Laboratoire de Physique des Plasmas 20 TH CAA CROSS-CAL M EETING CLUSTER-STAFF REPORT O CTOBER 2014 G ÖTTINGEN The STAFF Team Laboratoire de Physique des Plasmas Ecole Polytechnique, France

Plan 1.Team 2.Software Status 3.Deliveries 4.Calibration: on going 5.Calibration Issues 220th CAA Cross-Cal Meeting October 2014

STAFF Operation Team LPP - Palaiseau – P. Canu (PI), N. Cornilleau (deputy PI), – P. Robert retired on May 2014 – V. Bouzid now head of computer department at LPP Still 40% on CSDS software implementation at LPP – K. Musatenko, Cnes contract,operations, validation, CSDS production – R. Piberne CAA engineer obtained permanent position at LPP Will work 50% of time for Cluster, mainly CAA – Ralph Katra new CAA engineer since September 1 Still training on data production – Software development LESIA -Observatoire de Meudon (Staff-SA) - O. Alexandrova - Q. N. Nguyen. Institute of Atmospheric Physic, Prague - O. Santolik, B. Grison With great help of Keith Yearby and DWP team at Sheffield 20th CAA Cross-Cal Meeting October 20143

1. Status of software development STAFF-SC DWF, CWF-GSE,CWF-ISR2,CS, Graphics, HK All production software completed and running STAFF-SA L2 - Upgrade to new calibration tables and data free from negative values due to overflow in the auto products: completed and tested - Staff status included and on-board calibration data removed Last checks underway to validate status: small timing discrepancy between SC an SA value, now understood PPP: Small software upgrade to exclude periods without FGM data 420th CAA Cross-Cal Meeting October 2014

CAA Delivery Despite non optimal hardware configuration and team changes most of the planned activities and deliveries for this year have been fullfilled STAFF-SC: – Calibrated Waveform GSE fully delivered ( ) – Production chain for CWF in ISR2 completed and tested, production underway, delivered – Calibrated spectra reprocessed with upgraded production chain, fully delivered ( ) – Digital Waveform reprocessed and delivered ( ) Move common status to caveats STAFF-SA: – L2 up to Reproduction of full data set (PSD,SM,AGC) is a bit late, but has low priority. Should run in coming weeks after status validation – PPP up to Will be reproduced with upgraded FGM files and excluding periods without FGM 520th CAA Cross-Cal Meeting October 2014

3. Status of dataset delivery Product DWFDDDDDDDDDDDDDP CWF_ISR2DDDDDDDDDDDDDP CWF_GSEDDDDDDDDDDDDDP CSDDDDDDDDDDDDDP SC_SPECTRODDDDDDDDDDDDDP AGCDDDDDDDDDDDD PSDDDDDDDDDDDDD SMDDDDDDDDDDDD PPPDDDDDDDDDDDDD HKDDDDDDDDDDDDD CAVEATS DATASETS NOTSRPDDDDDDDDDDDD PSDNEGDDDDDDDDDDDD UNDEFINED_MFADDDDDDDDDDDDD CALIBRATIONDDDDDDDDDDDDD D = delivered [number indicates version] P = partial delivery R = (ongoing) reprocessing 620th CAA Cross-Cal Meeting October 2014

4. Delivery Plan Year of delivery Product SC DWF-End 2014 – 1st half 2015 SC Complex spectra-End 2014 – 1st half 2015 SC Images-End 2014 – 1st half 2015 SC CWF GSE-End 2014 – 1st half 2015 SC CWF ISR2-End 2014 – 1st half 2015 SA AGC / PSD / SM/ BE products New version st half 2014 End 2014 – 1st half 2015 SA Polarisation/Propagation1st half 2014End 2014 – 1st half 2015 House Keeping plots th CAA Cross-Cal Meeting October 2014

Calibrated data: On going 20th CAA Cross-Cal Meeting October The GI article CLUSTER STAFF search coils magnetometer calibration comparisons with FGM is published and available here: From Progress meeting: Many minor anomalies in delivered CWF – CS files, due to - Bad telemetry, bad status - Telemetry holes Which induced missing CWF,CS or non usable data These anomalies are seldom and short period. Bad data will be removed from CAA and reason for missing calibrated data will be justified in STAFF documentation

Calibration issues: Next step 920th CAA Cross-Cal Meeting October 2014 We begin to receive feedback from users of calibrated data Spurious lines ? Spin not fully removed Differences found between old calibrated data (sometimes published) and the new improved Calibrated WaveForm (CWF) …… Answers to these standard questions should be included in CAA documentation - Provide more details on the limit of use - Provide examples on the impact of the parameters used in CWF production and possible misinterpretation - Provide suggestions for getting better quality data with respect to studies

Calibration issues: next step -2 Most of the questions raised by CWF users were expected – Search-coils transfer function is frequency dependant and data are affected by strong spin induced signal coming from B – Signal processings used in calibration (window, FFT) induce edge effects – Producing good quality calibrated data requests stationarity (ie B vector,EM field) over the period of analysis (ie many spins) which is not typical of some Cluster studies. – New CWF significantly reduced edge effects but – The parameters used to produce CWF (window size for despin, filtering, …) is a compromise which will not fulfill all users-studies needs 20th CAA Cross-Cal Meeting October

Calibration issues: next step - 3 Initial proposal of STAFF team to CAA was to provide DWF (uncalibrated) and calibration software Provision of Calibrated Wave Form was a known compromise We have to overcome CWF limits by - Including clear warnings in the documentation – Providing our calibration software to CAA-CFA Patrick Robert suite of Fortran routines – Need some effort to implement for a standard user Consider running these sofware at CFA 20th CAA Cross-Cal Meeting October