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Hari Vats

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Papers by Hari Vats

Research paper thumbnail of Temporal and spatial variability of EUV flux at 094 Å and its relationship with sunspot activity

New Astronomy, Jul 1, 2023

Research paper thumbnail of Life Elsewhere in the Universe

Research paper thumbnail of Radial Differential Rotation of Solar Corona using Radio Emissions

arXiv (Cornell University), May 27, 2021

Research paper thumbnail of Recent observations of WD1524 at MIRO and participation in WET observing program

Communications in Asteroseismology, 2009

Research paper thumbnail of Effects of interplanetary magnetic clouds on cosmic ray intensity during the declining phase of solar cycle 21

Bulletin of the Astronomical Society of India, Dec 1, 1991

Research paper thumbnail of Determination of source broadening during strong scattering in the interplanetary scintillation

Research paper thumbnail of Detection of large-scale plasma density irregularities using IPS observations at 103 MHz

Solar-Terrestrial Physics, 1984

Research paper thumbnail of Estimation of Solar Coronal Plasma Density by IPS Observations

Research paper thumbnail of Statistics of occurrence of giant pulses from PSR 0950+08 Pages 295-296

Bulletin of the Astronomical Society of India, Jun 1, 2000

Research paper thumbnail of Terrestrial effects of PSR 0950+08 (Paper II)

Bulletin of the Astronomical Society of India, Sep 1, 1993

Research paper thumbnail of A report on PRL's interplanetary scintillation (IPS) radio telescopes

Bulletin of the Astronomical Society of India, Jun 1, 1994

Bull. Astr. Soc. India (1994) 22, 165-175 A report on PRL's interplanetary scintillation (IP... more Bull. Astr. Soc. India (1994) 22, 165-175 A report on PRL's interplanetary scintillation (IPS) radio telescopes Han Om Vats and MR Deshpande Physical Research Laboratory, Ahmedabad 380 009 Received 1993 May 18; accepted 1993 June 3 Abstract. Physical Research ...

Research paper thumbnail of Solar radio burst on 30 September 1993

Indian Journal of Radio and Space Physics, Aug 1, 1996

Research paper thumbnail of Detection of ionospheric polarization scintillations

Research paper thumbnail of Parameters of interplanetary medium

Research paper thumbnail of Solar radiation and air temperature measurement during the solar eclipse of 1980 February 16

Bulletin of the Astronomical Society of India, Mar 1, 1981

Research paper thumbnail of Ionospheric effects during February 1980 solar eclipse

Research paper thumbnail of A Numerical Model of Equatorial & Low Latitude Total Electron Content for Use by Satellite Tracking Systems for Ionospheric Corrections

Research paper thumbnail of Application of diffractive-refractive scattering to VHF wave propagation

Antennas and Propagation, 1989. ICAP 89., Sixth International Conference on (Conf. Publ. No.301), Apr 4, 1989

Research paper thumbnail of On the multiple scattering of VHF/UHF waves in the equatorial ionosphere

Radio Science, May 1, 1981

Using amplitude data of radio beacons at 40, 140, and 360 MHz from ATS 6 (phase II), an attempt h... more Using amplitude data of radio beacons at 40, 140, and 360 MHz from ATS 6 (phase II), an attempt has been made to study scattering of these waves in the equatorial ionosphere. A comparison of observed scintillation index S 4 with the theoretical results of the multiple scattering approach and variation of autocorrelation time with the frequency indicates that this theory explains the results to a large extent. A comparison of power spectra of amplitude records with the ionograms of a nearby equatorial station has led to the following conclusions: The change from a weak scattering regime to a strong scattering regime is gradual and occurs because of the gradual decrease in the scale size of the irregularities (i.e., broadening of the spectra) and the gradual increase in the thickness of the irregular region.

Research paper thumbnail of Variation of VIRGO/SOHO measurements during 1996-2001

Research paper thumbnail of Temporal and spatial variability of EUV flux at 094 Å and its relationship with sunspot activity

New Astronomy, Jul 1, 2023

Research paper thumbnail of Life Elsewhere in the Universe

Research paper thumbnail of Radial Differential Rotation of Solar Corona using Radio Emissions

arXiv (Cornell University), May 27, 2021

Research paper thumbnail of Recent observations of WD1524 at MIRO and participation in WET observing program

Communications in Asteroseismology, 2009

Research paper thumbnail of Effects of interplanetary magnetic clouds on cosmic ray intensity during the declining phase of solar cycle 21

Bulletin of the Astronomical Society of India, Dec 1, 1991

Research paper thumbnail of Determination of source broadening during strong scattering in the interplanetary scintillation

Research paper thumbnail of Detection of large-scale plasma density irregularities using IPS observations at 103 MHz

Solar-Terrestrial Physics, 1984

Research paper thumbnail of Estimation of Solar Coronal Plasma Density by IPS Observations

Research paper thumbnail of Statistics of occurrence of giant pulses from PSR 0950+08 Pages 295-296

Bulletin of the Astronomical Society of India, Jun 1, 2000

Research paper thumbnail of Terrestrial effects of PSR 0950+08 (Paper II)

Bulletin of the Astronomical Society of India, Sep 1, 1993

Research paper thumbnail of A report on PRL's interplanetary scintillation (IPS) radio telescopes

Bulletin of the Astronomical Society of India, Jun 1, 1994

Bull. Astr. Soc. India (1994) 22, 165-175 A report on PRL's interplanetary scintillation (IP... more Bull. Astr. Soc. India (1994) 22, 165-175 A report on PRL's interplanetary scintillation (IPS) radio telescopes Han Om Vats and MR Deshpande Physical Research Laboratory, Ahmedabad 380 009 Received 1993 May 18; accepted 1993 June 3 Abstract. Physical Research ...

Research paper thumbnail of Solar radio burst on 30 September 1993

Indian Journal of Radio and Space Physics, Aug 1, 1996

Research paper thumbnail of Detection of ionospheric polarization scintillations

Research paper thumbnail of Parameters of interplanetary medium

Research paper thumbnail of Solar radiation and air temperature measurement during the solar eclipse of 1980 February 16

Bulletin of the Astronomical Society of India, Mar 1, 1981

Research paper thumbnail of Ionospheric effects during February 1980 solar eclipse

Research paper thumbnail of A Numerical Model of Equatorial & Low Latitude Total Electron Content for Use by Satellite Tracking Systems for Ionospheric Corrections

Research paper thumbnail of Application of diffractive-refractive scattering to VHF wave propagation

Antennas and Propagation, 1989. ICAP 89., Sixth International Conference on (Conf. Publ. No.301), Apr 4, 1989

Research paper thumbnail of On the multiple scattering of VHF/UHF waves in the equatorial ionosphere

Radio Science, May 1, 1981

Using amplitude data of radio beacons at 40, 140, and 360 MHz from ATS 6 (phase II), an attempt h... more Using amplitude data of radio beacons at 40, 140, and 360 MHz from ATS 6 (phase II), an attempt has been made to study scattering of these waves in the equatorial ionosphere. A comparison of observed scintillation index S 4 with the theoretical results of the multiple scattering approach and variation of autocorrelation time with the frequency indicates that this theory explains the results to a large extent. A comparison of power spectra of amplitude records with the ionograms of a nearby equatorial station has led to the following conclusions: The change from a weak scattering regime to a strong scattering regime is gradual and occurs because of the gradual decrease in the scale size of the irregularities (i.e., broadening of the spectra) and the gradual increase in the thickness of the irregular region.

Research paper thumbnail of Variation of VIRGO/SOHO measurements during 1996-2001

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