HESSI Science Objective

HESSI Non-Solar Science Objectives

HESSI Primary Observations

Complementary Observations

HESSI Firsts

Expected Numbers of Flares

HESSI Observational Characteristics

HESSI Summary

HESSI PI and Co-Is

HESSI Associated Scientists

HESSI Prime Responsibilities

GSFC Involvement

HESSI Imaging Parameters

Tecomet Grid #1

Tecomet Grid #1

HESSI Top Grid Tray

HESSI Rear Grid Tray

Germanium Detector

Sunpower M77 Stirling-Cycle Cooler

Instrument Sensitivity

Angular Coverage vs. Photon Energy

Relative Modulation Amplitude
vs. Photon Energy

Composite Flare Spectrum

Energy Resolution vs. Photon Energy

Count Rates in Each Detector for One Rotation

Principle of Twist Monitoring System - TMS

Prelaunch Twist Monitoring System (TMS)

Roll Angle System (RAS)