User:Seddon/Heliophysics Environmental and Radiation Measurement Experiment Suite

The Heliophysics Environmental and Radiation Measurement Experiment Suite will explore Earth's interaction with the solar wind and the behaviour of the magnetotail. The experiment suite will allow the collection of data in coordination with the THEMIS/ARTEMIS spacecraft creating a heliophysics lunar constellation.

Science
HERMES aims to build a better understanding on the causes of space-weather variability as driven by the Sun and modulated by the magnetosphere and has three science goals:


 * Determine mechanisms of solar wind mass and energy transport


 * Characterize energy, topology, and ion composition in the deep magnetotail.


 * Establish observational capabilities of an on-board pathfinder payload measuring local space weather to support deep-space and long-term human exploration.

Instruments
The suite will consist of four instruments:


 * Fluxgate and Magneto-Inductive Magnetometers to measure Magnetic Field Vector. Built and supplied by Goddard Space Flight Center. Principal investigators from University of Michigan and Goddard Space Flight Center.
 * Miniaturized Electron pRoton Telescope (MERiT) to measure ion flux of energies between 1-190 MeV and electron flux of energies between 0.3 - 9 MeV. Built, supplied and operated by Goddard Space Flight Center.
 * Electron Electrostatic Analyser (EEA) which is an electron spectrometer, to measure flux, density, speed and temperature of lower energy electrons of less that 30 KeV - Built, supplied and operated by Goddard Space Flight Center.
 * Solar Prove Analyser (SPAN-I) which is an ion spectrometer. Measures flux, density, speed, temperature and type of low energy ions with energies less than 40KeV. SPAN-I will be supplied and operated by University of California, Berkeley.

Development
Instrument Concept Reviews: Summer 2020

Single Design Review: November 2020

KDP C: NET March 2021

Payload Delivery: July 2023