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Size: 3113
Comment:
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Size: 3144
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 40: | Line 40: |
| [[Test Over11STU t11-05.seed]] | [[Test Over11STU t11-05.seed|t11-05.seed]] |
| Line 43: | Line 43: |
| [[Test Over11STU Piterate2StSh-withoutayy.seed]] | [[Test Over11STU Piterate2StSh-withoutayy.seed|Piteate2StSh-woAYY]] |
Spacecraft Zenith Variations
Aim and Objectives
Purpose of Test 11: To evaluate SPC's ability to represent a simplified 'boulder' which has a constant 20 degree slope.
Objective for Test 11 S, T & U, Spacecraft Zenith Variations
- To investigate the effect of varying the combination of spacecraft zenith (emission angle) contained in the image suite;
- To investigate the effect of the number of images and viewing conditions.
Methodology
The 'boulder' was simulated by generating a simple axe-symmetric, flat-topped cone (peak) with a constant 20 degree slope. Multiple peaks and (simplified) craters are randomly placed in an otherwise flat landscape of width approx. 22.5m.
Truth map: REGION.MAP
Bigmaps
The following TAG1 bigmaps were tiled/iterated and evaluated:
Starting topography defined from: START1.MAP at pixel/line location 49, 49 (= REGION.MAP at p/l 1125, 1125).
Step |
GSD |
Overlap Ratio |
Q Size |
Width |
Center |
START.MAP |
20cm |
- |
49 |
20m |
REGION.MAP p/l 1125, 1125 (center) |
10cm-Tiling |
10cm |
1.3 |
130 |
20m |
START1.MAP, p/l 49, 49 |
5cm-Tiling |
5cm |
1.3 |
250 |
20m |
START1.MAP, p/l 49, 49 |
5cm-Iterations |
5cm |
- |
- |
20m |
START1.MAP, p/l 49, 49 |
Evaluation Map |
1cm |
- |
200 |
4m |
REGION.MAP, p/l 996, 1005 |
Tiling/Iteration Parameters
Auto-Elimination Parameters: |
0, 60, .25, .25, 0, 3 |
Reset albedo/slopes |
NO |
Determine Central Vector |
YES |
Differential Stereo |
YES |
Shadows |
YES |
Tiling seed files: t11-10.seed , t11-05.seed
Iteration seed file : Piteate2StSh-woAYY
Data
- Data was generated by ??.
- Image resolutions: 2cm/pixel.
Name |
Sun |
S/C Az |
S/C Zenith |
Total Number of Images |
Test11S |
45, 0, -45 |
every 45 |
0, 30, 60 |
80 |
Test11T |
45, 0, -45 |
every 45 |
0, 20, 40, 60 |
112 |
Test11U |
45, 0, -45 |
every 45 |
0, 15, 30, 45, 60 |
144 |
Note that a larger image suite was planned and produced than was utilized during test. The images for a number of planned viewing conditions were eliminated due to image quality related to the viewing conditions being unfit for SPC. For further details are contained here:
Test11STU Unsuitable Viewing Conditions.
Test11S Viewing Conditions
Test11T Viewing Conditions
Test11U Viewing Conditions
Results
Results with Overlaps:
Test Over11STU Comparative Results
Results without Overlaps: