Frequently - Asked - Questions for ROC users.N.B.
- List of acronyms can be found in Acronyms and Definitions
- FAQ related to RPW calibration software (RCS) can be read in RCS-related FAQ
- FAQ for ROC developers can be found in ROC Developer FAQ
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The description of the RPW data products can be found in https://rpwissues.lesiacosmos.obspmesa.frint/rocsolarorbiterwiki/datadisplay/private/solo/rpw/docs/DPDD/ (restricted access)SOSP/Archive+Support+Data
Standards and metadata definitions for the RPW science data are presented in https://issues.cosmos.esa.int/solarorbiterwiki/display/SOSP/Metadata+Definition+for+Solar+Orbiter+Science+Data
Where I can find the RPW data produced by the ROC at LESIA ?
RPW public data are available with a 90-days latency from the Solar Orbiter Archive (SOAR) portal at ESAC (http://soar.esac.esa.int/soar/)
Copies of the RPW public data are also :
- At CDAWeb (https://cdaweb.gsfc.nasa.gov/index.html/)
- At LESIA (https://rpw.lesia.obspm.fr/roc/data/pub/solo/rpw/data/)
Preliminary Every RPW data file generated by the ROC at LESIA are saved within 48h in https://rpw.lesia.obspm.fr/roc/data/private/solo/rpw/data
Access to this site is restricted to authorized members only (see xavier.bonnin@obspm.fr for access).
RPW public data will be distributed after 3-months of proprietary period by ESA via the dedicated Web portal (http://soardev.esac.esa.int/soar-int/#home, dev. version). The distribution should start on Sept. 2020.
A copy of the RPW public data will be also available in https://rpw.lesia.obspm.fr/roc/data/pub/solo/rpw/data/
What is the Common Data Format (CDF)?
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* "PALISADE" version: "internal" version of the RPW used by the RPW flight software team at LESIA. PALISADE IDB versions are stored in https://version-lesia.obspm.fr/repos/SO-RPW/IDB/tags/ (restricted access)
Questions related to ancillary data (orbit, attitude, time, etc.)
Where I can find a description of the ancillary data for Solar Orbiter?
Solar Orbiter ancillary data are described in the document "SOC-Provided Ancillary Data for Solar Orbiter" (SOL-SGS-TN-0017).
This document can be retrieved from https://issues.cosmos.esa.int/solarorbiterwiki/display/SOSP/SOC-Provided+Ancillary+Data+For+Solar+Orbiter
N.B. Ancillary data are mostly provided as SPICE kernels. Visit https://naif.jpl.nasa.gov/naif/ for more details about SPICE.
Where I can find the ancillary data (SPICE kernels) for Solar Orbiter?
The SPICE kernels for Solar Orbiter are made available by ESA in https://www.cosmos.esa.int/web/spice/solar-orbiter
Copies of latest SPICE kernels received by ROC are saved in https://rpw.lesia.obspm.fr/roc/data/private/solo/soc/spice/kernels/ (restricted access)
How to read Solar Orbiter SPICE kernels with Python?
ROC uses spiceypy Python module to handle SPICE kernels.
The easiest way to load all kernels in one shot is to use metakernels (mk). mk files are included in the SPICE kernels set in the mk/ folder.
There are two mk files used to load predicted data (solo_ANC_soc-pred-mk.tm) and as-flown data (solo_ANC_soc-flown-mk.tm).
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import spiceypy
# Define paths to the MK files
predicated_mk_filepath = "solo_ANC_soc-pred-mk.tm"
asflown_mk_filepath = "solo_ANC_soc-flown-mk.tm"
# Predicated SPICE kernels should be loaded first
spiceypy.furnsh(predicated_mk_filepath)
# Then load as-flown SPICE kernels
spiceypy.furnsh(asflown_mk_filepath)
# Print out the toolkit version
spicepy.tkvrsn("TOOLKIT")
# At this stage Solar Orbiter SPICE kernels have been loaded and are ready to be used (visit spiceypy documentation site in https://spiceypy.readthedocs.io to learn more about module capabilities.) |
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How to convert on-bord time (OBT) to UTC time?
The Solar Orbiter SOC Team provides information for translating on-board time to UTC time in https://issues.cosmos.esa.int/solarorbiterwiki/display/SOSP/Translate+from+OBT+to+UTC+and+back
N.B. You need SPICE kernels to perform convertion (see related question here)
How to retrieve Solar Orbiter orbit digest CDF files ?
The SOC provides CDF files that contain Solar Orbiter location and speed in HEE and HCI coordinate systems.
These files are made available in the SOC Public Confluence page (https://issues.cosmos.esa.int/solarorbiterwiki/)
A copy of these files are also saved by the LESIA in https://rpw.lesia.obspm.fr/roc/data/private/solo/soc/spice/cdf/ (restricted access)
Where is Solar Orbiter spacecraft currently?
You can use the "where is solar orbiter" ESA's tool for a quick look of spacecraft trajectory over the Sun.