CTX Digital Terrain Model of Mars InSight Landing Site Ellipse 5 West

Primary Authors

Robin L. Fergason

Originators

R.L. Fergason, R.L. Kirk, G. Cushing, D.M. Galuszka, M.P. Golombek, T.M. Hare, E. Howington-Kraus, D.M. Kipp, B.L. Redding

Publisher

USGS Astrogeology Science Center

Publication Date

2016-10-11

Abstract

This digital terrain model (DTM) was produced as part of an effort to characterize topography within candidate landing ellipses for the Mars InSight mission and to aid entry, descent, and landing simulations for the mission. The DTM was constructed from a pair of CTX images using the stereo photogrammetry software SOCET SET® (BAE Systems). The DTM has been used to orthorectify the input images at 6 meters/pixel and to calculate topographic slopes at a 20 meter baseline. These are available under the "Derived Products" section on the right of this page. Reference and Preferred Citation: R.L. Fergason, R.L. Kirk, G. Cushing, D.M. Galuszka, M.P. Golombek, T.M. Hare, E. Howington-Kraus, D.M. Kipp, B.L. Redding, 2016, "Analysis of Local Slopes at the InSight Landing Site on Mars," Space Sci. Rev., 1572-9672, doi:10.1007/s11214-016-0292-x.

Purpose

This digital terrain model (DTM) was produced as part of an effort to characterize topography within candidate landing ellipses for the Mars InSight mission and to aid entry, descent, and landing simulations for the mission.

Contact and Distribution

Format

Digital Elevation Model, Landing Site Map, Raster Data

Access Constraints

Public Domain

Access Scope

Use Constraints

Please Cite Authors

Edition

1

Supplemental Information

https://dx.doi.org/10.1007/s11214-016-0292-x

Native Data Set Environment

ISIS v3

Astrogeology Theme

Landing sites, Photogrammetry, Topography

Mission Names

Mars Reconnaissance Orbiter

Instrument Names

CTX

Online Package Link

https://astrogeology.usgs.gov/search/map/ctx_digital_terrain_model_of_mars_insight_landing_site_ellipse_5_west

External File Size

44 MB

Online File Link

https://planetarymaps.usgs.gov/mosaic/insight_landing_site_dtm/D18_034150_1838_D17_033728_1838_20m_DTM_destripe.tif

Contact Address

2255 N. Gemini Drive

Contact City

Flagstaff

Contact State

AZ

Contact Postal Code

86001

Contact Email

astroweb@usgs.gov

Currentness Reference

Publication date

Progress

Complete

Update Frequency

None planned

Process Description

The DTM processing work-flow consists of the following steps: (1) Automatically generate and place tiepoints in the stereoimages and perform a relative adjustment to bring the images into alignment (2) Create a low resolution (typically 100 m/post) DTM from the relatively adjusted stereopair (3) Absolutely control the low resolution DTM to the available reference data (MOLA, or HRSC) using the Ames Stereo Pipeline program pc align (4) Apply the transformation to the ground coordinates previously calculated for the tiepoints, placing them in alignment with the reference (5) Perform a final adjustment with the tiepoints converted to XYZ points at their transformed locations (6) Perform interactive quality control and editing to remove artifacts introduced in the matching step (7) Export the final DTM and orthorectified images The exported DTM is then used to calculate adirectional topographic slopes at a horizontal baseline of 20 meters.

Source Title

CTX

Source Online Linkage

http://pds-imaging.jpl.nasa.gov/volumes/mro.html

Source PDS Archive

Mars Reconnaissance Orbiter

Horizontal Positional Accuracy Report

Accurate to Control Net

Vertical Positional Accuracy Report

Accurate to Control Net

Geospatial Information

Target

Mars

System

Mars

Minimum Latitude

2.7638951776345544

Maximum Latitude

4.8306715369971345

Minimum Longitude

137.05276960948535

Maximum Longitude

137.69629016406054

Direct Spatial Reference Method

Raster

Object Type

Grid Cell

Raster Row Count (lines)

6054

Raster Column Count (samples)

1885

Bit Type (8, 16, 32)

32

Quad Name

MC-15

Radius A

3396190

Radius C

3396190

Bands

1

Pixel Resolution (meters/pixel)

20.235801709537

Scale (pixels/degree)

2929.199365270042

Map Projection Name

Equirectangular

Latitude Type

Planetocentric

Longitude Direction

Positive East

Longitude Domain

-180 to 180