Advancements in solar spectral irradiance measurements by the TSIS-1 spectral irradiance monitor and its role for long-term data continuity
The first implementation of NASA’s Total and Spectral Solar Irradiance Sensor (TSIS-1) launched on December 15th, 2017, and was integrated into the International Space Station (ISS) to measure both the total solar irradiance (TSI) and the solar spectral irradiance (SSI). The direct measurement of th...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2024-01-01
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| Series: | Journal of Space Weather and Space Climate |
| Subjects: | |
| Online Access: | https://www.swsc-journal.org/articles/swsc/full_html/2024/01/swsc230047/swsc230047.html |
| _version_ | 1797202663456112640 |
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| author | Richard Erik Coddington Odele Harber Dave Chambliss Michael Penton Steven Brooks Keira Charbonneau Luke Peck Courtney Béland Stéphane Pilewskie Peter Woods Tom |
| author_facet | Richard Erik Coddington Odele Harber Dave Chambliss Michael Penton Steven Brooks Keira Charbonneau Luke Peck Courtney Béland Stéphane Pilewskie Peter Woods Tom |
| author_sort | Richard Erik |
| collection | DOAJ |
| description | The first implementation of NASA’s Total and Spectral Solar Irradiance Sensor (TSIS-1) launched on December 15th, 2017, and was integrated into the International Space Station (ISS) to measure both the total solar irradiance (TSI) and the solar spectral irradiance (SSI). The direct measurement of the SSI is made by the LASP Spectral Irradiance Monitor (SIM) and provides data essential to interpreting how the Earth system responds to solar spectral variability. Extensive advances in TSIS-1 SIM instrument design and new SI-traceable spectral irradiance calibration techniques have resulted in improved absolute accuracy with uncertainties of less than 0.5% over the continuous 200–2400 nm spectral range. Furthermore, improvements in the long-term spectral stability corrections provide lower trend uncertainties in SSI variability measurements. Here we present the early results of the TSIS-1 SIM measurements covering the first 5 years of operations. This time period includes the descending phase of solar cycle 24, the last solar minimum, and the ascending phase of solar cycle 25. The TSIS-1 SIM SSI results are compared to previous measurements both in the absolute scale of the solar spectrum and the time dependence of the SSI variability. The TSIS-1 SIM SSI spectrum shows lower IR irradiance (up to 6% at 2400 nm) and small visible increases (~0.5%) from some previous reference solar spectra. Finally, initial comparisons are made to current NRLSSI2 and SATIRE-S SSI model results and offer opportunities to validate model details both for short-term (solar rotation) spectral variability and, for the first time, the longer-term (near half solar cycle) spectral variability across the solar spectrum from the UV to the IR. |
| first_indexed | 2024-04-24T08:07:01Z |
| format | Article |
| id | doaj.art-56fcfdd925c4434fa176f989768986bc |
| institution | Directory Open Access Journal |
| issn | 2115-7251 |
| language | English |
| last_indexed | 2024-04-24T08:07:01Z |
| publishDate | 2024-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Journal of Space Weather and Space Climate |
| spelling | doaj.art-56fcfdd925c4434fa176f989768986bc2024-04-17T09:16:19ZengEDP SciencesJournal of Space Weather and Space Climate2115-72512024-01-01141010.1051/swsc/2024008swsc230047Advancements in solar spectral irradiance measurements by the TSIS-1 spectral irradiance monitor and its role for long-term data continuityRichard Erik0https://orcid.org/0000-0002-8160-5727Coddington Odele1https://orcid.org/0000-0002-4338-7028Harber Dave2Chambliss Michael3Penton Steven4https://orcid.org/0000-0002-9523-0364Brooks Keira5https://orcid.org/0000-0002-2780-9593Charbonneau Luke6Peck Courtney7https://orcid.org/0000-0002-7586-4220Béland Stéphane8https://orcid.org/0000-0003-1968-1777Pilewskie Peter9Woods Tom10Laboratory for Atmospheric and Space Physics (LASP), University of ColoradoLaboratory for Atmospheric and Space Physics (LASP), University