RO-C-RPCIES-2-EXT3

Data Set Overview The following describes the nature of instrument operation during the various periods for which IES data are available in this submission. In all cases the data are raw electron and ion counts as function of energy, azimuth (direction in the instrument symmetry plane) and ^ation (angle above or below the symmetry plane). During this phase Rosetta traversed distances between approximately 0 (at impact) to 26 km to the comet, performing terminator and other trajectories. IES observed solar wind ions and electrons as well as the low energy (~20 eV) ions attracted to the S/C when it was at a negative potential. Very few other cometary ions were observed. Nor could cometary electrons be distinguished from solar wind electrons. IES operated continuously during this period. Processing All Rosetta Plasma Consortium (RPC) data packets are transmitted together during downlinks with Rosetta. RPC data are retrieved from the Data Distribution System (DDS) at European Space Operations Centre (ESOC) to a central RPC data server at Imperial College London. Data for IES is copied from the RPC central data server by IESGS at Southwest Research Institute. The pipeline processing software is the IES Ground System (IESGS). IESGS extracts IES CCSDS packets from the RPC collective data files stored on the RPC central data server at Imperial College. These packets are used to build ion and electron data products. The data products are grouped by date and written out to PDS compliant archive data files. One data file is created for each day. IESGS also generates the labels for the archive data files. IES science products, archive and label files, and limited spectrograms are available to team scientists on the IESGS website. Coordinate System In order to determine IES pointing, attitude data for the Rosetta spacecraft is obtained through SPICE kernels and converted from the J20 truncated!, Please see actual data for full [truncated!, Please see actual data for full text]