کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1773309 1021126 2013 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stardust–NExT NAVCAM calibration and performance
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم فضا و نجوم
پیش نمایش صفحه اول مقاله
Stardust–NExT NAVCAM calibration and performance
چکیده انگلیسی

NASA’s Stardust–NExT mission used the Stardust spacecraft to deliver a scientific payload, including a panchromatic visible camera designated NAVCAM, to a close flyby of Comet 9P/Tempel 1 in February 2011. Proper interpretation of the NAVCAM images depends on accurate calibration of the camera performance. While the NAVCAM had been calibrated during the primary Stardust mission to Comet 81P/Wild 2 in 2004, that calibration was incomplete and somewhat lacking in fidelity. Substantial improvements in the NAVCAM calibration were achieved during Stardust–NExT in the areas of geometric correction, spatial resolution, and radiometric calibration (in particular, zero-exposure signal levels, shutter time offsets, absolute radiometric response, noise, and scattered light characterization). These improvements will allow upgrades to the calibration of images returned from the Stardust primary mission as well as high-quality calibration of the Stardust–NExT images. The upgraded calibration results have been incorporated into the Stardust–NExT image processing pipeline via new routines and updated constants and files in preparation for archiving calibrated images in the NASA Planetary Data System.


► Significant improvements in the inflight calibration of the Stardust NAVCAM.
► Point spread function determined to 10−6 of total point-source signal.
► Models of bias/dark current created for when overclocked pixels are not returned.
► Absolute radiometric calibration conversion constants derived.
► Upgraded data processing pipeline is described.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Icarus - Volume 222, Issue 2, February 2013, Pages 436–452
نویسندگان
, , , , , ,