NSSDCA ID: PSSB-02269
Availability: Archived at NSSDC, accessible from elsewhere
This description was generated automatically using input from the Planetary Data System.
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 ion and electron density, temperature, and velocity moments. Rosetta Extension 2 (EXT2) covers the period from 2016-April-06 to 2016-June-30. IES observed solar wind plasma through most of this phase. IES also detected heavier solar wind ions, alphas and singly charged Helium populations. During this phase, IES measured electrons generally below 500 eV. IES detected negative ions from the once solar wind protons population. 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. For information on how the calibrated data files are created from edited data files, please see DOCUMENTFLUX_CALCULATION FLUX_CALCULATION.PDF. For information on how the derived data files are created from calibrated data files, please see DOCUMENTMOMENTS_CALCULATION MOMENTS_CALCULATION.PDF. Coordinate System ================= In order to determine IES pointing, attitude data for the Rosetta spacecraft is obtained through SPICE kernels. Level 5 files use Comet-centered Solar EQuatorial (CSEQ) as the reference frame to specify the velocity direction components. This is a common frame used in many other data sets and is referenced as '67P/C-G_CSEQ' in SPICE. SUB_SPACECRAFT_LATITUDE, SUB_SPACECRAFT_LONGITUDE are given in the Cheops reference frame. These parameters are computed at time t=START_TIME. Distances are given in km, angles in degrees.
These data are available on-line from the Planetary Data System (PDS) at:
https://pdssbn.astro.umd.edu/holdings/ro-c-rpcies-5-ext2-v1.0/
Questions and comments about this data collection can be directed to: Dr. David R. Williams
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. James L. Burch | Data Provider | Southwest Research Institute | jburch@swri.edu |
Dr. Brad Trantham | General Contact | Southwest Research Institute | btrantham@swri.org |