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JUNO J ENERGETIC PARTICLE DETECTOR UNCALIBRATED V1.0 (PDS)

NSSDCA ID: PSFP-00736

Availability: Archived at NSSDC, accessible from elsewhere

Description

This description was generated automatically using input from the Planetary Data System.

Data Set Overview

The data set consists of uncalibrated observations, also known as EDRs. For all the EDR products there is a detached PDS label file that describes the contents of one data file. Each label file will have the same base name as the data file it is describing, with the extension .LBL to denote a label file. The label file defines the start time and end of the observation, product creation time, and the structure of the ASSCI tables. Each data product is identified within the PDS label by a STANDARD_DATA_PRODUCT_ID value, shown in parentheses in the table below.

Instrument Overview

The JEDI sensors consists of a 60-mm diameter, hockey puck-like cylinder, in which a start foil and stop foil, wrapped around opposite curved sides of the cylinder, constitute the TOF chamber. The detectors are arranged so that each detector senses the events within a given range of incidence angles. Each of the 6 detector modules is composed of 4 pixels: large and small ion and large and small electron. See the INSTRUMENT.CAT file for more information.

Calibration Overview

This data set is NOT calibrated; it only provides the uncalibrated sensor measurements.

Parameters

The setting and interaction of the actual instrument parameters used to configure the timing and modes of the collection of spectral data during normal science operations are complex and a detailed understanding of them is not required outside of science operations team. We present science parameters that describe the data collection settings in a useable fashion: UTC - a human readable timestamp provided for ease of use. The ET timestamps are preferred for actual analysis. ETStart, ETLookDirection, ETEnd - Time stamps in Solar System Barycentric time (TDB, Epoch J2000) corresponding to the beginning, middle (roughly), and end of the data accumulation. See JEDI SIS for a detailed description of the ETLookDirection parameter, which is the recommended SCET time to use for data analysis. Duration - Total live exposure time SectorDeadTime - instrument dead time due to latency in switching between collection modes. LargePixel - wether the large or small detector pixel is in use. SCLKStart, SCLKLookDirection, SCLKEnd - spacecraft clock strings corresponding to the same three times as the ET parameters. Quality - a multi-bit flag indicating data quality issues. 0 means no adverse conditions PacketTimeTag, Spin, Sector - retained for instrument science team usage in data validation

Data

The JUNO JEDI EDR data set products are described as follows: HIERSESP High-Res (E) Electron Spectra LOERSESP Low-Res (E) Electron Spectra Electron spectra as measured by the solid state detector system (SSD) The High-Res product has more energy channels but is collected at a longer cadence than the Low-Res product. HIERSISP High-Res (E) Ion Spectra LOERSISP Low-Res (E) Ion Spectra Ion spectra as measured by the solid state detector system (SSD) The High-Res product has more energy channels but is collected at a longer cadence than the Low-Res product. HIERSTOFXER High-Res (E) Time Of Flight (TOF) x Energy Ion Rates LOERSTOFXER Low-Res (E) TOF x Energy Ion Rates NONPTOFXER Non-proton TOF x Energy Rates Ion spectra as measured by the SSD and the TOF systems working in concert. The High and Low Res products are defined as above and contain data for energetic charged protons. The NONP data contain data for other ion species. HIERSTOFXPHR High-Res (E) TOF x Pulse Height Ion Rates LOERSTOFXPHR Low-Res (E) TOF x Pulse Height Ion Rates NONPTOFXPHR Non-proton TOF x Pulse Height Rates Ion spectra as measured by the TOF system using the pulse height of the TOF signal to measure energy (this allows us to measure lower particle energies). The High and Low Res products are defined as above and contain data for energetic charged protons. The NONP data contain data for other ion species.

These data are available on-line from the Planetary Data System (PDS) at:

https://pds-ppi.igpp.ucla.edu/data/JNO-J-JED-2-EDR-V1.0/

Alternate Names

  • JNO-J-JED-2-EDR-V1.0

Discipline

  • Planetary Science: Fields and Particles

Additional Information

Spacecraft

Experiments

Questions and comments about this data collection can be directed to: Dr. David R. Williams

 

Personnel

NameRoleOriginal AffiliationE-mail
Dr. Barry H. MaukData ProviderApplied Physics Laboratory
Dr. Barry H. MaukGeneral ContactApplied Physics Laboratory
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