ 10^{2} $ $ cm^{-3} $$ s^{-1} $. © Plenum Publishing Corporation 2000 |
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Abstract We present the results of measurements of the HF-signal characteristics over the path Praha - Nizhny Novgorod during the solar eclipse on August 11, 1999. A 10-dB increase in the HF-signal amplitude and an increase in the frequency of quasiperiodic fading were observed during daytime in the course of the eclipse with phase about 68-85%. An interpretation of the effects observed is given. On the basis of simulations, we show that the increase in the amplitude is related to a decrease in absorption losses which is caused by the corresponding decrease in the electron density in D- and E-layers by about 30-45%. The increase in the fading frequency results from beating of the modes that have different Doppler shifts due to phase-path variations during the eclipse. An estimate for the rate of electron-density variation during the eclipse was obtained: dN/dt ∼ (2-2.5) ·$ 10^{2} $ $ cm^{-3} $$ s^{-1} $. © Plenum Publishing Corporation 2000 |
| abstract_unstemmed |
Abstract We present the results of measurements of the HF-signal characteristics over the path Praha - Nizhny Novgorod during the solar eclipse on August 11, 1999. A 10-dB increase in the HF-signal amplitude and an increase in the frequency of quasiperiodic fading were observed during daytime in the course of the eclipse with phase about 68-85%. An interpretation of the effects observed is given. On the basis of simulations, we show that the increase in the amplitude is related to a decrease in absorption losses which is caused by the corresponding decrease in the electron density in D- and E-layers by about 30-45%. The increase in the fading frequency results from beating of the modes that have different Doppler shifts due to phase-path variations during the eclipse. An estimate for the rate of electron-density variation during the eclipse was obtained: dN/dt ∼ (2-2.5) ·$ 10^{2} $ $ cm^{-3} $$ s^{-1} $. © Plenum Publishing Corporation 2000 |
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Variations in the Characteristics of a HF Signal over an Oblique Sounding Path during the Solar Eclipse on August 11, 1999 |
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Leonov, A. M. Ponyatov, A. A. Boiko, G. N. Terent'ev, S. P. |
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