of ColoradoLaboratory for Atmospheric and Space Physics (LASP), University of ColoradoLaboratory for Atmospheric and Space Physics (LASP), University of ColoradoLaboratory for Atmospheric and Space Physics (LASP), University of ColoradoLaboratory for Atmospheric and Space Physics (LASP), University of ColoradoLaboratory for Atmospheric and Space Physics (LASP), University of ColoradoLaboratory for Atmospheric and Space Physics (LASP), University of ColoradoLaboratory for Atmospheric and Space Physics (LASP), University of ColoradoLaboratory for Atmospheric and Space Physics (LASP), University of ColoradoLaboratory for Atmospheric and Space Physics (LASP), University of ColoradoThe first implementation of NASA’s Total and Spectral Solar Irradiance Sensor (TSIS-1) launched on December 15th, 2017, and was integrated into the International Space Station (ISS) to measure both the total solar irradiance (TSI) and the solar spectral irradiance (SSI). The direct measurement of the SSI is made by the LASP Spectral Irradiance Monitor (SIM) and provides data essential to interpreting how the Earth system responds to solar spectral variability. Extensive advances in TSIS-1 SIM instrument design and new SI-traceable spectral irradiance calibration techniques have resulted in improved absolute accuracy with uncertainties of less than 0.5% over the continuous 200–2400 nm spectral range. Furthermore, improvements in the long-term spectral stability corrections provide lower trend uncertainties in SSI variability measurements. Here we present the early results of the TSIS-1 SIM measurements covering the first 5 years of operations. This time period includes the descending phase of solar cycle 24, the last solar minimum, and the ascending phase of solar cycle 25. The TSIS-1 SIM SSI results are compared to previous measurements both in the absolute scale of the solar spectrum and the time dependence of the SSI variability. The TSIS-1 SIM SSI spectrum shows lower IR irradiance (up to 6% at 2400 nm) and small visible increases (~0.5%) from some previous reference solar spectra. Finally, initial comparisons are made to current NRLSSI2 and SATIRE-S SSI model results and offer opportunities to validate model details both for short-term (solar rotation) spectral variability and, for the first time, the longer-term (near half solar cycle) spectral variability across the solar spectrum from the UV to the IR.https://www.swsc-journal.org/articles/swsc/full_html/2024/01/swsc230047/swsc230047.htmlspectral irradiancesolar variabilitysolar spectrumsolar cycle |
| spellingShingle | Richard Erik Coddington Odele Harber Dave Chambliss Michael Penton Steven Brooks Keira Charbonneau Luke Peck Courtney Béland Stéphane Pilewskie Peter Woods Tom Advancements in solar spectral irradiance measurements by the TSIS-1 spectral irradiance monitor and its role for long-term data continuity Journal of Space Weather and Space Climate spectral irradiance solar variability solar spectrum solar cycle |
| title | Advancements in solar spectral irradiance measurements by the TSIS-1 spectral irradiance monitor and its role for long-term data continuity |
| title_full | Advancements in solar spectral irradiance measurements by the TSIS-1 spectral irradiance monitor and its role for long-term data continuity |
| title_fullStr | Advancements in solar spectral irradiance measurements by the TSIS-1 spectral irradiance monitor and its role for long-term data continuity |
| title_full_unstemmed | Advancements in solar spectral irradiance measurements by the TSIS-1 spectral irradiance monitor and its role for long-term data continuity |
| title_short | Advancements in solar spectral irradiance measurements by the TSIS-1 spectral irradiance monitor and its role for long-term data continuity |
| title_sort | advancements in solar spectral irradiance measurements by the tsis 1 spectral irradiance monitor and its role for long term data continuity |
| topic | spectral irradiance solar variability solar spectrum solar cycle |
| url | https://www.swsc-journal.org/articles/swsc/full_html/2024/01/swsc230047/swsc230047.html |
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