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Microwave Limb Sounder


The Microwave Limb Sounder (MLS) experiments measure naturally-occurring microwave thermal emission from the limb (edge) of Earth's atmosphere to remotely sense vertical profiles of atmospheric gases, temperature, pressure, and cloud ice. The overall objective of these experiments is to provide information that will help improve our understanding of Earth's atmosphere and global change.


Start Date
End Date
N2O GPH Temperature HNO3 All


Current GMT day:    
Maps @ 46hPa; SO2 @ 147hPa and CO @ 215hPa

Latest Publications

  1. Rüfenacht, R., G. Baumgarten, J. Hildebrand, F. Schranz, V. Matthias, G. Stober, F. Lübken, and N. Kämpfer, "Validation of middle-atmospheric wind in observations and models," Atmospheric Measurement Techniques Discussions, 1-31, doi:10.5194/amt-2017-390, in review.

  2. Matthias, V., and M. Ern, "On the origin of the mesospheric quasi-stationary planetary wavesin the unusual Arctic winter 2015/16," Atmos. Chem. Phys. Discuss., 1-20, doi:10.5194/acp-2017-1051, in review.

  3. Zülicke, C., E. Becker, V. Matthias, D. Peters, H. Schmidt, H. Liu, L.D.l.T. Ramos, and D. Mitchell, "Coupling of stratospheric warmings with mesospheric coolings in observations and simulations," J. Climate, doi:10.1175/jcli-d-17-0047.1, in press.

  4. Lu, X., X. Chu, C. Chen, V. Nguyen, and A. Smith, "First Observations of Short-Period Eastward Propagating Planetary Waves From the Stratosphere to the Lower Thermosphere 110 km in Winter Antarctica," Geophys. Res. Lett. 44, 20, 10,744-10,753, doi:10.1002/2017gl075641, in review.

  5. Sakazaki, T., M. Fujiwara, and M. Shiotani, "Representation of solar tides in the stratosphere and lowermesosphere in state-of-the-art reanalyses and in satelliteobservations," Atmos. Chem. Phys. Discuss., 1-42, doi:10.5194/acp-2017-750, in review.

> More Publications

New MLS v4.2 NRT Data Products Released

The science team for the Microwave Limb Sounder (MLS) on the Aura satellite and the Goddard Earth Sciences Data and Information Services Center (GES DISC) are pleased to announce the release of the new MLS near-real-time (NRT) Version 4.2 data products. This upgrade increases the vertical height range of the NRT temperature product to provide additional coverage in the upper stratosphere/ lower mesosphere (up to 0.001 hectoPascals).

For those currently using the version 3 NRT products, it is expected to continue to be produced in parallel with version 4 NRT for the next several months, nominally until 1 April 2018, at which time the v3 NRT processing will be discontinued. Please contact us if you require more time to transition from the v3 to the v4 NRT stream.

Note that the version 4 NRT data will only be available in a forward processing stream and that older data will not be routinely re-processed. For users wishing to acquire a batch of v4 data for testing purposes, the MLS science team can provide on request a limited set of 'rolled-up' daily v4 NRT files from 25 September 2017 until present.

For additional information, please see the full announcement.

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