T SPP1788 “DynamicEarth“ Workshop, GFZ Potsdam, 3 July 2014 No. 1 Calibration/Validation of Swarm Data Products: German activities Hermann Lühr and Cal/Val Team

T SPP1788 “DynamicEarth“ Workshop, GFZ Potsdam, 3 July 2014 No. 2 AO released in August 2011

T SPP1788 “DynamicEarth“ Workshop, GFZ Potsdam, 3 July 2014 No. 3  A number of German institutions had announced their interest in validating the Swarm data products.  A common proposal for data validation, coordinated by the Swarm Project Office, was submitted to ESA in October  This proposal was approved to full extent by ESA in February  In response to this success the DLR Space Administration showed their willingness to partially support the Cal/Val activities.

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Proposal of German User Community to the ESA Validation / Data Exploitation Opportunity Validation of Swarm L-1b Products in the Topic Areas of GEOMAGNETIC FIELD Vincent Lesur, Martin Rother

Euler Angle Estimations The nominal orientation of the vector data with respect to the star sensor readings is based on calibrations run on ground prior to the launch. However, our experience from Ørsted and CHAMP satellite missions is that the orientation parameters have to be re-estimated after launch. These are the so-called “Euler-angles” between the vector magnetic data in the instrument frame and the celestial system of reference associated with the star cameras. We plan therefore to use our experience and apply the tools developed during the CHAMP satellite mission, to address this problem of Euler angles determination. Optical bench on Swarm, with three STR and a single VFM.

Swarm Validation Workshop March 28 th, 2014, ESRIN 7/11 Swarm Science and Data Validation: Ionosphere/Thermosphere Team members: Dr. Adrian BlagauJacobs University, Bremen & Inst. for Space Sciences (ISS), Bucharest Prof. Jorge ChauLeibniz-Institute of Atmospheric Physics (IAP), Kühlungsborn Dr. Matthias FörsterGFZ German Research Centre for Geosciences, Potsdam Dr. Octav MarghituInstitute for Space Sciences (ISS), Bucharest Jens MielichLeibniz-Institute of Atmospheric Physics (IAP), Kühlungsborn/Juliusruh Dr. Gunter StoberLeibniz-Institute of Atmospheric Physics (IAP), Kühlungsborn Prof. Joachim VogtJacobs University, Bremen

Swarm Validation Workshop March 28 th, 2014, ESRIN 8/11 Swarm Science and Data Validation: Ionosphere/Thermosphere Aims at Level 1B Swarm data validation by various means, which complement each other. They comprise both direct comparison with different independent observations and plausibility tests of multi-point data applied to basic electrodynamic equations. Validation tasks in particular:  Direct comparison of plasma measurements during overflights with ground-based observations (Digisonde Juliusruh/Rügen, radars)  Ion drift measurements (EFI) at mid- and high-latitudes related to various independent observations: incoherent scatter radars (e.g. EISCAT), Digisonde Juliusruh; coherent radars (e.g., PolarDARN)  Validation of multi-point gradient estimation techniques for three satellites' constellation

Validation of SWARM Level 1b Products: Geodesy Roland Pail (Co-PI), Urs Hugentobler (Co-PI), Anja Schlicht, Nadja Peterseim Validation of: Star trackers Accelerometer Orbits … based on the lessons learnt from GOCE, GRACE, CHAMP

T SPP1788 “DynamicEarth“ Workshop, GFZ Potsdam, 3 July 2014 No. 10 Summary  The German Cal/Val activities cover all the prime Swarm objectives: Magnetometry, Ionosphere/Thermosphere, Geodesy.  Information about instrument performance may be obtained after some time from the topic coordinators:  The active Swarm Cal/Val phase has started last month and is scheduled for one year for the German groups. Dr. Vincent Lesur, GFZ Prof. Joachim Vogt, Jacobs University Bremen Prof. Roland Pail, TU München

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