DAA PEACE Status A. Fazakerley, B. Mihaljčić, I. Rozum, A. Lahiff, G. Watson, D. Kataria UCL Department of Space and Climate Physics Mullard Space Science Laboratory CAA Cross Calibration Meeting 15, UCL, UK, 19th April 2012

DAA Progress Summary: (1) Missing Data DS IDFS and DAA codes have been ported to the dedicated PEACE Operations computer system (“NAS”) DS IDFS data (3DF and RPAD) have been regenerated on the NAS using both the original and new raw IDFS datasets. (Just as for Cluster, we think there were problems leading to missing IDFS data on the SAN) These problems apparently lead to some confusion and an incorrect presentation on missing PEACE data at the previous (York) meeting Mullard Space Science Laboratory 2

DAA Progress Summary: (2) Production Software Testing Using the original raw dataset, we have generated DAA PITCH_SPIN for the full mission. As FGM science data from the new G version was not available (de-spiked etc) so we couldn’t make PITCH_SPIN for the “G” data yet A PhD student is working on a statistical study with DAA PITCH_SPIN data, which has the useful side-effect of providing a cost-effective way to identify possible problems with the dataset. Mullard Space Science Laboratory 3

DAA Progress Summary: (3) Summary Plots Summary plots of the IDFS data are being produced from the “original” and “reprocessed” datasets to assist in planning how to merge the datasets for DAA production purposes Due to continuing non-availability of DSDSWeb coverage for the mission, PEACE summary plots with some DSDS PP data included have been made available on the MSSL website Mullard Space Science Laboratory 4

DAA Progress Summary: (4) Calibration A study of these variations of MCP sensitivity with time has been completed, based on results from weekly MCP tests. The calibration study used magnetosheath density estimates from HIA as a relative cross-calibration, in the absence of absolute density values from WHISPER. The calibration files currently in the IDFS database do not contain this information, however work is in progress to transfer this knowledge to the calibration files. (Note the DAA PITCH_SPIN test dataset mentioned earlier will be regenerated later using the improved calibrations) Mullard Space Science Laboratory 5

DAA Open Work: (1)Decide how to combine the two raw datasets (include Status flag to show origin, possibly spin by spin) (2)Check how well DAA PEACE production software handles noisy data (e.g. does it ever lose synchronisation of high energy spins vs low energy spins) and improve codes where possible else provide Status flag warning of bad data (3)Develop validation software for 3DF (4)Produce, validate, deliver 3DF dataset (including fill files as appropriate) (5)Possible software modifications to use DAA produced high resolution magnetic field datasets in pitch angle production codes for IDFS and hence DAA PEACE files (6)Develop validation software for PITCH_SPIN (7)Produce, validate, deliver PITCH_SPIN dataset (including fill files as appropriate) (8)Provide improved spacecraft potential estimates where possible (needed for moments production) (9)Develop validation software for MOMENTS (10)Produce, validate, deliver MOMENTS dataset (including fill files as appropriate) (11)Following deliveries of these products, return to e.g. secondary code products (3DR, PAD) if resources allow (12) Provide DAA Documentation updates as needed Mullard Space Science Laboratory 6

7 Mission Operations History TC-1 Timeline Launch29 Dec 2003 Comm./non- EPOS Ops26 Jan – 01 Mar 2004 Last data28 Sep 2007 Re-entry14 Oct 2007 TC-2 Timeline Launch25 Jul 2004 Comm./non- EPOS Ops30 Jul - 06 Sep 2004 Major data gapAug-Dec 2007 Major data gapFeb-Mar 2008 Last data03 Aug 2008 There are “known” time intervals (sometimes > 1 day) for which data return was unsuccessful and the data is missing. Mullard Space Science Laboratory

8 Data Return History There are “known” time intervals (sometimes > 1 day) for which data return was unsuccessful and the data is missing. TC-1 Missing Days in latest PEA data red means DOMC reported a reason for no data that day (no reports after Oct 2005) 15-7 & 25 Feb 2004( pre-JSOC ops) 18 Jun Oct Dec Aug Oct Nov Feb May Jun Aug Feb Aug Sep Sep 2007 TC-2 Missing Days in latest PEA data red means DOMC reported a reason for no data that day (no reports after Oct 2005) 8-9 ;21-4 Oct ; 23; 27-29; Aug , 30 Sep Oct Dec , 13-7; 23-6 Feb ; Mar May Jul Aug 2007 and 08 Aug- 17 Sep Jan - 14 Feb 2008 and Mar May Jun Jul 2008 Mullard Space Science Laboratory

9 Checking if PEACE data exists, at times for which operations of PEACE were commanded We have determined the number of total seconds each day that we expect to get Science (SCI) and Housekeeping (HK) data based on commanding files in Double Star PIORs Note that during real time contacts we may get HK (including energy spectra summed over anodes). If the science data taken at those times is later lost, these data could be of some interest. As a rough measure of telemetry noise problems, we counted the number of seconds for which a selected HK parameter gave values that were different from the allowed values for that parameter. Mullard Space Science Laboratory

10 Checking if PEACE data exists, at times for which operations of PEACE were commanded TC-1 Data return checks on the original and new raw datasets, and comparing which has more data on each day Mullard Space Science Laboratory

11 TC-1: Housekeeping Data Assessment Reprocessed (G version, Sep 2011) Original (ABCDetc version Sep 2011) Change: Reprocessed minus Original Better Worse New version of raw data is more complete but in some cases the original is more complete; => some merging of the two is needed Mullard Space Science Laboratory

12 TC-1: Science Data Assessment Better Worse Expected data gap New version of raw data is more complete but in some cases the original is more complete; => some merging of the two is needed Reprocessed (G version, Sep 2011) Original (ABCDetc version Sep 2011) Change: Reprocessed minus Original Mullard Space Science Laboratory

13 TC-1: Noisy Data Assessment Worse Better At times when both original and raw datasets exist, we should compare the noise level and pick the least noisy Reprocessed (G version, Sep 2011) Original (ABCDetc version Sep 2011) Change: Reprocessed minus Original Mullard Space Science Laboratory

14 Checking if PEACE data exists, at times for which operations of PEACE were commanded TC-2 Data return checks on the original and new raw datasets, and comparing which has more data on each day Mullard Space Science Laboratory

15 TC-2: Housekeeping Data Assessment Better Worse Expected data gap After last contact Reprocessed (G version, Sep 2011) Original (ABCDetc version Sep 2011) Change: Reprocessed minus Original New version of raw data is more complete but in some cases the original is more complete; => some merging of the two is needed Mullard Space Science Laboratory

16 TC-2: Science Data Assessment Better Worse Reprocessed (G version, Sep 2011) Original (ABCDetc version Sep 2011) Change: Reprocessed minus Original Expected data gap After last contact New version of raw data is more complete but in some cases the original is more complete; => some merging of the two is needed Mullard Space Science Laboratory

17 TC-2: Noisy Data Assessment Worse Better Reprocessed (G version, Sep 2011) Original (ABCDetc version Sep 2011) Change: Reprocessed minus Original Expected data gap After last contact At times when both original and raw datasets exist, we should compare the noise level and pick the least noisy Mullard Space Science Laboratory