scholarly journals HIGH PRECISION DTM AND DOM GENERATING USING MULTI-SOURCE ORBITAL DATA ON CHANG’E-4 LANDING SITE

2019 ◽  
Vol XLII-2/W13 ◽  
pp. 1413-1417 ◽  
Author(s):  
B. Liu ◽  
S. Niu ◽  
X. Xin ◽  
M. Jia ◽  
K. Di ◽  
...  
Keyword(s):  
High Precision ◽  
Digital Terrain Model ◽  
Landing Site ◽  
Ground Sample ◽  
Terrain Model ◽  
Von Karman ◽  
Site Mapping ◽  
Before And After ◽  
Digital Orthophoto ◽  
Von Kármán

<p><strong>Abstract.</strong> Chang’e-4 (CE-4) has successfully soft landed in Von Kármán crater inside the South Pole-Aitken (SPA) basin at 10:26 am on January 3, 2019. High precision landing site mapping plays an essential role in mission operations and science applications before and after landing. In this paper, we propose a novel method for generating the highest resolution and the best precision Digital Terrain Model (DTM) and Digital Orthophoto Map (DOM) of the CE-4 landing area using available multi-source data. First, the CE-2 DTM is co-registered to SLDEM2015. Then the vertical inconsistencies of the co-registered DTMs are analysed and the biases of CE-2 DTM with respect to SLDEM2015 are erased. Finally, a new DTM with more information and better precision is generated by fusion of the co-registered DTMs. Using the new DTM as a reference, a seamless DOM is generated based on block adjustment of projected imagery, which can reduce the inconsistencies among the corrected images to sub-pixel level. As a result, a DTM of the Von Kármán crater area ( 42º&amp;thinsp;S&amp;ndash;48°&amp;thinsp;S/172º&amp;thinsp;E&amp;ndash;180°&amp;thinsp;E) and a seamless DOM covering an area of 2.3° in longitude and 1° in latitude with a ground sample distance of 0.9&amp;thinsp;m are generated using the developed method.</p>

scholarly journals EVALUATING STEREO DTM QUALITY AT JEZERO CRATER, MARS WITH HRSC, CTX, AND HIRISE IMAGES

2020 ◽  
Vol XLIII-B3-2020 ◽  
pp. 1129-1136
Author(s):  
R. L. Kirk ◽  
R. L. Fergason ◽  
B. Redding ◽  
D. Galuszka ◽  
E. Smith ◽  
...  
Keyword(s):  
High Resolution ◽  
Digital Terrain Model ◽  
Landing Site ◽  
Horizontal Resolution ◽  
Ground Sample ◽  
Gale Crater ◽  
Terrain Model ◽  
Digital Terrain ◽  
Spatial Registration ◽  
Imaging Science

Abstract. We have used a high-precision, high-resolution digital terrain model (DTM) of the NASA Mars 2020 rover Perseverance landing site in Jezero crater based on mosaicked images from the Mars Reconnaissance Orbiter High Resolution Imaging Science Experiment (MRO HiRISE) camera as a reference dataset to evaluate DTMs based on Mars Express High Resolution Stereo Camera (MEX HRSC) and MRO Context camera (CTX) images. Results are consistent with our earlier HRSC-HiRISE comparisons at the Mars Science Laboratory (MSL) Curiosity landing site in Gale crater, confirming that those results were not compromised by the small area compared and potential problems with spatial registration. Specifically, height errors are on the order of half a pixel and correspond to an image matching error of 0.2–0.3 pixel but estimates of horizontal resolution are 10–20 pixels. Products from the HRSC team pipeline at DLR are smoother but more precise vertically than those produced by using the commercial stereo package SOCET SET®. The DLR products are also homogenous in quality, whereas the SOCET products are less smoothed and have higher errors in rougher terrain. Despite this weak variation, our results are consistent with a rule of thumb of 0.2–0.3 pixel matching precision based on many prior studies. Horizontal resolution is significantly coarser than the DTM ground sample distance (GSD), which is typically 3–5 pixels.

scholarly journals Ultra-High-Resolution 1 m/pixel CaSSIS DTM Using Super-Resolution Restoration and Shape-from-Shading: Demonstration over Oxia Planum on Mars

2021 ◽  
Vol 13 (11) ◽  
pp. 2185
Author(s):  
Yu Tao ◽  
Sylvain Douté ◽  
Jan-Peter Muller ◽  
Susan J. Conway ◽  
Nicolas Thomas ◽  
...  
Keyword(s):  
High Resolution ◽  
3D Reconstruction ◽  
Imaging System ◽  
Processing System ◽  
Digital Terrain Model ◽  
Super Resolution ◽  
Landing Site ◽  
Shape From Shading ◽  
Stereo Pair ◽  
Terrain Model

