The OSIRIS-REx Visible and InfraRed Spectrometer (OVIRS) operates over the ∼0.4- to 4.3-μm wavelength range. Radiometric calibration over this broad range requires the use of multiple calibration sources. Initial OVIRS in-flight calibration coefficients were previously computed using ground calibration from visible integrating sphere and IR blackbody sources, cross-calibrated with Earth-observing satellites for visible wavelengths, and adjusted using the spectrum of the OSIRIS-REx mission’s target body, asteroid (101955) Bennu. As part of the final in-flight calibration, we determined that the best calibration method removes out-of-band IR signal leakage prior to radiometric calibration and updated the calibration coefficients accordingly. These final calibration coefficients work well for data where the field of view is filled, and we document the possible artifacts in underfilled spots.

中文翻译：

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最终OSIRIS-REx OVIRS空中辐射定标的推导

OSIRIS-REx可见光和红外光谱仪（OVIRS）在约0.4至4.3μm的波长范围内运行。在如此宽泛的范围内进行辐射校准需要使用多个校准源。最初的OVIRS飞行中校准系数是使用可见积分球和红外黑体源的地面校准预先计算出来的，然后通过对地观测卫星对可见波长进行交叉校准，然后使用OSIRIS-REx任务目标小行星的光谱进行调整（ 101955）Bennu。作为最终飞行中校准的一部分，我们确定最好的校准方法可以消除辐射校准之前的带外IR信号泄漏，并相应地更新校准系数。这些最终的校准系数非常适合填充视野的数据，