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10/11/2006 IASI : Current profiles 1 Purpose èFollowing the SVM shunt11 anomaly, ASTRIUM EF requests the instrument current behaviour, for what concerns.

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Presentation on theme: "10/11/2006 IASI : Current profiles 1 Purpose èFollowing the SVM shunt11 anomaly, ASTRIUM EF requests the instrument current behaviour, for what concerns."— Presentation transcript:

1 10/11/2006 IASI : Current profiles 1 Purpose èFollowing the SVM shunt11 anomaly, ASTRIUM EF requests the instrument current behaviour, for what concerns the ripples èTwo approaches were undertaken for IASI instrument : ÔRetrieve the measurements obtained during instrument testing (vacuum test) ÔSimulate what are the profiles of the ATC and decontamination lines based on the acquired data over the orbit

2 10/11/2006 IASI : Current profiles 2 Retrieve of the measurements obtained during instrument testing èALCATEL document : ÔIASI EMC qualification analysis : ÙIA-AR AER v3.0 ÔIASI exported current ripple : Ùdated on the 09/11/2006 èFor example : Ô

3 10/11/2006 IASI : Current profiles 3 Simulation of the profiles (1/2) èMathematical models were developed in order to simulate the current for each ATC and Decontamination lines taking into account the voltage, PWM values over one orbit (10 sets) for the Decontamination mode (04/11/2006) èFor example : Decontamination

4 10/11/2006 IASI : Current profiles 4 Simulation of the profiles (2/2) èFor example : Deployment

5 10/11/2006 IASI : Current profiles 5 Conclusion èMaximum simulated values are consistent with the measurements performed during tests for Heater 1 and Decontamination modes èThe IASI ripple is 1 Hz signal èDuring Decontamination, the ATC lines are activated and ALL 6 DEC lines are activated èDuring deployment, the ATC lines are activated and ONLY 1 SMA line is activated èFor IASI modes higher than Heater1, please refer to the “IASI EMC qualification analysis” (IA-AR AER v3.0) document Numerical inputs could be provided if needed : Cf. IASI_Current_inputs to METOP_ xls


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