We introduce a novel ultra-high-resolution Digital Terrain Model (DTM) processing system using a combination of photogrammetric 3D reconstruction, image co-registration, image super-resolution restoration, shape-from-shading DTM refinement, and 3D co-alignment methods. Technical details of the method are described, and results are demonstrated using a 4 m/pixel Trace Gas Orbiter Colour and Stereo Surface Imaging System (CaSSIS) panchromatic image and an overlapping 6 m/pixel Mars Reconnaissance Orbiter Context Camera (CTX) stereo pair to produce a 1 m/pixel CaSSIS Super-Resolution Restoration (SRR) DTM for different areas over Oxia Planum on Mars—the future ESA ExoMars 2022 Rosalind Franklin rover’s landing site. Quantitative assessments are made using profile measurements and the counting of resolvable craters, in comparison with the publicly available 1 m/pixel High-Resolution Imaging Experiment (HiRISE) DTM. These assessments demonstrate that the final resultant 1 m/pixel CaSSIS DTM from the proposed processing system has achieved comparable and sometimes more detailed 3D reconstruction compared to the overlapping HiRISE DTM.

scholarly journals Digital terrain model reconstruction and preliminary scientific exploration planning of the Chang'E 3

2014 ◽  
Vol XL-4 ◽  
pp. 149-151
Author(s):  
J. Liu ◽  
X. Ren ◽  
L. Mu ◽  
F. Wang ◽  
W. Wang ◽  
...  
Keyword(s):  
Digital Terrain Model ◽  
Landing Site ◽  
Model Reconstruction ◽  
Terrain Model ◽  
Topographic Features ◽  
Digital Terrain ◽  
Scientific Exploration ◽  
Terrain Models ◽  
Image Pairs ◽  
Yutu Rover

At 13:11 (GMT) December 14, 2013 Chang’e 3 (CE-3) successfully landed at 19.51° W, 44.12° N northwestern Mare Imbrium on the Moon, making it China's first planetary mission to land on a celestial body other than Earth. CE-3 explore comprises a lander and a rover. It carries eight scientific instruments onboard, including the descent camera on the lander, and the panoramic camera on the rover. These cameras imaged the topographic features around the landing site. This paper mainly presents the digital terrain model reconstruction techniques for the panoramic camera. Image pairs obtained during the first lunar day are used to reconstructed 3D Digital Terrain Models of 0.02 m resolution near observation points E and S3. The maps have been extensively used to support Yutu operations and strategic planning of the mission. The preliminary scientific exploration planning of the Yutu rover for the second lunar day has been made.

scholarly journals Assessment of the Role of Snowmelt in a Flood Event in a Gauged Catchment

Water ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 506 ◽  
Author(s):  
Jesús Mateo-Lázaro ◽  
Jorge Castillo-Mateo ◽  
José Sánchez-Navarro ◽  
Víctor Fuertes-Rodríguez ◽  
Alejandro García-Gil ◽  
...  
Keyword(s):  
Hydrological Cycle ◽  
Digital Terrain Model ◽  
Terrain Model ◽  
Rain Gauges ◽  
Digital Terrain ◽  
Before And After ◽  
Thawing Process ◽  
Rainfall Model

An actual event that happened in the Roncal valley (Spain) is investigated and the results are compared between models with and without snowmelt. A distributed rainfall model is generated with the specific data recorded by the rain gauges of the catchment during the episode. To describe the process of water routing in the hydrological cycle of the basin, a model is used based on combinations of parallel linear reservoirs (PLR model), distribution by the basin, and tip-out into its drainage network configured using a digital terrain model (DTM). This PLR model allows simulation of the different actual reservoirs of the basin, including the snow and the contribution due to its melting which, in the model, depends on the temperature. The PLR model also allows for a water budget of the episode where, in addition to the effective rainfall contribution, the water that comes from the thaw is taken into account. The PLR model also allows determination of the amount of water that exists in the basin before and after the episode, data of great interest. When comparing the simulations with and without taking into account the thawing process, it is evident that the intervention of the snow reservoir has been decisive in causing a flood to occur.

Composition, mineralogy and chronology of mare basalts and non-mare materials in Von Kármán crater: Landing site of the Chang’E−4 mission

2019 ◽  
Vol 179 ◽  
pp. 104741 ◽  
Author(s):  
Zongcheng Ling ◽  
Le Qiao ◽  
Changqing Liu ◽  
Haijun Cao ◽  
Xiangyu Bi ◽  
...  
Keyword(s):  
Landing Site ◽  
Von Karman ◽  
Von Kármán ◽  
Mare Basalts

scholarly journals Estimating Pasture Biomass and Canopy Height in Brazilian Savanna Using UAV Photogrammetry

