Test F3G - Navigation Error

Goal: Identify a limit to how large the navigation error can be and still get a good solution. Also, see if small errors converge to the same state (i.e. that within certain boundaries, error is fully removed)

Test Set Up

Data: Approach, Preliminary Survey, and Detailed Survey PolyCam and MapCam Images:

• All NOMINALS and SUMFILES are perturbed as per F1A - Baseline.
• All perturbations are random, no systematic perturbation are included (i.e. there is no simulation of spacecraft position or pointing drift).
• Detailed Survey Images:

  • Equatorial Stations MapCam images at approx. 30cm and 20cm pixel resolution.

  • Baseball Diamond Nadir (10am and 2pm stations) PolyCam images at approx. 5cm pixel resolution.

  • Baseball Diamond Off-Nadir (10am station looking at 12pm, and 2pm station looking at 12pm) PolyCam images at approx. 5cm pixel resolution.

Start: 35cm Preliminary Shape Model and 150cm, 75cm, and 35cm global maplets

Build:

• Extended TAG Site 1 (50x50m) at 20cm, centered at -8.027, 262.768 (lat, wlong).
• Extended TAG Site 1 (50x50m) at 10cm, centered at -8.027, 262.768 (lat, wlong).
• Extended TAG Site 1 (50x50m) at 5cm, centered at -8.027, 262.768 (lat, wlong).
• Evaluate 20mx20m region centered on TAG Site 1, images TBD which are fully contained in the TAG site and fully cover a single 5cm maplet near the center of the TAG site.

Sub-Test F3G-1 to F3G- 7

• Run with 3x, 2x, 1.5x, 1x, 0.75x, 0.5x, 0.25x the baseline perturbation.

• Only Detailed Survey PolyCam perturbations altered.

Test Procedures

Summary:

• Ingest and register the Detailed Survey MapCam and PolyCam images.

• Autoregister the MapCam images to the 150cm, 75cm, and 35cm maplets in a 100m x 100m region centered on TAG site 1.

• Iterate maplets contained in a 100m x 100m region centered on TAG site 1.
• Clean until tiled and correlated states achieved.
• Create a large BIGMAP at a resolution of 20cm with a width of 50m.
• Iterate maplets contained in a 100m x 100m region centered on TAG site 1.
• Clean until tiled and correlated states achieved.
• Create a large BIGMAP at a resolution of 10cm with a width of 50m.
• Iterate maplets contained in a 100m x 100m region centered on TAG site 1.
• Clean until tiled and correlated states achieved.
• Run GEOMETRY, option 2 to update the position of the spacecraft.
• Iterate maplets contained in a 100m x 100m region centered on TAG site 1.
• Clean until tiled and correlated states achieved.
• Create a large BIGMAP at a resolution of 5cm with a width of 50m.
• Iterate maplets contained in a 100m x 100m region centered on TAG site 1.
• Clean until tiled and correlated states achieved.
• Achieve imaged state.
• Achieve fitted state.
• Run GEOMETRY, option 2 to update the position of the spacecraft.
• Achieve residualed state.
• Achieve re-tiled state.
• Achieve sigma'ed state.

Full details contained here: Test F3G-Navigation Error - Test Procedure.

Evaluate:

• Change in Spacecraft Position/Pointing - evaluate the observed-actual spacecraft position and pointing;
• Evaluate the accuracy a 20mx20m region centered on TAG Site 1.