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Statements

Subject Item
n2:RIV%2F68378289%3A_____%2F12%3A00378728%21RIV13-AV0-68378289
rdf:type
n11:Vysledek skos:Concept
dcterms:description
The topside sounders of the International Satellites for Ionospheric Studies (ISIS) program were designed as analog systems. The resulting ionograms were displayed on 35 mm film for analysis by visual inspection. Each of these satellites, launched between 1962 and 1971, produced data for 10 to 20 years. A number of the original telemetry tapes from this large data set have been converted directly into digital records. Software, known as the Topside Ionogram Scalar With True-Height (TOPIST) algorithm, has been produced and used for the automatic inversion of the ionogram reflection traces on more than 100,000 ISIS-2 digital topside ionograms into topside vertical electron density profiles N-e(h). Here we present some topside ionospheric solar cycle variations deduced from the TOPIST database to illustrate the scientific benefit of improving and expanding the topside ionospheric N-e(h) database. The profile improvements will be based on improvements in the TOPIST software motivated by direct comparisons between TOPIST profiles and profiles produced by manual scaling in the early days of the ISIS program. The database expansion will be based on new software designed to overcome limitations in the original digital topside ionogram database caused by difficulties encountered during the analog-to-digital conversion process in the detection of the ionogram frame sync pulse and/or the frequency markers. This improved and expanded TOPIST topside N-e(h) database will greatly enhance investigations into both short-and long-term ionospheric changes, e.g., the observed topside ionospheric responses to magnetic storms, induced by interplanetary magnetic clouds, and solar cycle variations, respectively. The topside sounders of the International Satellites for Ionospheric Studies (ISIS) program were designed as analog systems. The resulting ionograms were displayed on 35 mm film for analysis by visual inspection. Each of these satellites, launched between 1962 and 1971, produced data for 10 to 20 years. A number of the original telemetry tapes from this large data set have been converted directly into digital records. Software, known as the Topside Ionogram Scalar With True-Height (TOPIST) algorithm, has been produced and used for the automatic inversion of the ionogram reflection traces on more than 100,000 ISIS-2 digital topside ionograms into topside vertical electron density profiles N-e(h). Here we present some topside ionospheric solar cycle variations deduced from the TOPIST database to illustrate the scientific benefit of improving and expanding the topside ionospheric N-e(h) database. The profile improvements will be based on improvements in the TOPIST software motivated by direct comparisons between TOPIST profiles and profiles produced by manual scaling in the early days of the ISIS program. The database expansion will be based on new software designed to overcome limitations in the original digital topside ionogram database caused by difficulties encountered during the analog-to-digital conversion process in the detection of the ionogram frame sync pulse and/or the frequency markers. This improved and expanded TOPIST topside N-e(h) database will greatly enhance investigations into both short-and long-term ionospheric changes, e.g., the observed topside ionospheric responses to magnetic storms, induced by interplanetary magnetic clouds, and solar cycle variations, respectively.
dcterms:title
Improving the automatic inversion of digital Alouette/ISIS ionogram reflection traces into topside electron density profiles Improving the automatic inversion of digital Alouette/ISIS ionogram reflection traces into topside electron density profiles
skos:prefLabel
Improving the automatic inversion of digital Alouette/ISIS ionogram reflection traces into topside electron density profiles Improving the automatic inversion of digital Alouette/ISIS ionogram reflection traces into topside electron density profiles
skos:notation
RIV/68378289:_____/12:00378728!RIV13-AV0-68378289
n11:predkladatel
n16:ico%3A68378289
n3:aktivita
n6:P n6:I
n3:aktivity
I, P(GAP209/10/2086)
n3:cisloPeriodika
4
n3:dodaniDat
n9:2013
n3:domaciTvurceVysledku
n18:3782395
n3:druhVysledku
n7:J
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n19:predkladatel
n3:idSjednocenehoVysledku
140958
n3:idVysledku
RIV/68378289:_____/12:00378728
n3:jazykVysledku
n10:eng
n3:klicovaSlova
ionosphere; electron concentration; radio waves; solar activity
n3:klicoveSlovo
n5:electron%20concentration n5:radio%20waves n5:solar%20activity n5:ionosphere
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[00D747F82784]
n3:nazevZdroje
Radio Science
n3:obor
n13:DG
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
5
n3:projekt
n14:GAP209%2F10%2F2086
n3:rokUplatneniVysledku
n9:2012
n3:svazekPeriodika
47
n3:tvurceVysledku
Huang, X. Benson, R. F. Bilitza, D. Truhlík, Vladimír Wang, Y. L.
n3:wos
000302253700005
s:issn
0048-6604
s:numberOfPages
10
n12:doi
10.1029/2011RS004963