Differences between revisions 4 and 17 (spanning 13 versions)

Spacecraft Zenith Variations

Aim and Objectives

Purpose of test: To evaluate SPC's ability to represent a simplified 'boulder' which has a constant 20 degree slope.

Additional Objectives

To investigate the effect of including various combinations of viewing conditions, specifically:
- Variation of spacecraft azimuth;
- Variation of sun zenith (incidence);
- Variation of spacecraft zenith (emission angle);
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. Two boulder simulations were generated:

A single peak in an otherwise flat landscape of width ?? - Modeled using a single maplet (no overlaps).
Multiple peaks and (simplified) craters in an otherwise flat landscape of width approx. 22.5m.

Data

Data was generated by .
Location and parameters for evaluation area.
Image resolutions: 2cm/pixel.

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.

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

Test11S

Test11T

Test11U

Bigmaps

The following TAG1 bigmaps were tiled/iterated and evaluated:

Starting topography defined from: START1.MAP at pixel/line location 49, 49.

Step	GSD	Overlap Ratio	Q Size	Width
10cm-Tiling	10cm	1.3	130	20m
5cm-Tiling	5cm	1.3	250	20m
5cm-Iterations	5cm	-	-	20m

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

Results

Results with Overlaps:

Test Over11STU Comparative Results

Test Over11S Results

Test Over11T Results

Test Over11U Results

Results without Overlaps:

Test11S Results

Test11T Results

Test11U Results

-  ⇤ ← Revision 4 as of 2015-11-24 17:56:35 → 
  Size: 1589
  Editor: DianeLambert
  Comment:
+   ← Revision 17 as of 2015-11-25 13:43:43 → ⇥
  Size: 2821
  Editor: DianeLambert
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 5:
-'''Purpose of test:''' .
+'''Purpose of test:''' To evaluate SPC's ability to represent a simplified 'boulder' which has a constant 20 degree slope.
 Line 8:
- * .
+ * To investigate the effect of including various combinations of viewing conditions, specifically:
  * Variation of spacecraft azimuth;
  * Variation of sun zenith (incidence);
  * Variation of spacecraft zenith (emission angle);
 * To investigate the effect of the number of images and viewing conditions.
-Line 11:
+Line 15:
+The 'boulder' was simulated by generating a simple axe-symmetric, flat-topped cone (peak) with a constant 20 degree slope. Two boulder simulations were generated:
 * A single peak in an otherwise flat landscape of width ?? - Modeled using a single maplet (no overlaps).
 * Multiple peaks and (simplified) craters in an otherwise flat landscape of width approx. 22.5m.
-Line 15:
+Line 23:
- * Image Suite: Image resolutions: 50cm, 20cm, 10cm, 5cm.
  * emission
    * .
  * incidence
    * .
    * .
+ * Image resolutions: 2cm/pixel.
-Line 22:
+Line 25:
-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 Unfit Viewing Conditions]].
+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]].
-Line 29:
+Line 32:
+'''Test11S'''
-Line 30:
+Line 34:
-Spacecraft:
+{{attachment:Over11S_EE0057_sc_plot_resized.png}}
{{attachment:Over11S_EE0057_sun_plot_resized.png}}
-Line 32:
+Line 37:
-{{attachment:SC_perfectF2_POLARS.jpg||width=300}}
+'''Test11T'''
-Line 34:
+Line 39:
-Sun:
+{{attachment:Over11T_EE0057_sc_plot_resized.png}}
{{attachment:Over11T_EE0057_sun_plot_resized.png}}
-Line 36:
+Line 42:
-{{attachment:SUN_perfectF2_POLARS.jpg||width=300}}
+'''Test11U'''

{{attachment:Over11U_EE0057_sc_plot_resized.png}}
{{attachment:Over11U_EE0057_sun_plot_resized.png}}
-Line 42:
+Line 51:
-Starting topography defined from: ?
+Starting topography defined from: START1.MAP at pixel/line location 49, 49.
-Line 45:
+Line 54:
-||35cm-Tiling||
||18cm-Tiling||
||9cm-Tiling||
||5cm-Tiling||
+||10cm-Tiling||10cm||1.3||130||20m||
||5cm-Tiling||5cm||1.3||250||20m||
||5cm-Iterations||5cm||-||-||20m||
-Line 50:
+Line 58:
+'''Tiling/Iteration Parameters'''
-Line 51:
+Line 60:
-'''Iteration Parameters'''
+Auto-Elimination Parameters: 0, 60, .25, .25, 0, 3.
-Line 53:
+Line 62:
-Reset albedo/slopes: ?YES
+Reset albedo/slopes: NO
-Line 55:
+Line 64:
-Calculate Central Vector: ?YES
+Determine Central Vector: YES
-Line 57:
+Line 66:
-Differential Stereo: ?YES
+Differential Stereo: YES
-Line 59:
+Line 68:
-Shadows: ?NO
+Shadows: YES
-Line 63:
+Line 72:
-[[Test11STU Comparative Results]]
+'''Results with Overlaps:'''

[[Test Over11STU Comparative Results]]

[[Test Over11S Results]]

[[Test Over11T Results]]

[[Test Over11U Results]]

'''Results without Overlaps:'''

Spacecraft Zenith Variations

Aim and Objectives

Methodology

Results

Discussion