KPL/IK Juno JADE Instrument Kernel =============================================================================== This Instrument Kernel (IK) file contains parameters and FOV definitions for the JUNO Jovian Auroral Distributions Experiment (JADE) sensors. Version and Date ------------------------------------------------------------------------------- Version 0.1 -- June 15, 2017 -- Boris Semenov, NAIF Filled in Instrument Description based on [5]. Version 0.0 -- June 6, 2009 -- Boris Semenov, NAIF Initial Release. References ------------------------------------------------------------------------------- 1. Kernel Pool Required Reading 2. GETFOV, getfoc_c, cspice_getfov headers 3. JUNO FK file, latest version 4. JADE CDR Presentations 5. JADE PDS3 instrument catalog, INST_JAD.CAT, Rev 2014-Jul-01. Contact Information ------------------------------------------------------------------------------- Boris V. Semenov, NAIF/JPL, (818)-354-8136, Boris.Semenov@jpl.nasa.gov Implementation Notes ------------------------------------------------------------------------------- This file is used by the SPICE system as follows: programs that make use of this kernel must ``load'' the kernel, normally during program initialization. The SPICE routine FURNSH loads a kernel file into the pool as shown below. CALL FURNSH ( 'frame_kernel_name; ) -- FORTRAN furnsh_c ( "frame_kernel_name" ); -- C cspice_furnsh, frame_kernel_name -- IDL cspice_furnsh( 'frame_kernel_name' ) -- MATLAB Once the file has been loaded, the SPICE routine GETFOV (getfov_c in C, cspice_getfov in IDL and MATLAB) can be used to retrieve FOV parameters for a given instrument or structure. This file was created and may be updated with a text editor or word processor. Naming Conventions ---------------------------------------------------------- All names referencing values in this IK file start with the characters `INS' followed by the NAIF JUNO spacecraft ID number (-61) followed by a NAIF three digit ID code for one of the JADE sensors. This is the full list of names and IDs for the JADE sensors described by this IK file: JUNO_JADE_E060 -61201 JUNO_JADE_E180 -61202 JUNO_JADE_E300 -61203 JUNO_JADE_I -61204 The remainder of the keyword name is an underscore character followed by the unique name of the data item. For example, the JADE/I boresight direction in the JUNO_JADE_I frame is specified by: INS-61204_BORESIGHT The upper bound on the length of the name of any data item 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. Instrument Description --------------------------------------------------------- From [5]: The Jovian Auroral Distributions Experiment (JADE) on Juno provides the critical in situ measurements of electrons and ions needed to understand the plasma energy particles and processes that fill the Jovian magnetosphere and ultimately produce its strong aurora. JADE is an instrument suite that includes three essentially identical electron sensors (JADE-Es), a single ion sensor (JADE-I), and a highly capable Electronics Box (EBox) that resides in the Juno Radiation Vault and provides all necessary control, low and high voltages, and computing support for the four sensors. The three JADE-Es are arrayed 120 degs apart around the Juno spacecraft to measure complete electron distributions from ~0.1 to 100 keV and provide detailed electron pitch-angle distributions at a 1 s cadence, independent of spacecraft spin phase. JADE-I measures ions from ~5 eV to ~50 keV over an instantaneous field of view of 270 degs x 90 degs in 4 s and makes observations over all directions in space each 30 s rotation of the Juno spacecraft. JADE-I also provides ion composition measurements from 1 to 50 amu with m/delta-m ~2.5, which is sufficient to separate the heavy and light ions, as well as O+ vs. S+, in the Jovian magnetosphere. All four sensors were extensively