= 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:'''
[[Test Over11FGHIJ t11-10.seed|t11-10.seed]] ,
[[Test Over11FGHIJ t11-05.seed|t11-05.seed]]

'''Iteration seed file :'''
[[Test Over11FGHIJ Piterate2StSh-withoutayy.seed|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'''

{{attachment:sc_plotF.png||width="600"}}
{{attachment:sun_plotF.png||width="600"}}

'''Test 11G Viewing Conditions'''

{{attachment:sc_plotG.png||width="600"}}
{{attachment:sun_plotG.png||width="600"}}

'''Test 11H Viewing Conditions'''

{{attachment:sc_plotH.png||width="600"}}
{{attachment:sun_plotH.png||width="600"}}

'''Test 11I Viewing Conditions'''

{{attachment:sc_plotI.png||width="600"}}
{{attachment:sun_plotI.png||width="600"}}

'''Test 11J Viewing Conditions'''

{{attachment:sc_plotJ.png||width="600"}}
{{attachment:sun_plotJ.png||width="600"}}

== Results ( All with overlaps) ==

[[Test Over11FGHIJ Comparative Results]]

[[Test Over11F Results]]

[[Test Over11G Results]]

[[Test Over11H Results]]

[[Test Over11I Results]]

[[Test Over11J Results]]

== Conclusion ==