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New release of improved Swarm acceleration and thermosphere density data

18 September 2017

We are pleased to announce a new release of non-gravitational acceleration and thermosphere neutral density data, which was derived from the measurements of the GPS receiver. The non-gravitational acceleration data was produced with a newly developed method that improves the data quality. This improvement extends to the thermosphere neutral density data, which directly depends on the non-gravitational acceleration data. In addition, the aerodynamic modeling of the spacecraft was refined, further improving the quality of the thermosphere neutral density data.

The thermosphere neutral density is presently decreasing to a very low level as the solar minimum is approaching. Since this leads to a low signal-to-noise ratio for the measured density despite the improvements in the processing, the orbital average density is included in the data.

The non-gravitational acceleration and thermosphere neutral density data is contained in the ACCxPOD_2 version 0201 and DNSxPOD_2 version 0102 products and located in the following directories:

  • /Level2daily/Latest_baselines/ACC/POD/
  • /Level2daily/Latest_baselines/TDW/POD/

The data is now available for the period from 19 July 2014 to 31 August 2017 for all three Swarm spacecraft and will be updated on a weekly basis.