NSSDCA ID: PSSB-02560
Availability: Archived at NSSDC, accessible from elsewhere
This description was generated automatically using input from the Planetary Data System.
Data Set Overview ================= The data from the ROSETTA PLASMA CONSORTIUM (RPC) Fluxgate Magnetometer(MAG)was submitted by Ingo Richter (TM) for the RPCMAG team. The PI of the team is Karl-Heinz Glassmeier. The data have been measured during the RENDEZVOUS MANOEUVRE 1 Phase of the ROSETTA mission. Included are the following time intervals: -November 22 - November 30, 2010 RPC was switched on for a S/W patch . Only Housekeeping data are available -December 6, 2010 This was the Payload Checkout #13 (PC13). All magnetic field data are calibrated data. That means the data represent the 3 components of the magnetic field measured in physical units (nT). Data are given in instrument coordinates (LEVEL_A), S/C coordinates (LEVEL_B) or ECLIPJ2000 coordinates (LEVEL_C). Calibration has been applied according to the Ground calibration results which means: - temperature dependent offset calibration - temperature dependent sensitivity calibration - temperature dependent misalignment calibration Bad vectors have been removed. Any s/c generated noise and s/c caused residual magnetic fields are not eliminated. The ground temperature model for the sensor calibration has been improved (expanded for a wider temperature range down to - 130 deg C) using long term temperature model obtained from flight data. The data are sorted by the sensor (OB: outboard sensor, IB: inboard sensor)and the measurement mode (M1..M6). They can uniquely be identified by their file names. Normally the OB is the Primary (Pri) and the IB is the Secondary (Sec) sensor. However, this order can be toggled by TCs. This feature has been tested especially during the commissioning phases. In cases where the PRIMARY and SECONDARY sensor were toggled the individual data files (OB/IB) will contain data measured with different sampling rates according to the actual sampling rates of the PRIMARY and SECONDARY sensors. Refer to the MODE DESCRIPTION table below. The actual sampling rate is the only indicator showing which sensor is the primary and which is the secondary one. REMARK: ======= Due to strong magnetic disturbance by the ORBITER and by the LANDER Philae, the magnetic field data are influenced by s/c generated magnetic fields. The source of these disturbance is manifold: - transient currents flowing on the spacecraft - Heater pulses - Thruster related magnetic field - Reaction wheel signatures - etc. Due to the complexity of these circumstances a proper data cleaning is an ongoing task. Thus the data of the present dataset still contain the mentioned disturbance signatures. Therefore, any use of the data for scientific research has to be done under consideration of these disturbances. REMARK ON TIMING ================ It turned out that the OB data are shifted against IB data and also against ROMAP data by 1s. This behavior has not been corrected in the data. Therefore, for proper comparison in high resolution analyses, a time shift of 1s should be subtracted from all OB data. Alternatively OB data can be left as they are and a 1s shift had to be added to the IB and ROMAP data. LEVEL Description, Science Data =============================== LEVEL_A : Calibrated data in INSTRUMENT coordinates (Unit Reference frame) Table content: Time (UTC), Time(OBT), Magnetic Field (Bx, By, Bz) [nT], Sensor Temperature [K], Quality Flags LEVEL_B : Calibrated data in s/c-coordinates Table content: Time (UTC), Time(OBT), Magnetic Field (Bx, By, Bz) [nT], Sensor Temperature [K], Quality Flags LEVEL_C : Calibrated data in ECLIPJ2000-coordinates Table content: Time (UTC), Time(OBT), Position (X,Y,Z) [km], Magnetic Field (Bx, By, Bz) [nT], Quality Flags LEVEL Description, Housekeeping Data ======================================= LEVEL_A : Calibrated Housekeeping data in Physical units Table Content: Time (UTC), Time (OBT), Temperatures (IB,OB) [K], Stage_IDs (Flag A,Flag B), Filter Config Flag, Voltages (Mag_Ref (2.5V), Mag_Neg (-5V), Mag_Pos (+5V)) [V], Magnetic Field (OB-X,OB-Y,OB-Z) [nT] (Instrument coord.), LEVEL_B : No HK Data LEVEL_C : No HK Data Mode description: ================= MODE SAMPLE RATE PACKET PERIOD PACKET LENGTH VECTOR RATE Minimum Mode M1 1/32 Hz 1024 s 32 Pri Vec 0.03125 vec/s 1 Sec Vec 0.000976 vec/s Normal Mode M2 1 Hz 32 s 32 Pri Vec 1 vec/s 1 Sec Vec 0.03125 vec/s Burst Mode M3 20 Hz 16 s 320 Pri Vec 20 vec/s 16 Sec Vec 1 vec/s Medium Mode M4 5 Hz 32 s 160 Pri Vec 5 vec/s 1 Sec Vec 0.03125 vec/s Low Mode M5 0.25 Hz 128 s 32 Pri Vec 0.25 vec/s 1 Sec