Download presentation
Presentation is loading. Please wait.
Published byPhoenix Starn Modified over 10 years ago
1
4 th Swarm DQW – Magnetic Session 23 Dec 2014Potsdam (D) ELM – “EXTENDED” LESUR MODEL OF DISTURBANCE CHARACTERISATION AND VFM CALIBRATION Lars Tøffner-Clausen, Nils Olsen, Peter Brauer DTU Space special thanks to Vincent Lesur
2
4 th Swarm DQW – Magnetic Session 23 Dec 2014Potsdam (D) Model Parameterisation Vector field disturbance at VFM sensor “Vincent Lesur model”: Solar angle dependent, spherical harmonic model to d/o 30, including static part No time varying bias VFM instrument sensitivity Static part, one value for each axis Time-dependent part, linear, one common value for all three axes Sensor temperature dependent part, linear, one value for each axis (small correction to pre-flight values) No non-orthogonality corrections
3
4 th Swarm DQW – Magnetic Session 23 Dec 2014Potsdam (D) Swarm C Results
4
4 th Swarm DQW – Magnetic Session 23 Dec 2014Potsdam (D) Swarm A Results
5
4 th Swarm DQW – Magnetic Session 23 Dec 2014Potsdam (D) Swarm A Numbers Static bias: b = (0.7033 -1.9407 0.0323) Sensitivities: Static: s 0 = 1 + (99.08 64.19 -27.89) × 10 -6 Temporal: s t = -79.4 × 10 -6 /year Temperature: s Tsensor = (0.9864 0.6030 0.6980) × 10 -6 /°C
6
4 th Swarm DQW – Magnetic Session 23 Dec 2014Potsdam (D) What next? Add fit of non-orthogonalities Further analysis of temporal evolution of VFM sensitivity Assessment of required input data span to obtain accurate vector disturbance model solution
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.