KPL/IK METIS Instrument Kernel =========================================================================== This instrument kernel (I-kernel) briefly describes and contains orientative information of the Field-of-View (FoV) and/or Field-of-Regard (FoR) of and the line of sight (boresight) of the Multi Element Telescope for Imaging and Spectroscopy (METIS) sensors. DISCLAIMER: This I-kernel should not be used as a reference for the instrument nor for data analysis for the FoVs will not be updated to reflect best known / calibrated FoVs, nor variation according to mode. Version and Date ----------------------------------------------------------------------------- Version 0.1 -- October 5, 2017 -- Marc Costa Sitja, ESAC/ESA Reviewed by SOLO SOC (Christopher Watson). Corrected FoV definition. Version 0.0 -- May 16, 2017 -- Marc Costa Sitja, ESAC/ESA Preliminary Version. References ----------------------------------------------------------------------------- 1. ``Kernel Pool Required Reading''. 2. ``Frames Required Reading''. 3. ``C-Kernel Required Reading''. 4. Solar Orbiter Spacecraft Frames Definition Kernel. 5. ``Metis Instrument for the Solar Orbiter Mission Experiment Interface Document – Part B'', METIS-OATO-ICD-001, G. Nicolini and the Metis team, Issue 5, Revision 0, 18th March 2017. Contact Information ----------------------------------------------------------------------------- If you have any questions regarding this file contact SPICE support at ESAC: Marc Costa Sitja (+34) 91-8131-457 mcosta@sciops.esa.int, esa_spice@sciops.esa.int or the Solar Orbiter Science Operations Center at ESAC: sol_soc@esa.int Implementation Notes ----------------------------------------------------------------------------- This file is used by the SPICE system as follows: programs that make use of this frame kernel must "load" the kernel normally during program initialization. Loading the kernel associates the data items with their names in a data structure called the "kernel pool". The SPICELIB routine FURNSH loads a kernel into the pool as shown below: FORTRAN: (SPICELIB) CALL FURNSH ( frame_kernel_name ) C: (CSPICE) furnsh_c ( frame_kernel_name ); IDL: (ICY) cspice_furnsh, frame_kernel_name MATLAB: (MICE) cspice_furnsh ( 'frame_kernel_name' ) PYTHON: (SPICEYPY)* furnsh( frame_kernel_name ) In order for a program or routine to extract data from the pool, the SPICELIB routines GDPOOL, GIPOOL, and GCPOOL are used. See [2] for more details. This file was created and may be updated with a text editor or word processor. * SPICEPY is a non-official, community developed Python wrapper for the NAIF SPICE toolkit. Its development is managed on Github. It is available at: https://github.com/AndrewAnnex/SpiceyPy Naming Conventions ----------------------------------------------------------------------------- Data items are specified using ''keyword=value'' assignments [1]. All keywords referencing values in this I-kernel start with the characters `INS' followed by the NAIF SOLO instrument ID code, constructed using the spacecraft ID number (-144) followed by the NAIF three digit ID number for one of the METIS data item. These IDs are as follows Instrument name ID -------------------- ------- SOLO_METIS_EUV -144410 SOLO_METIS_EUV_MIN -144411 SOLO_METIS_EUV_MAX -144412 SOLO_METIS_VIS -144420 SOLO_METIS_VIS_MIN -144421 SOLO_METIS_VIS_MAX -144422 The remainder of the name is an underscore character followed by the unique name of the data item. For example, the METIS HRI LYA boresight direction in the SOLO_METIS_EUV_MIN frame (see [2]) is specified by: INS-144411_BORESIGHT The upper bound on the length of the name of any data item identifier is 32 characters. If the same item is included in more than one file, or if the same item appears more than once within a single file, the latest value supersedes any earlier values. Overview ----------------------------------------------------------------------------- From [5]: The solar corona is the region connecting the Sun to the heliosphere, where the processes generating and driving the heliosphere occur. The major open issues in the understanding of the corona and the