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The ARCSTONE instrument is designed as a push-broom imaging spectrometer for Earth that will enable on-orbit SI-traceable observations with radiometric precision less than one percent [156]. ARCSTONE utilizes agile maneuvers of the satellite to support broad phase angle lunar irradiance characterization. It is planned to fly in 2024 on the ELC-1 Site 3 nadir position, enabling 2D pointing capability of the roll and pitch gimbal axes. Observations can be made with slit scanning or cross-slit scanning modes.

ARCSTONE and MOON168 Observations
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