We present an overview of the operations, calibration, geodetic control, photometric standardization, and processing of images from the Mercury Dual Imaging System (MDIS) acquired during the orbital phase of the MESSENGER spacecraft’s mission at Mercury (18 March 2011–30 April 2015). We also provide a summary of all of the MDIS products that are available in NASA’s Planetary Data System (PDS). Updates to the radiometric calibration included slight modification of the frame-transfer smear correction, updates to the flat fields of some wide-angle camera (WAC) filters, a new model for the temperature dependence of narrow-angle camera (NAC) and WAC sensitivity, and an empirical correction for temporal changes in WAC responsivity. Further, efforts to characterize scattered light in the WAC system are described, along with a mosaic-dependent correction for scattered light that was derived for two regional mosaics. Updates to the geometric calibration focused on the focal lengths and distortions of the NAC and all WAC filters, NAC–WAC alignment, and calibration of the MDIS pivot angle and base. Additionally, two control networks were derived so that the majority of MDIS images can be co-registered with sub-pixel accuracy; the larger of the two control networks was also used to create a global digital elevation model. Finally, we describe the image processing and photometric standardization parameters used in the creation of the MDIS advanced products in the PDS, which include seven large-scale mosaics, numerous targeted local mosaics, and a set of digital elevation models ranging in scale from local to global.

中文翻译：

---

MESSENGER 的 Mercury 双成像系统的校准、投影和最终图像产品

我们概述了信使号航天器在水星执行任务的轨道阶段（2011 年 3 月 18 日至 2015 年 4 月 30 日）期间获得的水星双成像系统 (MDIS) 图像的操作、校准、大地控制、光度标准化和处理. 我们还提供了 NASA 行星数据系统 (PDS) 中可用的所有 MDIS 产品的摘要。对辐射校准的更新包括对帧转移涂抹校正的轻微修改、对某些广角相机 (WAC) 过滤器的平面场的更新、窄角相机 (NAC) 和 WAC 灵敏度的温度依赖性的新模型，以及对 WAC 响应度随时间变化的经验修正。此外，描述了表征 WAC 系统中散射光的努力，以及为两个区域马赛克导出的散射光的马赛克相关校正。几何校准的更新侧重于 NAC 和所有 WAC 滤波器的焦距和失真、NAC-WAC 对齐以及 MDIS 枢轴角和底座的校准。此外，派生了两个控制网络，以便大多数 MDIS 图像可以与亚像素精度共同配准；两个控制网络中较大的一个也用于创建全球数字高程模型。最后，我们描述了在 PDS 中创建 MDIS 高级产品时使用的图像处理和光度标准化参数，其中包括七个大型马赛克、许多有针对性的局部马赛克以及一组从局部到局部范围的数字高程模型。全球的。