2019 ◽  
Vol 11 (20) ◽  
pp. 2447 ◽  
Author(s):  
Juliana Batistoti ◽  
José Marcato Junior ◽  
Luís Ítavo ◽  
Edson Matsubara ◽  
Eva Gomes ◽  
...  
Keyword(s):  
Digital Terrain Model ◽  
Technical Note ◽  
Canopy Height ◽  
Brazilian Savanna ◽  
Surface Model ◽  
Panicum Maximum ◽  
Ground Sample ◽  
Terrain Model ◽  
Sampling Height ◽  
The Difference

The Brazilian territory contains approximately 160 million hectares of pastures, and it is necessary to develop techniques to automate their management and increase their production. This technical note has two objectives: First, to estimate the canopy height using unmanned aerial vehicle (UAV) photogrammetry; second, to propose an equation for the estimation of biomass of Brazilian savanna (Cerrado) pastures based on UAV canopy height. Four experimental units of Panicum maximum cv. BRS Tamani were evaluated. Herbage mass sampling, height measurements, and UAV image collection were simultaneously performed. The UAVs were flown at a height of 50 m, and images were generated with a mean ground sample distance (GSD) of approximately 1.55 cm. The forage canopy height estimated by UAVs was calculated as the difference between the digital surface model (DSM) and the digital terrain model (DTM). The R2 between ruler height and UAV height was 0.80; between biomass (kg ha−1 GB—green biomass) and ruler height, 0.81; and between biomass (kg ha−1 GB) and UAV height, 0.74. UAV photogrammetry proved to be a potential technique to estimate height and biomass in Brazilian Panicum maximum cv. BRS Tamani pastures located in the endangered Brazilian savanna (Cerrado) biome.

The Making of Digital Orthophoto Map Based on INPHO

2011 ◽  
Vol 90-93 ◽  
pp. 2818-2821
Author(s):  
Dong Ling Ma ◽  
Jian Cui ◽  
Ning Ding
Keyword(s):  
Production Efficiency ◽  
Digital Terrain Model ◽  
Model Matching ◽  
Terrain Model ◽  
Digital Terrain ◽  
Production Practice ◽  
Mode Of Operation ◽  
Speed Up ◽  
Digital Orthophoto

INPHO is foreign professional digital photogrammetry software, including aerial triangulation encryption, digital terrain model matching, the digital orthophoto rectification and image mosaic series modules. This paper, taking DMC image as a case study, according to production practice, states the method of making Digital Orthophoto Map (DOM) using all relevant modules of INPHO, and further points out several notes in the process of making DOM. Practice shows that making DOM using INPHO series software and paying attention to the mentioned precautions can speed up production rate, improve production efficiency, while its mode of operation is also greatly simplified compared with the normal mode of operation. It is a good way of making DOM.

scholarly journals Geological Characteristics of Von Kármán Crater, Northwestern South Pole-Aitken Basin: Chang'E-4 Landing Site Region

2018 ◽  
Vol 123 (7) ◽  
pp. 1684-1700 ◽  
Author(s):  
Jun Huang ◽  
Zhiyong Xiao ◽  
Jessica Flahaut ◽  
Mélissa Martinot ◽  
James Head ◽  
...  
Keyword(s):  
Landing Site ◽  
South Pole ◽  
Geological Characteristics ◽  
Von Karman ◽  
Von Kármán

scholarly journals Large Area Forest Yield Estimation with Pushbroom Digital Aerial Photogrammetry

Forests ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 397 ◽  
Author(s):  
Jacob Strunk ◽  
Petteri Packalen ◽  
Peter Gould ◽  
Demetrios Gatziolis ◽  
Caleb Maki ◽  
...  
Keyword(s):  
High Precision ◽  
Low Cost ◽  
Digital Terrain Model ◽  
Performance Estimation ◽  
Large Area ◽  
Terrain Model ◽  
Federal Organizations ◽  
Governmental Organizations ◽  
Aerial Photogrammetry ◽  
Non Governmental Organizations

Low-cost methods to measure forest structure are needed to consistently and repeatedly inventory forest conditions over large areas. In this study we investigate low-cost pushbroom Digital Aerial Photography (DAP) to aid in the estimation of forest volume over large areas in Washington State (USA). We also examine the effects of plot location precision (low versus high) and Digital Terrain Model (DTM) resolution (1 m versus 10 m) on estimation performance. Estimation with DAP and post-stratification with high-precision plot locations and a 1 m DTM was 4 times as efficient (precision per number of plots) as estimation without remote sensing and 3 times as efficient when using low-precision plot locations and a 10 m DTM. These findings can contribute significantly to efforts to consistently estimate and map forest yield across entire states (or equivalent) or even nations. The broad-scale, high-resolution, and high-precision information provided by pushbroom DAP facilitates used by a wide variety of user types such a towns and cities, small private timber owners, fire prevention groups, Non-Governmental Organizations (NGOs), counties, and state and federal organizations.

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