Spacecraft Azimuth 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 Tests 11 F, G, H, I & J, Spacecraft Azimuth Variations

To investigate the effect of varying the combination of spacecraft azimuths with respect to a landmark 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 axi-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.

Entire 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
Portion Truth Map (011TRU.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 Eric.
Image resolutions: 2cm/pixel.

Viewing Conditions

Name	Sun	S/C Az	S/C Zenith	Total Number of Images
Test11F	45, 0, -45	every 20	45	72
Test11G	45, 0, -45	every 30	45	48
Test11H	45, 0, -45	every 45	45	32
Test11I	45, 0, -45	every 60	45	24
Test11J	45, 0, -45	every 90	45	16

Test 11F Viewing Conditions

Test 11G Viewing Conditions

Test 11H Viewing Conditions

Test 11I Viewing Conditions

Test 11J Viewing Conditions

Results ( All with overlaps)

Test Over11FGHIJ Comparative Results

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Expert

About

Spacecraft Azimuth Variations

Aim and Objectives

Methodology

Results ( All with overlaps)

Discussion

Conclusion

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Language translation		Specify language to use for date and time format.
Dynamic code block		Shrink code blocks on page.
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