4. Electron Electrostatic Analyzer (EEA) Calibration Plan

4.1. Overall Calibration Scheme

This section summarizes the calibration philosophy and identifies any heritage tied to the calibration schemes of related missions and instruments.

4.2. Pre-flight Calibration Plans

This section details how unit level (e.g., individual detectors) and system level (e.g., instrument subsystem) are tested and calibrated to verify that they will meet the expected performance parameters prior to placement (i.e., launch) into the relevant operational environment.

4.2.1. <Subsystem name> Pre-flight Calibrations

This subsection describes the specific testing and examination methods used to characterize the build and performance of each subsystem or component (e.g., diffraction gratings, CCDs)

4.3. Instrument Description

This subsection describes the primary scientific objectives of the instrument, its hardware, physical configuration, etc. This subsection lists the major elements of the instrument and provides a schematic of the conceptual design. Known issues due to external factors that could impact any long-term comparison or analysis (e.g., optical distortion due to gradual radiation degradation) should be captured.

4.4. In-flight Tracking of Short-Term Changes

This section identifies any potential factors in the operational environment (e.g., radiation, temperature fluctuations, exposure-related degradation) that could eventually result in off- nominal changes in the instrument’s measurements. The methods used to identify and track these changes are also described.

4.5. Long-term Absolute Calibration Tracking (Re-Calibration)

This section identifies any periodic re-calibration to absolute standards to be used over the course of the mission.

4.6. Validation

This describes the use of any other measurements (via complementary instruments) or models to validate the instrument’s measurements