Day 4

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Paper title Quality Assessment and Features of the CASSIOPE/ePOP MGF product
  1. Martin Rother Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum GFZ Speaker
  2. David Miles University of Iowa
  3. Robert M. Broadfoot University of Iowa
  4. Andrew Howarth University of Calgary
  5. Warren Holley University of Calgary
Form of presentation Poster
  • B2. Earth Explorer missions
    • B2.05 Swarm - ESA's Extremely Versatile Magnetic Field and Geospace Explorer
Abstract text Satellite CASSIOPE (CAScade, Smallsat and IOnospheric Polar Explorer, a made-in-Canada small satellite from the Canadian Space Agency), was launched in September 2013 and with the ePOP (The Enhanced Polar Outflow Probe) payload meanwhile supposed to act as an additional satellite in the Swarm constellation, as Swarm-Echo. In focus here are the data from the MGF instrument (magnetic field). The MGF group lead by David Miles are preparing a new calibrated, full data set in a Swarm L1b CDF lookalike format. The three test periods of MGF 1 Hz test data (for 2016, 2019 and 2021) delivered in late summer 2021 were examples periods -- distinguished by the failures of a first and a second attitude control wheel. This poster will try to evaluate the quality and features of any new MGF data sets going to be available and compare data on good and disturbed, older and newer periods. Challenging will be the yet in detail uncharted influence of the satellite itself -- and the status reached in respect of the crucial attitude control of the satellite after the failure of the second wheel. First task will be a mostly technical look into properties and quality of the available data (in focus are are the distribution of the given flags and their link to the data quality, stage of calibration and housekeeping records). With the help of the dual-magnetometer MGF configuration (the sensors are mounted in different distances to the satellite body on a, even short boom) the stray field sources of the satellite itself can be probed, in particular the power system like battery current or solar cell currents and voltages seems significant. In a second task, the limits of the given MGF-data usability are to be explored -- in combination and in comparison with other Swarm magnetic field readings -- for dedicated inversion tasks, presumably helping on covering local times: may be to support characterizing the external field or for short-period core-field estimations. This may be a valuable
survey to grant usability of the data set for further scientific purposes.