Space Features

• Polyline - per-vertex color for passes. Will materials on polylines work?
• Viewing in LLVH - #531
• Draw plans perpendicular to orbits
• More precise sun position - #391
• Covariance interpolation (in czml-writer)
• Stored views per track
• Sensor improvements
  • Eliminate jitter - #359
  • Narrow six-arc-second field-of-view. Display condition to draw a polyline?
  • Narrow sensor like a fan
  • Wide sensor with a cap
  • Billboard aligned with sensor boresight (use a model?)
  • Draw a cone from the Sun to Earth's silhouette. Compute custom sensor?

Done

• Inertial frame
• Ellipsoid improvements
  • Eliminate jitter - #392
  • Zoom inside - #390