Improved estimates for neutral air temperatures at 90 km and 78°N using satellite and meteor radar data
A technique for using satellite‐derived temperatures to calibrate initial estimates of 90 km temperatures measured by meteor wind radar is presented. Temperatures derived from the Nippon/Norway Svalbard Meteor Radar, situated on Svalbard at 78°N, 16°E, are calibrated using data from the Aura spacecr...
| Published in: | Radio Science |
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| Main Authors: | , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
American Geophysical Union (AGU)
2010
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| Subjects: | |
| Online Access: | https://mural.maynoothuniversity.ie/1010/ https://doi.org/10.1029/2009RS004344 https://mural.maynoothuniversity.ie/1010/1/FM_Improved_estimates.pdf |
| Summary: | A technique for using satellite‐derived temperatures to calibrate initial estimates of 90 km temperatures measured by meteor wind radar is presented. Temperatures derived from the Nippon/Norway Svalbard Meteor Radar, situated on Svalbard at 78°N, 16°E, are calibrated using data from the Aura spacecraft’s Microwave Limb Sounder (MLS) experiment. The calibration was performed in a two‐step process: after an initial calibration of first‐guess temperatures, results were used to adjust the MLS values to reflect daily means rather than the 0200–1100 UT observation period of the satellite instrument; thereafter the calibration was repeated with the revised MLS temperatures. The resulting temperature time series represents a marked improvement on earlier results calibrated using hydroxyl emission and potassium/K‐Lidar observations, as the uncertainty is reduced from 17 to 7 K. These latest results represent a new step toward reliable and continual monitoring of upper mesosphere/lower thermosphere temperature. |
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