Spatial and temporal characterization of SCIAMACHY limb pointing errors during the first three years of the mission
Limb scattering retrievals of atmospheric minor constituent profiles require highly accurate knowledge of the tangent heights during the measurements. The limb scattering measurements of the Scanning Imaging Absorption spectroMeter for Atmospheric CartograpHY (SCIAMACHY) on Envisat are affected by t...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2005-01-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/5/2593/2005/acp-5-2593-2005.pdf |
| _version_ | 1818958133794439168 |
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| author | C. von Savigny J. W. Kaiser H. Bovensmann J. P. Burrows I. S. McDermid T. Leblanc |
| author_facet | C. von Savigny J. W. Kaiser H. Bovensmann J. P. Burrows I. S. McDermid T. Leblanc |
| author_sort | C. von Savigny |
| collection | DOAJ |
| description | Limb scattering retrievals of atmospheric minor constituent profiles require highly accurate knowledge of the tangent heights during the measurements. The limb scattering measurements of the Scanning Imaging Absorption spectroMeter for Atmospheric CartograpHY (SCIAMACHY) on Envisat are affected by tangent height errors of up to 2 km. This contribution provides a summary of the temporal and spatial variation of the SCIAMACHY limb pointing errors during the first three years of the SCIAMACHY mission. The tangent height errors are retrieved from the limb measurements in the UV-B spectral range. A seasonal modulation of the monthly mean tangent height offsets is identified with amplitudes of 800m (220m) before (after) the improvement of the Envisat orbit propagator model in December 2003. Even after the December 2003 orbit model improvement a constant offset component of about 1km is present. Furthermore, pointing discontinuities are identified that coincide with the daily updates of the on-board orbit propagator model. In order to reduce the errors in ozone profile retrievals caused by pointing errors to less than 5%, the tangent heights have to be known to within 250m. |
| first_indexed | 2024-12-20T11:20:54Z |
| format | Article |
| id | doaj.art-2227f356a81844039d76e41b01faff1b |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-20T11:20:54Z |
| publishDate | 2005-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-2227f356a81844039d76e41b01faff1b2022-12-21T19:42:31ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242005-01-0151025932602Spatial and temporal characterization of SCIAMACHY limb pointing errors during the first three years of the missionC. von SavignyJ. W. KaiserH. BovensmannJ. P. BurrowsI. S. McDermidT. LeblancLimb scattering retrievals of atmospheric minor constituent profiles require highly accurate knowledge of the tangent heights during the measurements. The limb scattering measurements of the Scanning Imaging Absorption spectroMeter for Atmospheric CartograpHY (SCIAMACHY) on Envisat are affected by tangent height errors of up to 2 km. This contribution provides a summary of the temporal and spatial variation of the SCIAMACHY limb pointing errors during the first three years of the SCIAMACHY mission. The tangent height errors are retrieved from the limb measurements in the UV-B spectral range. A seasonal modulation of the monthly mean tangent height offsets is identified with amplitudes of 800m (220m) before (after) the improvement of the Envisat orbit propagator model in December 2003. Even after the December 2003 orbit model improvement a constant offset component of about 1km is present. Furthermore, pointing discontinuities are identified that coincide with the daily updates of the on-board orbit propagator model. In order to reduce the errors in ozone profile retrievals caused by pointing errors to less than 5%, the tangent heights have to be known to within 250m.http://www.atmos-chem-phys.net/5/2593/2005/acp-5-2593-2005.pdf |
| spellingShingle | C. von Savigny J. W. Kaiser H. Bovensmann J. P. Burrows I. S. McDermid T. Leblanc Spatial and temporal characterization of SCIAMACHY limb pointing errors during the first three years of the mission Atmospheric Chemistry and Physics |
| title | Spatial and temporal characterization of SCIAMACHY limb pointing errors during the first three years of the mission |
| title_full | Spatial and temporal characterization of SCIAMACHY limb pointing errors during the first three years of the mission |
| title_fullStr | Spatial and temporal characterization of SCIAMACHY limb pointing errors during the first three years of the mission |
| title_full_unstemmed | Spatial and temporal characterization of SCIAMACHY limb pointing errors during the first three years of the mission |
| title_short | Spatial and temporal characterization of SCIAMACHY limb pointing errors during the first three years of the mission |
| title_sort | spatial and temporal characterization of sciamachy limb pointing errors during the first three years of the mission |
| url | http://www.atmos-chem-phys.net/5/2593/2005/acp-5-2593-2005.pdf |
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