SPOT6. First 3D assessments. August 30 h, Astrium Services 2012

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1 Astrium Services 2012 SPOT6 First 3D assessments August 30 h, 2013

2 SPOT series 27 Years of experience, +100 billions km² archive SPOT 1 to SPOT 5 were funded by the French Government (through CNES) SPOT 6 and SPOT 7: fully funded -and operated- by Astrium Services

3 SPOT 6 & 7: leveraging over SPOT 5 SPOT 5 SPOT 6 SPOT 7 Mass kg 712 kg Design Lifetime 5 years 10 years Product resolution / swath 2. 5 m / 2 x 60 km 1.5 m / 60 km + multi-strip in single pass Image geometry 25-30m rms native (w/out GCP) HRS sensor to build Reference3D 50m rms native (w/out GCP) 5-10m CE90 with Reference3D Daily acquisition capability Average 2 Mkm² / day Average 2.2 Mkm² / day / sat Agility Roll only (mirrors) All axes, 30 in 14 s Single pass stereo capability Stereo through HRS (5m P) Stereo and tri-stereo (1.5m PXS) System tasking reactivity 1 mission plan / day 6 missions plans / day / satellite

4 SPOT 6 commercial offer SPOT 6 main assets 1.5m resolution (2.2m GSD) Ultimate reactivity Very large collection capacity Excellent 3D accuracy Date - 4

5 Astrium Services 2012 SPOT 6 extract over Dar es Salam (Tanzania)

6 SPOT 6-7 Tasking and Collection capacity & efficiency A system fully designed and configured to cover broad areas, in mono and stereoscopy 4 weather forecasts per day Increased ratio of cloud-free images Huge onboard storage capacity No more memory overload conflicts Agility Faster access to the next area More collection capacity 6 tasking plans per day SPOT 6 & SPOT 7 together 6M km² every single day

7 SPOT 6-7: Multistrip in monopass 300 km 150 km

8 Standard acquisition mode is North-South Yaw steering Image footprint is not orbit dependant Best fitted to achieve large coverages Excellent for stereo overlap.

9 SPOT 6 in action Coverage of Mali M km² 100% cloud free 5 Months only October 17 th - March 15 th

10 Stereoscopy Tri-stereoscopy B/H Stereo Tristereo Maximum length of stereo SPOT 6 images (in km) Minimum B/H values to allow the stereo / tri-stereo full coverage of a 1 x 1 geocell in one single SPOT 6 pass (30 max. incidence angle): 0.3 for stereo ; 0.6 for tri-stereo Date - 14

11 First SPOT 6 DEM Montagne Ste Victoire Provence France Date - 15

12 First 3D assessment of SPOT 6 Test sites (surface 3,200 to 4,000 km² ) Hobart, Australia: 3 images / 14 GCPs, 85 vertical checks Ste Victoire, France: 4 images / 13 GCPs, 113 vertical checks Melbourne, Australia: 3 images / 7 GCPs, 98 vertical checks These test DEMs were produced with a 3m posting Melbourne and Hobart are heavily built-up areas. 1.2m CE90 absolute horizontal accuracy assessed against 199 horizontal Check Points on Melbourne test site. Date - 16

13 First 3D results from SPOT 6 Check Mean (m) LE90 (m) B/H Check Mean (m) LE90 (m) B/H MEL MEL MEL triplet HOB HOB HOB triplet SPOT 6 DEM vertical accuracy as measured on Melbourne and Hobart Min/max error range stands around +/- 9m (built up areas) Date - 17

14 First 3D results from SPOT 6 Check Mean (m) LE90 (m) B/H VIC VIC VIC VIC pairs SPOT 6 DEM vertical accuracy as measured on Montagne Ste Victoire Min/max error range stands around +/- 4m (open area) Date - 18

15 Conclusion about 3D performance of SPOT 6 SPOT 6 shows a pixel-sized vertical accuracy (1.5m LE90), achieved from the higher B/H ratios, say from 0.45 and more. B/H below provide not optimized results. Using a triplet reduce the number of voids, approximately by half, whatever the minimum B/H ; useful for urban or steep areas. For most demanding applications, the study suggests the following «optimal» tri-stereo configuration: / ±0 / SPOT 6 is an adequate source of elevation to extract cartographic-quality contour lines up to a ±5m interval, whithin an adequate state-of-the-art production process (breaklines, edition.). Date - 19

16 SPOT 6 data available for freeeeeeeeee Date - 20

17 Thank you! Contact : marc.bernard@astrium.eads.net