Modification of IRI half-density height option for low latitudes

Gulyaeva, T.L.; Mahajan, K. K.; Sethi, N.K.

doi:10.1016/0273-1177(95)00916-7

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…A comparison of Ne profiles derived from ionogram at low-latitudes during solar minimum and maximum periods, with those obtained from IRI-90, also showed similar results (De Gonzalez 1996;Aggarwal et al, 1996). Gulyaeva et al (1996) compared the ratio h 0.5/H mF2 using Arecibo Ne profiles during summer, with those obtained from the IRI-90 model. Their analysis showed that the IRI-90 underestimated the ratios at all local times in comparison to those obtained from the observations.…”

Section: Introductionsupporting

confidence: 65%

The bottomside parameters B0, B1 obtained from incoherent scatter measurements during a solar maximum and their comparisons with the IRI-2001 model

Sethi

Mahajan

2002

Ann. Geophys.

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Abstract. High resolution electron density profiles (Ne) measured with the Arecibo (18.4 N, 66.7 W), Incoherent Scatter radar (I.S.) are used to obtain the bottomside shape parameters B0, B1 for a solar maximum period . Median values of these parameters are compared with those obtained from the IRI-2001 model. It is observed that during summer, the IRI values agree fairly well with the Arecibo values, though the numbers are somewhat larger during the daytime. Discrepancies occur during winter and equinox, when the IRI underestimates B0 for the local times from about 12:00 LT to about 20:00 LT. Furthermore, the IRI model tends to generally overestimate B1 at all local times. At Arecibo, B0 increases by about 50%, and B1 decreases by about 30% from solar minimum to solar maximum.

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Section: Introductionsupporting

confidence: 65%

The bottomside parameters B0, B1 obtained from incoherent scatter measurements during a solar maximum and their comparisons with the IRI-2001 model

Sethi

Mahajan

2002

Ann. Geophys.

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“…Mahajan et al [1995] showed, using Arecibo incoherent scatter radar data, that IR! produced a bottomside that was too thick by differing amounts depending on season, and improvements to IRI have been suggested based on this work [Gulyaeva et al, 1996]. Comparisons to digisonde data from Jicamarca [Reinisch and Huang, 1996] have likewise shown some differences between data and IRI, with the most dramatic differences occurring in August 1993 when IRI's bottomside F2 layer was seen to be tens of kilometers thinner than observed.…”

Section: Introductionmentioning

confidence: 63%

Improving IRI‐90 low‐latitude electron density specification

Decker¹,

Anderson²,

Preble³

1997

Radio Science

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Abstract. At low latitudes under moderate to high solar conditions, a number of comparisons between the international reference ionosphere (IRI-90) model of F region electron density profiles and observed profiles measured by the Jicamarca incoherent scatter radar indicate that during the daytime the observed profile shape can be much broader in altitude than that specified by IRI-90, while at night, just after sunset, observed F2 peak altitudes are significantly higher than what is specified by IRI-90. Theoretically derived ionospheric parameters such as F2 peak density (NmF2), F2 peak altitude (hmF2), and profile shape, which are contained in the parameterized ionospheric model (PIM), have been shown in some cases to be in better agreement with Jicamarca observations. This paper describes a new low-latitude option for IRI-90 that uses five ionospheric parameters derived from PIM: the bottomside profile half thickness, NmF2, hmF2, and two parameters of a topside Chapman profile. The generation of electron density profiles using these five parameters is presented, as well as a description of how these parameters can be implemented into the IRI-90 model.

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International reference ionosphere—Status 1995/96

Bilitza

1997

Advances in Space Research

156

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Modification of IRI half-density height option for low latitudes

Cited by 4 publications

References 4 publications

The bottomside parameters <i>B0</i>, <i>B1</i> obtained from incoherent scatter measurements during a solar maximum and their comparisons with the IRI-2001 model

The bottomside parameters <i>B0</i>, <i>B1</i> obtained from incoherent scatter measurements during a solar maximum and their comparisons with the IRI-2001 model

Improving IRI‐90 low‐latitude electron density specification

International reference ionosphere—Status 1995/96

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Modification of IRI half-density height option for low latitudes

Cited by 4 publications

References 4 publications

The bottomside parameters &lt;i&gt;B0&lt;/i&gt;, &lt;i&gt;B1&lt;/i&gt; obtained from incoherent scatter measurements during a solar maximum and their comparisons with the IRI-2001 model

The bottomside parameters &lt;i&gt;B0&lt;/i&gt;, &lt;i&gt;B1&lt;/i&gt; obtained from incoherent scatter measurements during a solar maximum and their comparisons with the IRI-2001 model

Improving IRI‐90 low‐latitude electron density specification

International reference ionosphere—Status 1995/96

Contact Info

Product

Resources

About

The bottomside parameters <i>B0</i>, <i>B1</i> obtained from incoherent scatter measurements during a solar maximum and their comparisons with the IRI-2001 model

The bottomside parameters <i>B0</i>, <i>B1</i> obtained from incoherent scatter measurements during a solar maximum and their comparisons with the IRI-2001 model