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
High resolution electron density profiles (<i>Ne</i>) measured with the Arecibo (18.4 N, 66.7 W), Incoherent Scatter radar (I. S.) are used to obtain the bottomside shape parameters <i>B0</i>, <i>B1</i> for a solar maximum period (1989–90). Median values o...
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doaj-7b6163c6286e44e3a1229352443738b32020-11-24T22:19:02ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762002-06-012081782210.5194/angeo-20-817-2002The bottomside parameters <i>B0</i>, <i>B1</i> obtained from incoherent scatter measurements during a solar maximum and their comparisons with the IRI-2001 modelN. K. Sethi0N. K. Sethi1K. K. Mahajan2Correspondence to: N. K. Sethi (nksethi@csnpl.ren.nic.in)Radio and Atmospheric Sciences Division, National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi – 110 012, IndiaRadio and Atmospheric Sciences Division, National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi – 110 012, IndiaHigh resolution electron density profiles (<i>Ne</i>) measured with the Arecibo (18.4 N, 66.7 W), Incoherent Scatter radar (I. S.) are used to obtain the bottomside shape parameters <i>B0</i>, <i>B1</i> for a solar maximum period (1989–90). 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 <i>B0</i> for the local times from about 12:00 LT to about 20:00 LT. Furthermore, the IRI model tends to generally overestimate <i>B1</i> at all local times. At Arecibo, <i>B0</i> increases by about 50%, and <i>B1</i> decreases by about 30% from solar minimum to solar maximum.<br><br><b>Key words. </b>Ionosphere (equational ionosphere; modeling and forecasting)https://www.ann-geophys.net/20/817/2002/angeo-20-817-2002.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
N. K. Sethi N. K. Sethi K. K. Mahajan |
spellingShingle |
N. K. Sethi N. K. Sethi K. K. Mahajan 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 Annales Geophysicae |
author_facet |
N. K. Sethi N. K. Sethi K. K. Mahajan |
author_sort |
N. K. Sethi |
title |
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 |
title_short |
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 |
title_full |
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 |
title_fullStr |
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 |
title_full_unstemmed |
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 |
title_sort |
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 |
publisher |
Copernicus Publications |
series |
Annales Geophysicae |
issn |
0992-7689 1432-0576 |
publishDate |
2002-06-01 |
description |
High resolution electron
density profiles (<i>Ne</i>) measured with the Arecibo (18.4 N, 66.7 W),
Incoherent Scatter radar (I. S.) are used to obtain the bottomside shape
parameters <i>B0</i>, <i>B1</i> for a solar maximum period (1989–90). 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 <i>B0</i>
for the local times from about 12:00 LT to about 20:00 LT. Furthermore, the IRI
model tends to generally overestimate <i>B1</i> at all local times. At Arecibo,
<i>B0</i> increases by about 50%, and <i>B1</i> decreases by about 30% from
solar minimum to solar maximum.<br><br><b>Key words. </b>Ionosphere (equational
ionosphere; modeling and forecasting) |
url |
https://www.ann-geophys.net/20/817/2002/angeo-20-817-2002.pdf |
work_keys_str_mv |
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