Comparison of ionospheric radio occultation CHAMP data with IRI 2001
GPS radio occultation measurements on board low Earth orbiting satellites can provide vertical electron density profiles of the ionosphere from satellite orbit heights down to the bottomside. Ionospheric radio occultation (IRO) measurements carried out onboard the German CHAMP satellite mission sinc...
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| Format: | Article |
| Language: | deu |
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Copernicus Publications
2004-01-01
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| Series: | Advances in Radio Science |
| Online Access: | http://www.adv-radio-sci.net/2/275/2004/ars-2-275-2004.pdf |
| _version_ | 1811252160066748416 |
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| author | N. Jakowski |
| author_facet | N. Jakowski |
| author_sort | N. Jakowski |
| collection | DOAJ |
| description | GPS radio occultation measurements on board low Earth orbiting satellites can provide vertical electron density profiles of the ionosphere from satellite orbit heights down to the bottomside. Ionospheric radio occultation (IRO) measurements carried out onboard the German CHAMP satellite mission since 11 April 2001 were used to derive vertical electron density profiles (EDP’s) on a routine basis. About 150 vertical electron density profiles may be retrieved per day thus providing a huge data basis for testing and developing ionospheric models. Although the validation of the EDP retrievals is not yet completed, the paper addresses a systematic comparison of about 78 000 electron density profiles derived from CHAMP IRO data with the International Reference Ionosphere (IRI 2001).</p><p style="line-height: 20px;"> The results are discussed for quite different geophysical conditions, e.g. as a function of latitude, local time and geomagnetic activity.</p><p style="line-height: 20px;"> The comparison of IRO data with corresponding IRI data indicates that IRI generally overestimates the upper part of the ionosphere whereas it underestimates the lower part of the ionosphere under high solar activity conditions. In a first order correction this systematic deviation could be compensated by introducing a height dependence correction factor in IRI profiling. |
| first_indexed | 2024-04-12T16:31:38Z |
| format | Article |
| id | doaj.art-0f587767669e4a92aefdb585a72f780f |
| institution | Directory Open Access Journal |
| issn | 1684-9965 1684-9973 |
| language | deu |
| last_indexed | 2024-04-12T16:31:38Z |
| publishDate | 2004-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Advances in Radio Science |
| spelling | doaj.art-0f587767669e4a92aefdb585a72f780f2022-12-22T03:25:08ZdeuCopernicus PublicationsAdvances in Radio Science1684-99651684-99732004-01-012275279Comparison of ionospheric radio occultation CHAMP data with IRI 2001N. JakowskiGPS radio occultation measurements on board low Earth orbiting satellites can provide vertical electron density profiles of the ionosphere from satellite orbit heights down to the bottomside. Ionospheric radio occultation (IRO) measurements carried out onboard the German CHAMP satellite mission since 11 April 2001 were used to derive vertical electron density profiles (EDP’s) on a routine basis. About 150 vertical electron density profiles may be retrieved per day thus providing a huge data basis for testing and developing ionospheric models. Although the validation of the EDP retrievals is not yet completed, the paper addresses a systematic comparison of about 78 000 electron density profiles derived from CHAMP IRO data with the International Reference Ionosphere (IRI 2001).</p><p style="line-height: 20px;"> The results are discussed for quite different geophysical conditions, e.g. as a function of latitude, local time and geomagnetic activity.</p><p style="line-height: 20px;"> The comparison of IRO data with corresponding IRI data indicates that IRI generally overestimates the upper part of the ionosphere whereas it underestimates the lower part of the ionosphere under high solar activity conditions. In a first order correction this systematic deviation could be compensated by introducing a height dependence correction factor in IRI profiling.http://www.adv-radio-sci.net/2/275/2004/ars-2-275-2004.pdf |
| spellingShingle | N. Jakowski Comparison of ionospheric radio occultation CHAMP data with IRI 2001 Advances in Radio Science |
| title | Comparison of ionospheric radio occultation CHAMP data with IRI 2001 |
| title_full | Comparison of ionospheric radio occultation CHAMP data with IRI 2001 |
| title_fullStr | Comparison of ionospheric radio occultation CHAMP data with IRI 2001 |
| title_full_unstemmed | Comparison of ionospheric radio occultation CHAMP data with IRI 2001 |
| title_short | Comparison of ionospheric radio occultation CHAMP data with IRI 2001 |
| title_sort | comparison of ionospheric radio occultation champ data with iri 2001 |
| url | http://www.adv-radio-sci.net/2/275/2004/ars-2-275-2004.pdf |
| work_keys_str_mv | AT njakowski comparisonofionosphericradiooccultationchampdatawithiri2001 |