solar wind can be effectively addressed by performing multi-wavelength near-Sun coronal imaging with Metis, exploiting the unique opportunities offered by the Solar Orbiter mission profile. Such observations are crucial for answering fundamental questions concerning: 1) the origins of the fast and slow wind, 2) the sources of solar energetic particles, 3) the origin and early evolution of coronal mass ejections. Metis performs imaging of the solar corona in the visible (VL) and in the ultraviolet (UV). The Metis reference configuration consists of the following physical units; - Telescope, contains all the opto-mechanical elements and the detectors producing the Sun corona images in visible (VL) and UV light. - Metis Processing and Power Unit (MPPU), the electronics which manages the instrument operations, acquires and processes the data produced by the detectors, converts and distributes the power received from the spacecraft, and provides the data interface with the spacecraft. - Camera Power Converter (CPC) and High Voltage Unit (HVU), the electronics which supply low and high voltage power to the detectors for the visible light (VLDA) and for the UV light (UVDA) detector assemblies. - The Harness provides an electrical interconnection among all the Metis physical units. Mounting Alignment ----------------------------------------------------------------------------- Refer to the latest version of the Solar Orbiter Frames Definition Kernel (FK) [4] for the METIS reference frame definitions and mounting alignment information. METIS Apparent Field-of-View Layout ----------------------------------------------------------------------------- METIS is an externally occulted coronagraph designed for: broad-band polarization imaging of the visible K-corona (580-640 nm); narrow-band imaging of the UV corona in the HI Lyman-alpga, 121.6 nm line; in an annular FOV between 1.5 deg – 2.9 deg (half angle), corresponding to 1.6 and 3.0 solar radii when the perihelion is 0.28 AU. Because of this the METIS FoVs for each sensor are modeled as a ``Minimum'' and a ``Maximum'' circular FoV with aperture angles of 1.5 and 2.9 degrees. FOV Definition --------------------------------------------------------------------------- This section contains definitions for the METIS apparent FOVs. These definitions are provided in the format required by the SPICE TOOLKIT function GETFOV. The FoV definitions correspond to the NAIF Body Names: SOLO_METIS_EUV_MIN, SOLO_METIS_EUV_MAX, SOLO_METIS_VIS_MIN and SOLO_METIS_VIS_MAX. \begindata INS-144413_NAME = 'SOLO_METIS_EUV_MIN' INS-144413_BORESIGHT = ( -1.000, 0.000, 0.000 ) INS-144413_FOV_FRAME = 'SOLO_METIS_EUV_OPT' INS-144413_FOV_SHAPE = 'CIRCLE' INS-144413_FOV_CLASS_SPEC = 'ANGLES' INS-144413_FOV_REF_VECTOR = ( 0.000, 1.000, 0.000 ) INS-144413_FOV_REF_ANGLE = ( 1.5 ) INS-144413_FOV_ANGLE_UNITS = 'DEGREES' INS-144414_NAME = 'SOLO_METIS_EUV_MAX' INS-144414_BORESIGHT = ( -1.000, 0.000, 0.000 ) INS-144414_FOV_FRAME = 'SOLO_METIS_EUV_OPT' INS-144414_FOV_SHAPE = 'CIRCLE' INS-144414_FOV_CLASS_SPEC = 'ANGLES' INS-144414_FOV_REF_VECTOR = ( 0.000, 1.000, 0.000 ) INS-144414_FOV_REF_ANGLE = ( 2.9 ) INS-144414_FOV_ANGLE_UNITS = 'DEGREES' INS-144423_NAME = 'SOLO_METIS_VIS_MIN' INS-144423_BORESIGHT = ( -1.000, 0.000, 0.000 ) INS-144423_FOV_FRAME = 'SOLO_METIS_VIS_OPT' INS-144423_FOV_SHAPE = 'CIRCLE' INS-144423_FOV_CLASS_SPEC = 'ANGLES' INS-144423_FOV_REF_VECTOR = ( 0.000, 1.000, 0.000 ) INS-144423_FOV_REF_ANGLE = ( 1.5 ) INS-144423_FOV_ANGLE_UNITS = 'DEGREES' INS-144424_NAME = 'SOLO_METIS_VIS_MAX' INS-144424_BORESIGHT = ( -1.000, 0.000, 0.000 ) INS-144424_FOV_FRAME = 'SOLO_METIS_VIS_OPT' INS-144424_FOV_SHAPE = 'CIRCLE' INS-144424_FOV_CLASS_SPEC = 'ANGLES' INS-144424_FOV_REF_VECTOR = ( 0.000, 1.000, 0.000 ) INS-144424_FOV_REF_ANGLE = ( 2.9 ) INS-144424_FOV_ANGLE_UNITS = 'DEGREES' \begintext Platform ID ----------------------------------------------------------------------------- This number is the NAIF instrument ID of the platform on which the channels are mounted. For all channels this platform is the spacecraft. \begindata INS-144500_PLATFORM_ID = ( -144000 ) \begintext End of IK file.