Status update of ASM on Swarm Charlie Swarm

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Status update of ASM on Swarm Charlie Swarm 4 th DATA QUALITY WORKSHOP 2

Status update of ASM on Swarm Charlie Swarm 4 th DATA QUALITY WORKSHOP 2 December 2014 GFZ Potsdam Jean-Michel Léger

Presentation outline Cliquez pour modifier le style du titre § Overview of ASM-A &

Presentation outline Cliquez pour modifier le style du titre § Overview of ASM-A & ASM-B operations on Swarm Charlie § Anomaly on 05/11/2014 § Summary of investigations carried out up to now § Investigation commission by ESA/CNES/Leti Swarm 4 th DATA QUALITY WORKSHOP 2 -5 December 2014 GFZ Potsdam |2

FM 3 A Cliquez Switch-on after launchle (noise pour modifier styleissue) du titre OK

FM 3 A Cliquez Switch-on after launchle (noise pour modifier styleissue) du titre OK OK vector NOK scalar OK vector NOK OK OK vector burst scalar Vector with modulations OFF § The vector mode is achieved BUT the ASM noise level indicator is degraded Historique et(x 4 -5) projets en cou 2 but 2 Trs when compared to scalar and burst mode UNEXPLAINED, not considered as critical (still well below the mission specifications for the scalar measurements resolution) NOK Swarm 4 th DATA QUALITY WORKSHOP 2 -5 December 2014 GFZ Potsdam |3

Switch-on launch Cliquez pourafter modifier le (FM 3 B style du. KO) titre §

Switch-on launch Cliquez pourafter modifier le (FM 3 B style du. KO) titre § FM 3 B switched on to take advantage of the vector mode nominal Historique et projets eneven cou 2 performances failure to detect the magnetic resonance, in the 2 Trs backup mode without motor § All diagnostic modes except ‘mag. Res’ OK RF sub-system at the origin of the problem Swarm 4 th DATA QUALITY WORKSHOP 2 -5 December 2014 GFZ Potsdam |4

Events ASM-Clesince Cliquez pour on modifier stylelaunch du titre Historique et projets en cou

Events ASM-Clesince Cliquez pour on modifier stylelaunch du titre Historique et projets en cou 2 2 Trs ASM model Event / Anomaly FM 3 A – SWARM Charlie VFM/ASM residuals characterization Yaw slews maneuvers performed from 12 to 14/05/2014 SWARM Charlie - ASM FM 3 A configuration ASM DPU identification DPU 9 ASM sensor ASM flight software ASM parameters table In-flight updates S 9 LV 7. 7 SW-CEA-MAG-TECHR-036 v 1. 4 (Break mode duration = 0 and Default mode = Vector) May 2014: Modifications in RAM of the following items have been (re)performed in RAM: re-definition of the HK-Observables packet generation rate to 1 Hz (15/05/2014) Level 0 FDIR action of Event. ID 2 disabled The anomaly ”TC’s no longer processed”, which first occurred on ASM FM 3 A on 28/12/2013 has led to an ASM flight software update from LV 5. 5 to LV 7. 7 on 24/04/2014 June to October 2014: None Swarm 4 th DATA QUALITY WORKSHOP 2 -5 December 2014 GFZ Potsdam |5

Anomaly onle 2014/11/05 Cliquez pour modifier style du titre Historique et projets en cou

Anomaly onle 2014/11/05 Cliquez pour modifier style du titre Historique et projets en cou 2 2 Trs § All signals are nominal prior to the failure, no evolution of any HK has occurred Swarm 4 th DATA QUALITY WORKSHOP 2 -5 December 2014 GFZ Potsdam |6

Recovery actions Cliquez pour modifier le style du titre § Several starting procedures launched

