Beginning on Sol 296, Viking Lander 1 began constructing conical piles of soillike materials by collecting materials from the sample field and depositing them on top of rocks and among rocks with the surface sampler collector head (a scoop).
The purpose of the piles of soillike materials was to create topographic configurations of disturbed materials that are not in equilibrium with the present-day environment of Mars.
All but one of these piles were made of a weak powder-like "soil" and one was made of a garden-like "soil."
Three of these piles can be seen in high-resolution (0.04 degrees/pixel) Camera 1 picture 11J013/921. They look like miniature stratovolcanoes. (In this image, the sun was toward the right so that the shadows are on the left sides of piles and rocks)
Can you also find these three piles in low-resolution (0.12 degrees/pixel) Camera 1 picture 11J081/1402?
Splendid! You are a good observer.
Did you also notice that you can see the horizon and sky near the top? The elevation angles go from +0.66 degrees to -60.66 degree. Starting and ending azimuths are 264.5 and 287.0 degrees.
Compare picture 11J081/1402 with picture 11J171/2068.
Lander 1 took many pictures of the same scene separated by many sols in order to detect changes. Three sets of such images are narrow low-resolution color pictures taken of the sky and surface. In the color images below, the horizon and a rock named "Big Joe" are included; Big Joe is 8 to 10 meters from Camera 1. The starting and ending azimuths for each picture are 160.0 and 165.56 degrees and starting and ending elevations are +30.66 and -30.66 degrees. About how tall is Big Joe?
Sol 1409 red, green, blue image.
Sol 1742 red, green, blue image.
Sol 2149 red, green, blue image.
What is different between these three sets of images?
What do the differences represent?
What do you think happened on Mars?
About when did it happen?
Which way did the wind blow?
What are the largest sizes of fragments that were moved?
What are the largest sizes of fragments that remained in pile #5?
Why don't you write a story about what happened? Scientists have to write stories (they call them papers).
The map that has been furnished (see note, link, and warning below) shows a plan view of Viking Lander 1.
If you look carefully at the map, you can see two pairs of concentric circles with "plus" signs in their centers. They are labeled Camera 1 (left one) and Camera 2 (right one).
The dashed lines extending from the "pluses" are the reference directions for each camera. The reference direction for Camera 1 extends to the right of the Camera 1 "plus" and the reference direction for Camera 2 extends to the left of the Camera 2 "plus."
Can you find the three piles of "soil" within the area formed by the sample field and the wedges on the map?. What else can you see in the images within the wedges on the map? Can you find two other conical piles (#1 and #4) on the map?.
(Note. Approximate "boltdown and diode" corrections are included in the azimuths given)
(Note. The working map on this WEB site, which is linked below, is a suitable base map. The extended mission map in the back of Professional Paper 1389 is also suitable. If the Lander 1 map is difficult to read, or too large for your computer and you do not have Professional Paper 1389, you can request copies of the map from James E. Tillman or Henry J. Moore .
This section includes a link to the map for this exercise. Do not
click on the link below unless you have a very fast link, a large
memory and a capable system. The biggest, fastest workstations, with
high speed interfaces take about 30 seconds to ingest and display
Lander 1, end extended mission. [Bit Map: 3.98 Mbytes]
|The data, maps, and text for
this exercise were supplied by:
Dr. Henry John Moore
Astrogeology Team MS 975
U.S. Geological Survey
345 Middlefield Road
Menlo Park, CA 94025
|The images, layout, and presentation
for this exercise were supplied by;
James E. Tillman, Research Prof.
(firstname.lastname@example.org ) and
George F. LeCompte (a volunteer)
Department of Atmospheric Sciences
PO Box 351640
University of Washington
Seattle, WA 98195-1640