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NASA/JPL/University of Arizona/USGS
Topography of Moving Dunes in Nili Patera
Many HiRISE targets are imaged twice, close together in time, with each image having a different viewing angle. From this, we are able to make digital elevation models (DEMs) with precisions of 10s of centimeters. Doing this for dunes can be particularly challenging, as they commonly migrate.

However, if the images are close enough together in time, or are inactive, a good model can be made. This is the case here, where an elevation model was produced of the Nili Patera dune field.

These dunes are active and, by computing the height of the moving dunes using this DEM, researchers have determined the sand flux (sand volume per length per time) and find that it similar to that seen for dunes in Antarctica.

The research also finds that the dunes are moving as coherent masses of mobile sand. This work has important implications, as it shows that wind processes on Mars can transport considerable volumes of sand, which not only contributes to dune migration, but also abrasion (sand blasting) of the surface.

Written by: Nathan Bridges
 
DTM & ORTHOIMAGES
DTEEC_017762_1890_018039_1890_A01   (430 MB)

ESP_023142_1890_IRB_A_01_ORTHO
(169 MB)

ESP_023920_1890_IRB_A_01_ORTHO
(172 MB)

ESP_020729_1890_IRB_A_01_ORTHO
(170 MB)

ESP_023920_1890_RED_A_01_ORTHO
(265 MB)

ESP_023142_1890_RED_A_01_ORTHO
(300 MB)

ESP_020729_1890_RED_A_01_ORTHO
(329 MB)

PSP_005684_1890_IRB_C_01_ORTHO
(10 MB)

PSP_005684_1890_RED_C_01_ORTHO
(18 MB)

PSP_005684_1890_IRB_A_01_ORTHO
(135 MB)

PSP_005684_1890_RED_A_01_ORTHO
(213 MB)

ESP_020729_1890_IRB_C_01_ORTHO
(13 MB)

ESP_023920_1890_IRB_C_01_ORTHO
(14 MB)

ESP_023142_1890_IRB_C_01_ORTHO
(13 MB)

ESP_020729_1890_RED_C_01_ORTHO
(28 MB)

ESP_023142_1890_RED_C_01_ORTHO
(26 MB)

ESP_023920_1890_RED_C_01_ORTHO
(23 MB)

ESP_017762_1890_IRB_C_01_ORTHO
(24 MB)

ESP_023353_1890_IRB_C_01_ORTHO
(13 MB)

ESP_023353_1890_RED_C_01_ORTHO
(25 MB)

ESP_023353_1890_IRB_A_01_ORTHO
(161 MB)

ESP_023353_1890_RED_A_01_ORTHO
(290 MB)

ESP_017762_1890_IRB_A_01_ORTHO
(297 MB)

ESP_023564_1890_RED_C_01_ORTHO
(28 MB)

ESP_022364_1890_RED_A_01_ORTHO
(255 MB)

ESP_023564_1890_IRB_C_01_ORTHO
(13 MB)

ESP_022364_1890_IRB_A_01_ORTHO
(145 MB)

ESP_018039_1890_IRB_C_01_ORTHO
(20 MB)

ESP_018039_1890_IRB_A_01_ORTHO
(259 MB)

ESP_022364_1890_RED_C_01_ORTHO
(23 MB)

ESP_023564_1890_RED_A_01_ORTHO
(340 MB)

ESP_022364_1890_IRB_C_01_ORTHO
(11 MB)

ESP_023564_1890_IRB_A_01_ORTHO
(172 MB)

ESP_023076_1890_IRB_A_01_ORTHO
(197 MB)

ESP_023076_1890_RED_A_01_ORTHO
(323 MB)

ESP_023076_1890_IRB_C_01_ORTHO
(16 MB)

ESP_023076_1890_RED_C_01_ORTHO
(29 MB)

ESP_018039_1890_RED_C_01_ORTHO
(43 MB)

ESP_021652_1890_RED_A_01_ORTHO
(318 MB)

ESP_017762_1890_RED_C_01_ORTHO
(41 MB)

ESP_021652_1890_IRB_A_01_ORTHO
(157 MB)

ESP_017762_1890_RED_A_01_ORTHO
(462 MB)

ESP_021652_1890_RED_C_01_ORTHO
(26 MB)

ESP_018039_1890_RED_A_01_ORTHO
(512 MB)

ESP_021652_1890_IRB_C_01_ORTHO
(12 MB)

PSP_004339_1890_IRB_A_01_ORTHO
(156 MB)

PSP_004339_1890_RED_A_01_ORTHO
(411 MB)

PSP_004339_1890_IRB_C_01_ORTHO
(11 MB)

PSP_004339_1890_RED_C_01_ORTHO
(31 MB)

Full directory listing

DTM EXTRAS
ESP_020729_1890_IRB_C_01_ORTHO
(Annotated Browse)
ESP_018039_1890_IRB_C_01_ORTHO
(Annotated Browse)
PSP_005684_1890_RED_C_01_ORTHO
(Annotated Browse)
ESP_023353_1890_IRB_C_01_ORTHO
(Annotated Browse)
ESP_022364_1890_IRB_C_01_ORTHO
(Annotated Browse)
ESP_017762_1890_RED_C_01_ORTHO
(Annotated Browse)
ESP_023076_1890_RED_C_01_ORTHO
(Annotated Browse)
ESP_018039_1890_RED_C_01_ORTHO
(Annotated Browse)
ESP_023564_1890_RED_C_01_ORTHO
(Annotated Browse)
ESP_021652_1890_IRB_C_01_ORTHO
(Annotated Browse)
DTEEC_017762_1890_018039_1890_A01
(Annotated Browse)
ESP_023920_1890_IRB_C_01_ORTHO
(Annotated Browse)
ESP_023142_1890_RED_C_01_ORTHO
(Annotated Browse)
PSP_004339_1890_RED_C_01_ORTHO
(Annotated Browse)
PSP_005684_1890_IRB_C_01_ORTHO
(Annotated Browse)
ESP_020729_1890_RED_C_01_ORTHO
(Annotated Browse)
ESP_017762_1890_IRB_C_01_ORTHO
(Annotated Browse)
ESP_022364_1890_RED_C_01_ORTHO
(Annotated Browse)
ESP_023076_1890_IRB_C_01_ORTHO
(Annotated Browse)
ESP_023353_1890_RED_C_01_ORTHO
(Annotated Browse)
ESP_023142_1890_IRB_C_01_ORTHO
(Annotated Browse)
PSP_004339_1890_IRB_C_01_ORTHO
(Annotated Browse)
ESP_023920_1890_RED_C_01_ORTHO
(Annotated Browse)
ESP_023564_1890_IRB_C_01_ORTHO
(Annotated Browse)
ESP_021652_1890_RED_C_01_ORTHO
(Annotated Browse)
DTEEC_017762_1890_018039_1890_A01
(Shaded Relief)
DTEEC_017762_1890_018039_1890_A01
(Color Altimetry)

Extras Read me
Extras directory listing
STEREO PAIR
Left observation
ESP_017762_1890

Right observation
ESP_018039_1890

Latitude (center)
8.781°

Longitude (center)
67.33°

Map scale
1.01 meter/pixel

North azimuth
270°


RESOURCES
About DTMs
How to use DTMs