PANGU – Planet and Asteroid Natural scene Generation Utility

PANGU is a powerful set of tools for modelling the surfaces of planetary bodies such as Mars, the Moon, Mercury and asteroids using real and synthetic data. It has the ability to generate camera, LIDAR and RADAR images from any position and orientation. These images can be used for off-line and closed-loop simulations of planetary landing, surface roving and in-orbit rendezvous operations. Models of spacecraft and rovers can be imported from CAD software, wrapped in MLI, given realistic material properties and included within PANGU simulations.

PANGU is designed to provide a high degree of realism while operating at near real-time speeds on modern desktop PCs with graphics cards that support OpenGL 2.0 and programmable GPU shaders.

PANGU licences are sold by STAR-Dundee but the tool set was developed by the Space Technology Centre within the University of Dundee for ESA and is being used on several ESA studies and development projects aimed at producing precise and robust planetary lander guidance systems.

For more information about PANGU and other University of Dundee research activity see: www.spacetech.dundee.ac.uk/research


Watch the following simulations to see PANGU in action:

 

Product Features

  • Software tool

    • Simulates planets and asteroids
    • Simulates cameras and other sensors viewing those bodies
    • Developed specifically to test vision based GNC algorithms
    • Realistic and high performance
    • Extensively tested and validated so that it can be used for testing flight systems
  • Open loop testing

    • PANGU image sequence from known positions
    • Fed to vision based navigation system
  • Closed loop testing

    • Spacecraft dynamics simulation
    • Gives PANGU camera position and orientation
    • PANGU provides image of surface from that position
    • Position and orientation of target object
      • Can also be specified
      • Useful for asteroids

Technical Specs

  • Rendering features
    • Whole or partial planet, moon and asteroid surfaces

    • Multiple light sources:

      • Sun
      • Reflected light from planets/moons
      • Spacecraft-mounted spotlight
    • Dynamic Shadows implemented using Parallel-Split Shadow Maps

    • Hardware-accelerated planetary atmosphere model

  • Modelling features
    • Fractal terrain generator for planetary surface models and asteroids

    • Import PDS format digital elevation models (DEMs)

    • Support for different projections including polar stereographic

    • Import and enhance ICQ (asteroid) models

    • Stochastic techniques for modelling MLI sheets

    • XML based modelling language for spacecraft parts and materials

  • Reflectance functions
    • Hapke (Lunar regolith)

    • Oren-Nayar (rough cloth/plaster)

    • Lunar-Lambert, Minnaert (alternative Lunar surfaces)

    • Blinn-Phong and Lambert

    • Cook-Torrance (spacecraft surfaces)

  • Sensors & Projection modes
    • Optical images (perspective & orthographic)

    • Powerful camera model include:

      • Aperture, exposure time, ADC resolution
      • Shot noise, photo-response non-uniformity, read-out noise
      • Quantum efficiency, dark current, full well capacity, blooming
      • Optical distortion, PSF, baffles, radiation effects (e/p+)
    • Range and slope rendered images

    • Simulation of RADAR/LIDAR data using parametric sensor models

  • Integration with functional engineering simulators
    • TCP/IP server interface and Java API for e.g. Matlab/Simulink support.

  • Hardware requirements
    • Graphics hardware capable of running OpenGL 3.0 or later for many functions

    • Earlier versions support a restricted set of rendering features

Datasheets / Downloads