Vec 0.007812 vec/s Test Mode M6 20 Hz 16 s 320 Pri Vec 20 vec/s 1 Sec Vec 0.0625 vec/s HK Mode 32 s 8 words 0.03125 vec/s The HK mode contains coarse magnetic field information, measured by the primary sensor with 16 bit resolution only. These data will not be calibrated and are not for any purpose. FILENAME CONVENTION & Mode Coding =================================== Due to operational constraints it might happen that the instrument mode or the primary sensor has to be switched during a specific observation. The actual mode and the primary sensor of the instrument can easily be identified by analyzing the filename of the actual data files. The complete filename convention is listed in the EAICD, chapter 3.1.4. The filenames for EDITED and CALIBRATED data are coded as follows: <inst> <begin of observation>_<level>_<sensor>_<inst mode>.<ext> RPCMAG yymmddThhmm RAW IB M1..M6 LBL CLA OB TAB CLB CLC Example: RPCMAG040528T1230_CLA_OB_M3.LBL RPCMAG040528T1230_CLA_OB_M3.TAB The filenames for Housekeeping data are coded as follows: <inst> <begin of observation>_<datatype>.<ext> RPCMAG yymmddThhmm HK LBL TAB Example: RPCMAG040528T1230_HK.LBL RPCMAG040528T1230_HK.TAB Geometry Information - Coordinate System ======================================== The geometry items SC_SUN_POSITION_VECTOR SC_TARGET_POSITION_VECTOR SC_TARGET_VELOCITY_VECTOR provided in the label of the data product are relative to the ECLIPJ2000 frame or. This reference frame is built up by Ecliptic Coordinates related to Equinox of Epoch J2000. Orientation: X: Pointing from SUN to Vernal Equinox, Y: perpendicular to X in Ecliptic Plane, Z: Perpendicular to Ecliptic plane, pointing up The items SUB_SPACECRAFT_LATITUDE SUB_SPACECRAFT_LONGITUDE are given in the PLANETOCENTRIC coordinate system. All these geometry parameters are computed at time t=START_TIME. Distances are given in km, angles in degrees. Version Information =================== The first version of RPCMAG datasets being archived for this comet phase and calibration level was V3.0. The actual version is V9.0. It features -improved offset calculation -new temperature calibration -s/c disturbance assessment -updated documentation -extended data flagging Scientific Background ===================== The following papers have either been published based upon RPC/RPC-MAG MAG data or contain basic information about cometary plasmaphysics. The listed papers may be useful in helping to understand the data and its usage: [GLASSMEIERETAL2007A],[HANSENETAL2007],[ACUNAETAL1992],[ALFVEN1957], [AUSTERETAL2007],[AUSTERETAL2015],[BEHARETAL2016],[BEHARETAL2017], [BIERMANN1951],[BURCHETAL2007],[CARRETAL2007],[COATESETAL1993], [EDBERGETAL2009],[EDBERGETAL2016],[EICHELBERGERETAL2002],[ERIKSSONETAL2007], [GLASSMEIER&NEUB1993],[GLASSMEIERETAL1993],[GLASSMEIERETAL2007B], [GLASSMEIER2016],[GOETZETAL2016A],[GOETZETAL2016B],[GOETZETAL2017], [GOETZETAL2018],[GOLDSTEINETAL2015],[GUNELLETAL2017],[HAJRAETAL2017], [HEDGECOCK1975],[HEINISCHETAL2016],[HEINISCHETAL2017],[HEINISCHETAL2018A], [HENRIETAL2017],[HUDDLESTONETAL1993],[JOHNSTONEETAL1993],[KOENDERSETAL2013], [KOENDERS2015],[KOENDERSETAL2016A],[KOENDERSETAL2016B],[KOLOKOLOVAETAL2016], [MADANIANETAL2016],[MANDTETAL2016],[MCKENNAETAL2016],[MEIERETAL2016], [MOTSCHMANN&GLASS1993],[NEMETHETAL2016],[NEUBAUER1981],[NEUBAUERETAL1983], [NEUBAUERETAL1993A],[NEUBAUERETAL1993B],[NEUHAUS2001],[NILSSONETAL2006], [NILSSONETAL2015],[NILSSONETAL2017],[OMERBEGOVIC1999],[OTHMER&RICHTER2001], [PLASCHKEETAL2017],[RICHTERETAL2011],[RICHTERETAL2011B],[RICHTER&RAHM2001], [RICHTER&CUPIDO2011],[RICHTERETAL2015],[RICHTERETAL2016], [SCHMIDT&WEGMANN1982],[SMITHETAL1993],[STENBERGWIESETAL2017],[SULIVAN2001], [TIMARETAL2017],[TROTIGNONETAL2007],[TROTIGNONETAL2009],[TSURUTANI&SMITH1986], [VIGRENETAL2017],[VOLWERKETAL2013],[VOLWERKETAL2014],[VOLWERKETAL2016], [VOLWERKETAL2017],[VOLWERK2018],[VOLWERKETAL2018],[WALLIS1973], [WINSKEETAL1985],[WITASSEETAL2017],[WU&DAVIDSON1972]. Additionally all documents in the present DOCUMENT folder provide precious and necessary information in order to understand the RPC-MAG data and to assess potential disturbances seen in the data.
These data are available on-line from the Planetary Data System (PDS) at:
https://pdssbn.astro.umd.edu/holdings/ro-ss-rpcmag-3-rvm1-calibrated-v9.0/
Questions and comments about this data collection can be directed to: Dr. David R. Williams
Name | Role | Original Affiliation | |
---|---|---|---|
Prof. Karl-Heinz Glassmeier | Data Provider | Technische Universitat Braunschweig | kh.glassmeier@tu-braunschweig.de |
Dr. Ingo Richter | General Contact | Technische Universitat Braunschweig | i.richter@tu-bs.de |