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http://hdl.handle.net/20.500.12386/32853
Title: | Marsis on-board software requirements for upgrade | Authors: | CICCHETTI, ANDREA NENNA , CARLO CARTACCI, MARCO NOSCHESE, RAFFAELLA |
Issue Date: | 2023 | Series: | INAF Technical Reports - Rapporti Tecnici INAF | Report: | 222 | Abstract: | The Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) is an instrument for subsurface remote sensing of the Mars planet. Since its debut, many successful observations have been carried out. At this point of this fruitful mission, having acquired a good knowledge of the Mars environment, it is now necessary to improve the instrument science performances, mitigating some limitations of the on-board SW, that were required at the beginning of the mission, but which were proven to be excessive and above all limiting. The main purpose of this document is to define the requirements necessary to update the on-board SW, in order to add two new improved operative modes to the ones already in use. It is worth noting that, the existing operative modes will remain unchanged and can continue to be used after loading the updated SW. The first new operative mode (SSM) is related to the observation of Mars. It will be similar to the existing main dual channel sub surface mode (SS3). The processing for the first operative channel will remain unchanged, while calculations on the second channel will be modified to extract the most significant data from the full raw data set, discarding what is meaningless or providing poor scientific contribution. The new second operative mode (SSP), will be designed to optimize above all the observation of Phobos, which was not originally thought as a target for MARSIS, this means that a very complex on-board SW configuration is required, in order to force the radar to work properly even in this situation. Moreover, actual Phobos observation makes use of valuable SC resources for storing high quantity of useless data, that cannot be eliminated without modifications of MARSIS SW. The new operative mode will take care of removing these unnecessary data. It will also optimize adaptively the Receiver Gain during the flyby, thereby improving the dynamic range of the receiver of the recorded Science Data. At the same time data-rate on the SC OBDH bus will be strongly reduced, allowing the possibility for MARSIS, PFS and SPICAM to operate simultaneously. | URI: | http://hdl.handle.net/20.500.12386/32853 https://doi.org/10.20371/INAF/TechRep/222 |
Fulltext: | open |
Appears in Collections: | 4.01 Rapporti tecnici INAF |
Files in This Item:
File | Description | Size | Format | |
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MARSIS_ON_BOARD_SW_UPGRATE_ISSUE_1_REV_0.pdf | Report | 3.33 MB | Adobe PDF | View/Open |
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