tested and calibrated in specialized facilities, ensuring excellent on-orbit observations at Jupiter. Mounting Alignment -------------------------------------------------------- Refer to the latest version of the Juno Frames Definition Kernel (FK) [3] for the JADE reference frame definitions and mounting alignment information. Sensor Layout --------------------------------------------------------- TBD. ES parameters from [4]: - 120 deg x 90 deg FOV - 7.5 deg x 3-6 deg (15 deg x 15 deg) pixels - 16 * 7.5 deg azimuthal pixels - ? * ? deg elevation pixels IS parameters from [4]: - 270 deg x 90 deg "goal" FOV - 10 deg x 20 deg "goal" pixels - 270 deg x +35/-45 deg actual FOV (per description) - 270 deg x +36.5/-44.5 deg actual FOV (per drawing) - 12 * 22.5 deg (?) azimuthal pixels - ? * ? deg elevation pixels JADE Electron Sensor FOVs ---------------------------------------------------------- The JADE Electron Sensor FOVs are defined as polygonal pyramids using ten boundary vectors to represent the +/-60 degree azimuth, +/-45 degree elevation FOVs shown in [4], using 30 degree azimuthal step. The boresight is along +X of the corresponding JUNO_JADE_E* frame. \begindata INS-61201_FOV_FRAME = 'JUNO_JADE_E060' INS-61201_FOV_SHAPE = 'POLYGON' INS-61201_BORESIGHT = ( 1.0, 0.0, 0.0 ) INS-61201_FOV_BOUNDARY_CORNERS = ( 0.35355339 -0.61237244 -0.70710678 0.61237244 -0.35355339 -0.70710678 0.70710678 0.00000000 -0.70710678 0.61237244 0.35355339 -0.70710678 0.35355339 0.61237244 -0.70710678 0.35355339 0.61237244 0.70710678 0.61237244 0.35355339 0.70710678 0.70710678 0.00000000 0.70710678 0.61237244 -0.35355339 0.70710678 0.35355339 -0.61237244 0.70710678 ) INS-61202_FOV_FRAME = 'JUNO_JADE_E180' INS-61202_FOV_SHAPE = 'POLYGON' INS-61202_BORESIGHT = ( 1.0, 0.0, 0.0 ) INS-61202_FOV_BOUNDARY_CORNERS = ( 0.35355339 -0.61237244 -0.70710678 0.61237244 -0.35355339 -0.70710678 0.70710678 0.00000000 -0.70710678 0.61237244 0.35355339 -0.70710678 0.35355339 0.61237244 -0.70710678 0.35355339 0.61237244 0.70710678 0.61237244 0.35355339 0.70710678 0.70710678 0.00000000 0.70710678 0.61237244 -0.35355339 0.70710678 0.35355339 -0.61237244 0.70710678 ) INS-61203_FOV_FRAME = 'JUNO_JADE_E300' INS-61203_FOV_SHAPE = 'POLYGON' INS-61203_BORESIGHT = ( 1.0, 0.0, 0.0 ) INS-61203_FOV_BOUNDARY_CORNERS = ( 0.35355339 -0.61237244 -0.70710678 0.61237244 -0.35355339 -0.70710678 0.70710678 0.00000000 -0.70710678 0.61237244 0.35355339 -0.70710678 0.35355339 0.61237244 -0.70710678 0.35355339 0.61237244 0.70710678 0.61237244 0.35355339 0.70710678 0.70710678 0.00000000 0.70710678 0.61237244 -0.35355339 0.70710678 0.35355339 -0.61237244 0.70710678 ) \begintext JADE Ion Sensor FOV ---------------------------------------------------------- The JADE Ion Sensor FOV is defined as a polygonal pyramid using twenty boundary vectors to represent the +135/-135 degree azimuth, 36.5/-44.5 degree elevation FOV shown in [4], using 30 degree azimuthal step. The boresight is along +X of the JUNO_JADE_I frame. \begindata INS-61204_FOV_FRAME = 'JUNO_JADE_I' INS-61204_FOV_SHAPE = 'POLYGON' INS-61204_BORESIGHT = ( 1.0, 0.0, 0.0 ) INS-61204_FOV_BOUNDARY_CORNERS = ( -0.50434423 -0.50434423 -0.70090926 -0.18460280 -0.68894703 -0.70090926 0.18460280 -0.68894703 -0.70090926 0.50434423 -0.50434423 -0.70090926 0.68894703 -0.18460280 -0.70090926 0.68894703 0.18460280 -0.70090926 0.50434423 0.50434423 -0.70090926 0.18460280 0.68894703 -0.70090926 -0.18460280 0.68894703 -0.70090926 -0.50434423 0.50434423 -0.70090926 -0.56841264 0.56841264 0.59482279 -0.20805347 0.77646610 0.59482279 0.20805347 0.77646610 0.59482279 0.56841264 0.56841264 0.59482279 0.77646610 0.20805347 0.59482279 0.77646610 -0.20805347 0.59482279 0.56841264 -0.56841264 0.59482279 0.20805347 -0.77646610 0.59482279 -0.20805347 -0.77646610 0.59482279 -0.56841264 -0.56841264 0.59482279 ) \begintext End of the IK file.