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The Galileo Energetic Particles Detector


Galileo EPD Handbook


Chapter 2. EPD Software


LGA Processing Software for the Energetic Particles Detector (continued)

Source: C. Brull and S. Stone, December 19, 1998


2. LGA Processor Inputs


2.1  LGA EPD Packets


The LGA packets are described in detail in Steve Jaskulek's document EPD SBAND Mission Software Requirements, Rev. H, dated February 22, 1996. Additional details regarding the LGA packet format are found in the JPL document GLL-3-280 Rev. D, Appendix D, section


**Known deficiency of this document: "Need to include a summary of the format of the LGA packets, including temporal and spatial resolution descriptions; description of channel maps; bit offsets of LGA packet data and data format." See other documents on this website.


2.2 SFDU for Galileo Project


The data packets are enclosed in a Standard Formated Data Unit. The main reference for this section is a compilation of three documents created by Betsy Wilson.


2.3 MAG Data


Magnetometer data is to be included in the LGA archive (section 3.1.7). Magnetic field information is supplied by the magnetometer team in the form of an ASCII file containing time and magnetic field components in spacecraft coordinates.




Position and orientation information of the Galileo spacecraft is included in the EPD header block (section 3.1) of the LGA archive file. The data will be obtained from AACS packets and SPICE kernels. Appendix B contains information on how the coordinate systems are defined.



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Updated 8/23/19, Cameron Crane


Manufacturer: The Galileo Spacecraft was manufactured by the Jet Propulsion Laboratory, Messerschmitt-Bölkow-Blohm, General Electric, and the Hughes Aircraft Company.

Mission Duration: Galileo was planned to have a mission duration of around 8 years, but was kept in operation for 13 years, 11 months, and 3 days, until it was destroyed in a controlled impact with Jupiter on September 21, 2003.

Destination: Galileo's destination was Jupiter and its moons, which it orbitted for 7 years, 9 months, and 13 days.