A local Martian crustal field model: Targeting the candidate landing site of the 2020 Chinese Mars Rover

Images from two sensors, the High-Resolution Imaging Science Experiment (HiRISE) and the Context Camera (CTX), both on-board the Mars Reconnaissance Orbiter (MRO), were used to generate high-quality DEMs (Digital Elevation Models) of the Martian surface. However, there were discrepancies between the DEMs generated from the images acquired by these two sensors due to various reasons, such as variations in boresight alignment between the two sensors during the flight in the complex environment. This paper presents a systematic investigation of the discrepancies between the DEMs generated from the HiRISE and CTX images. A combined adjustment algorithm is presented for the co-registration of HiRISE and CTX DEMs. Experimental analysis was carried out using the HiRISE and CTX images collected at the Mars Rover landing site and several other typical regions. The results indicated that there were systematic offsets between the HiRISE and CTX DEMs in the longitude and latitude directions. However, the offset in the altitude was less obvious. After combined adjustment, the offsets were eliminated and the HiRISE and CTX DEMs were co-registered to each other. The presented research is of significance for the synergistic use of HiRISE and CTX images for precision Mars topographic mapping.

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NASA picks Mars rover landing site

The New Scientist ◽

10.1016/s0262-4079(18)32148-1 ◽

2018 ◽

Vol 240 (3205) ◽

pp. 6

Keyword(s):

Landing Site ◽

Mars Rover

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The science process for selecting the landing site for the 2020 Mars rover

Planetary and Space Science ◽

10.1016/j.pss.2018.07.001 ◽

2018 ◽

Vol 164 ◽

pp. 106-126 ◽

Cited By ~ 13

Author(s):

John A. Grant ◽

Matthew P. Golombek ◽

Sharon A. Wilson ◽

Kenneth A. Farley ◽

Ken H. Williford ◽

...

Keyword(s):

Landing Site ◽

Mars Rover

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THE SCIENCE PROCESS FOR SELECTING THE LANDING SITE FOR THE 2020 MARS ROVER

10.1130/abs/2018am-318930 ◽

2018 ◽

Author(s):

John A. Grant ◽

◽

M.P. Golombek ◽

Sharon A. Wilson ◽

Kenneth A. Farley ◽

...

Keyword(s):

Landing Site ◽

Mars Rover

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COMPARISON AND CO-REGISTRATION OF DEMS GENERATED FROM HiRISE AND CTX IMAGES

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprsarchives-xli-b4-511-2016 ◽

2016 ◽

Vol XLI-B4 ◽

pp. 511-517

Author(s):

Yiran Wang ◽

Bo Wu

Keyword(s):

Landing Site ◽

Systematic Investigation ◽

Topographic Mapping ◽

High Resolution Imaging ◽

Complex Environment ◽

Martian Surface ◽

Mars Rover ◽

Digital Elevation ◽

Imaging Science ◽

Resolution Imaging

Images from two sensors, the High-Resolution Imaging Science Experiment (HiRISE) and the Context Camera (CTX), both on-board the Mars Reconnaissance Orbiter (MRO), were used to generate high-quality DEMs (Digital Elevation Models) of the Martian surface. However, there were discrepancies between the DEMs generated from the images acquired by these two sensors due to various reasons, such as variations in boresight alignment between the two sensors during the flight in the complex environment. This paper presents a systematic investigation of the discrepancies between the DEMs generated from the HiRISE and CTX images. A combined adjustment algorithm is presented for the co-registration of HiRISE and CTX DEMs. Experimental analysis was carried out using the HiRISE and CTX images collected at the Mars Rover landing site and several other typical regions. The results indicated that there were systematic offsets between the HiRISE and CTX DEMs in the longitude and latitude directions. However, the offset in the altitude was less obvious. After combined adjustment, the offsets were eliminated and the HiRISE and CTX DEMs were co-registered to each other. The presented research is of significance for the synergistic use of HiRISE and CTX images for precision Mars topographic mapping.

Download Full-text