UVS










    UVS Schematic drawing and photographs of the UVS instrument.



















    UVS


















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    Introduction

    Instrument Description
    UVS is an ultraviolet imaging spectrograph sensitive to both extreme and far-ultraviolet emissions in the 70-205 nm range that are used to characterize the morphology and spectral nature of Jupiter’s auroral emissions as they are targeted during the Juno mission. Similar instruments have flown on the Rosetta mission to comet 67 P/Churyumov-Gerasimenko, the New Horizons mission to Pluto and the Kuiper Belt; and the Lunar Reconnaissance Orbiter (LRO); and are planned for the JUICE and Europa Clipper future missions to the Jupiter system. See Gladstone, G.R. et al., (2017) The Ultraviolet Spectrograph on NASA’s Juno Mission, Space Sci Rev (2017) 213:447 – 473, DOI 10.1007/s11214-014-0040-z.


    Measurement Objectives
    Juno-UVS's main objective is to provide context for the particles and fields instruments (i.e., JADE, JEDI, Waves, and MAG). By observing expected locations of the Juno magnetic field line footprint, direct comparison of the precipitating particle fluxes measured by JADE and JEDI can be made with the FUV emissions they produce upon impacting Jupiter’s upper atmosphere (composed mainly of the Lyman series of H and the Lyman, Werner, and Rydberg band systems of H2).


    Cruise and Earth Flyby Data and Jupiter Data with both PDS3 and PDS4 labels are available through perijove 18    (Note: data were not acquired during Jupiter Insertion on July 5, 2016 (perijove 0). Also only gravity data were obtained during perijove 2.)


    Useful Mission Documents

    Jupiter Data

    The calibrated data files contain a collection of the far-ultraviolet photon detections of the Juno Ultraviolet Spectrograph (UVS). The fundamental derived parameters contained in a calibrated data file are a collection of the absolute time tags for each of the detected far-ultraviolet photons, the weight factor applied to each event to account for instrumental effects, the radiometric and wavelength calibrations and the geometric locations. The reduced data records are in FITS format and contain the calibrated photon list (Extension 2) and supporting and related data as follows
    1. Calibrated Spectral Image: A 'quick-look' check on data quality. [Extension 0 = primary FITS header and data unit(HDU)]
    2. Acquisition List: [Extension 1]
    3. Calibrated Photon List [Extension 2] Contains events and related attributes
    4. Ancillary Data: [Extension 3] Contains additional data useful for mapping the observed emissions
    5. Calibrated Analog Count Rate [Extension 4]
    6. Calibrated Digital Count Rate: [Extension 5]
    7. Housekeeping Data: [Extension 6]
    8. Wavelength Lookup Image: [Extension 7]
    9. Mask Information: [Extension 8]


    Need a fits reader

    Calibrated Data - Directory containing the RDR data files
    Data Set Description (pdf)
    Software Interface Specification Document (SIS) Instrument and data structures description
    Documents - Directory containing the Document Collection.
    Data Files


    Selecting Data
    A basic data unit for this migrated data consists of a FITS file that contains reduced data and supporting files and the corresponding PDS3 and PDS4 labels. Utilizing the appropriate Mission Timeline and Geometry Files will allow you to enter start and stop times or corresponding URNs to retrieve the desired data.

    The tables of physical parameters for perijove and north and south pole passage can be used to isolate particular perijove passages, while geometry files for a selected passage can be used to isolate time intervals that correspond to desired data.

    The geometry files generally span a period of +/- 5 hours of perijove and list various physical parameters at 10-minute intervals. The parameters include, e.g., the apparent angular size of Jupiter, planetocentric and planetographic sub-spacecraft and sub-solar longitudes and latitudes, spacecraft radial distance from Jupiter, observer distance and phase angle.

    Physical Parameters for Juno's Perijove and Near Equator Crossing and Reference to the Red Spot (csv)
    Physical Parameters for Juno's North and South Pole Passages (csv)
    Physical Parameters for Juno's Apojove and Far Equatorial Crossings (csv)

    Main Index (csv) This file summarizes the contents of the calibrated data archive. It lists URN, start and stop times and the file size. Times of perijove are tagged.

    Geometry files - Each table contains geometry data for a time interval of +/-5 hours of perijove in 10 minute intervals. These were generated using WebGeocalc

    Selecting data at the file level

    Raw Data - Directory containing the EDR data files
    Software Interface Specification Document (SIS) - Instrument and data structures description
    Data Set Description
    Documents - Directory containing the Document Collection.
    Data Files
    Index (csv)

    Selecting Data - Use Index to determine start and stop times or to generate a list of URNs

    Cruise and Earth Flyby Data an Approach Data

    Calibrated Data - Directory containing the RDR data files
    Software Interface Specification Document (SIS) - Instrument and data structures description
    Data Set Description (pdf)
    Documents - Directory containing the Document Collection.
    Data Files
    Index (csv)

    Selecting Data - Use Index to determine start and stop times or to generate a list of URNs

    Raw Data - Directory containing the EDR data files
    Software Interface Specification Document (SIS) - Instrument and data structures description
    Data Set Description
    Documents - Directory containing the Document Collection.
    Data Files
    Index (csv)

    Selecting Data - Use Index to determine start and stop times or to generate a list of URNs

    Citing Data Sets for Publications
    Calibrated
    CITATION_DESC = Trantham, B, JUNO J UVS REDUCED DATA RECORD V1.0, JNO-J-UVS-3-RDR-V1.0, NASA Planetary Data System, 2014
    Raw
    CITATION_DESC = Trantham, B, JUNO J UVS EXPERIMENT DATA RECORD V1.0, JNO-J-UVS-2-EDR-V1.0, NASA Planetary Data System, 2014.

    Bibliography - A listing of team members to facilitate literature searches

    SPICE - Archived Juno SPICE ancillary data providing observation geometry (positions, orientations, instrument pointing, time conversions, etc.) are available from the PDS NAIF Node.