Recovery actions Cliquez pour modifier le style du titre § Several starting procedures launched at nominal, lower (0°C) and higher (30 °C) temperatures, all unsuccessful § Same behaviour, but power consumption slightly dependent on temperature (increasing with temperature) but always below expectations (about 10 to 15 m. A) SWARM Charlie FM 3 A Date 26/11/2013 -09: 39 04/12/2013 -14: 11 03/01/2014 -11: 29 24/04/2014 -07: 51 (passage en BOOT, MAJ LV 7. 7) 05/11/2014 -09: 05 07/11/2014 -09: 05 11/11/2014 -08: 32 12/11/2014 -07: 57 Courant LCL PHT 00032 (A) BOOT P 1 BOOT P 2 0. 126 -0. 129 0. 185 -0. 195 0. 125 -0. 130 0. 185 -0. 195 0. 122 -0. 129 0. 188 -0. 194 Tension PCDU PHT 00062 (V) 32. 7 -33. 7 33. 2 -33. 6 -33 Puissance (W) BOOT P 1 BOOT P 2 4. 2 -4. 32 6. 14 -6. 36 4. 18 -4. 34 6. 27 -6. 52 4. 09 -4. 3 6. 21 -6. 46 Temp DPU TST 50080 (°C) [9 -12] [10 -14] [9 -12] 0. 121 -0. 128 0. 184 -0. 196 33. 6 -33 3. 99 -4. 24 6. 06 -6. 55 [9 -12] 0. 108 -0. 111 0. 105 -0. 109 0. 106 -0. 109 -0. 114 32, 2 3. 47 -3. 58 3. 39 -3. 52 3. 41 -3. 52 3. 50 -3. 67 [9 -12] [10 -12] [0. 2 -0. 4] [28 -30] Swarm 4 th DATA QUALITY WORKSHOP 2 -5 December 2014 GFZ Potsdam |7

Investigation Cliquez pour modifier le stylemeans du titre Historique et projets en cou 2

Investigation Cliquez pour modifier le stylemeans du titre Historique et projets en cou 2 2 Trs § In-flight, only the primary power consumption profile is available since no communication has been received from the instrument since the 05/11/14 event § On ground, 2 EMs (not fully representative), 1 EQM and 1 PFM are available for investigation. Restriction: no hardware modification on the PFM § Tests have been conducted on the EQM, without forcing hardware defaults -except for 29+ MHZ oscillator-, to check the various assumptions on the potential origin of the problem Swarm 4 th DATA QUALITY WORKSHOP 2 -5 December 2014 GFZ Potsdam |8

Ground testsleonstyle EQMdu 1/2 Cliquez pour modifier titre Historique et projets en cou 2

Ground testsleonstyle EQMdu 1/2 Cliquez pour modifier titre Historique et projets en cou 2 2 Trs Power consumption profile observed on the EQM during the boot mode Swarm 4 th DATA QUALITY WORKSHOP 2 -5 December 2014 GFZ Potsdam |9

Ground testsleonstyle EQM Cliquez pour modifier du 2/2 titre Historique et projets enobserved cou

Ground testsleonstyle EQM Cliquez pour modifier du 2/2 titre Historique et projets enobserved cou 2 power 2 Trs § The oscillator failure hypothesis is not consistent with the profiles § The nominal power consumption in boot mode should be higher than what has been measured on the FM 3 A after the anomaly: either parts of the digital core are not functional or it is not properly powered § No estimation of the consumption thanks to simulation in failure modes available § A test sequence including the generation of hardware defaults is difficult both to define (induced stress assessment has to be evaluated prior to any operation in order to prevent failure propagation effects) and to carry out (ERC 32/RAM/ASIC are highly integrated) Swarm 4 th DATA QUALITY WORKSHOP 2 -5 December 2014 GFZ Potsdam | 10

failurelelocalization Cliquez Potential pour modifier style du titre Historique et projets en cou 2

failurelelocalization Cliquez Potential pour modifier style du titre Historique et projets en cou 2 2 Trs Given the observed power consumption profile, the +3. 3 V power line or the digital core are the most likely candidates Swarm 4 th DATA QUALITY WORKSHOP 2 -5 December 2014 GFZ Potsdam | 11

Cliquez pour modifier. Current le stylestatus du titre § Several teleconferences have been organized

Cliquez pour modifier. Current le stylestatus du titre § Several teleconferences have been organized involving ESA, CNES, Astrium and Leti to propose and carry out recovery actions, with no positive outcome so far § As a consequence, no ASM data available for Swarm Charlie since the 05/11 § An investigation team of specialists from CNES, ESA and Leti has been set up, and should meet in the coming days in Toulouse (confidentiality issues solved) § It will be in charge of the coordination of all further analyses to identify the anomaly origin and potential mitigation actions Swarm 4 th DATA QUALITY WORKSHOP 2 -5 December 2014 GFZ Potsdam | 12