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Orbiter (simulator)

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Orbiter
Screenshot of a Space Shuttle lift-off from Cape Canaveral
Developer(s)Martin Schweiger
Platform(s)PC (Microsoft Windows)
ReleaseLatest stable release
8 June 2010
Genre(s)Simulation
Mode(s)Single player

Orbiter is a freeware space flight simulator program developed to allow users to operate simulated spacecraft using a detailed and realistic flight model. The developer, Martin Schweiger, felt that space flight simulators at the time were lacking in realistic physics based flight models and decided to write a simulator that made learning physics concepts enjoyable.[1]

Orbiter was first released on 27 November 2000 and several new versions have been released, with the most recent version 100606 released for free download on 8 June 2010.

Orbiter has now been used as a teaching aid in classrooms,[1] and a community of addon developers have created several addons to allow users to fly assorted real and fictional spacecraft and adding new planets or solar systems.[2][3]

About the simulator

Orbiter allows users to explore the solar system on a number of spacecraft: both realistic, such as the Space Shuttle Atlantis; and fictional, such as the "Delta-Glider."[2] The developer Martin Schweiger has included fictional spacecraft to allow for easier flights for less experienced users.[1]

Orbiter is realistic enough to re-enact historical space flights, while at the same time the ability to fly fictional ships allows the player to make timely travel around the solar system. A spacecraft's engines are defined only by the amount of thrust they put out and amount of fuel they use. This allows anything from solar sails to conventional rocket engines, to futuristic nuclear fission and fusion drives to be simulated.[citation needed] Orbital, sub-orbital, and interplanetary travel are all supported.[citation needed] Docking and attachment systems allow the user to simulate docking with a space station or other spacecraft and also rendezvous with and retrieve a satellite[citation needed]. The user can also attempt to build a space station in orbit.[4]

The solar system presented in Orbiter consists of the sun, the eight planets and their major moons.[citation needed] Dwarf planets, asteroids, and comets are not included in the solar system included with Orbiter but exist as add-ons.[5] Although Orbiter contains a database of over 100,000 stars, these are for display purposes only and interstellar travel is currently not possible in Orbiter.[citation needed] Also included is a planetarium mode with three main features.[citation needed] Ecliptic and celestial grids can be overlaid onto the star map along with labels of the constellations and other celestial markers. Secondly, labels indicating the location and identity of objects in the solar system, such as planets, moons, or vessels, can be activated to appear within a certain proximity based on their type. Finally, labels can be put on the celestial bodies in the solar system at certain coordinates on their surface for indicating cities, historical markers, geological formations, and other interesting sites.[4]

The Delta Glider in low Venusian orbit, showing the 3D Virtual Cockpit, including Multi-functional displays (MFDs) and the Head-up Display (HUD)

Orbiter aims to be a realistic simulator rather than an arcade game.[citation needed] Planetary motion, gravitation effects, free space and atmospheric flight are accurately modeled.[6][7] The position of the planets in the solar system is calculated by the VSOP87 solution, the Earth-Moon system is simulated by the ELP2000 model.[citation needed] Space physics and orbital mechanics can be complicated,[citation needed] and the learning curve is very steep even for those familiar with flight simulations.[citation needed] Because it uses newtonian physics, faster-than-light travel is possible without any of the adverse effects that would be experienced in real life. The limits for velocity and distance from the sun are 1.79769 x 10^308 m/s and 1.79769 x 10^308 m, respectively, or 5.82593 x 10^291 parsecs, displayed as "5e+291pc" in the game. Once the value exceeds this, it resets to "1e+000pc" and remains there until the game is restarted. However, experiments show that the program becomes less stable during spacecraft travel at many orders of magnitude of the speed of light.

The traditional simulated control interface in Orbiter consists of two Multi-function displays and a Head-Up Display.[citation needed] Each features several modes of operation. In this mode all commands are given via the keyboard or mouse. It gives an unobstructed view and all relevant information. The simulator also supports customized control panels and instruments, including 3D virtual cockpits and 2D instrument panels.[citation needed] These allow the player to use the mouse to interact with the panels, and allows more complex systems and instruments that are customized for each ship. The addition of a virtual cockpit also allows the player to freely look around from the perspective of the pilot.

The default version of Orbiter has no sound.[citation needed] However, a popular add-on called "OrbiterSound"[8] is available. It provides engine noises, ambient sounds in the cabin, radio chatter and other sounds including mp3 playlists. Options enable the user to maintain a realistic silence when the craft is viewed externally during space flight.

The patch 060929 features support for TrackIR.

Included spacecraft

Orbiter's standard distribution includes real and fictional spacecraft and space stations:

Real vessels

Space Shuttle Atlantis
The Orbiter version of a Space Shuttle. It does not have the guidance systems and autopilots of the real Space Shuttle, which makes it one of the hardest spacecrafts to fly in Orbiter But nowadays, on the latest version of Orbiter, it now has a guidance system and a launch autopilot, making not the Atlantis anymore hard to fly.[vague][citation needed] To make it a bit easier, the flight model has more propellant than the real Space Shuttle and its engines are a bit more effective.[citation needed]
Space Station Mir
Orbiter's model of the historic Russian space station. Unlike its real counterpart, it was not deorbited and is placed in an orbit which is closer to the ecliptic plane. This was done initially to make Mir a good origin of interplanetary flights in earlier versions of Orbiter, when Orbiter also automatically refueled spacecraft on docking with a space station. Using the scenario editor, it's still possible to refuel in-flight or start the simulation docked and with full tanks.
International Space Station
In a similar orbit as the real ISS and in a completed state, it shows modules which are no longer planned to be installed on the real ISS.
Hubble Space Telescope
A model of the real HST, it gets used together with Orbiter's Space Shuttle Atlantis.
Long Duration Exposure Facility Satellite
Like the Hubble Space Telescope, it's one of the example payloads for Orbiter's Space Shuttle.

Fictional vessels

Delta-glider Mk.4
A delta wing spaceplane, which is rather easy to fly and thus good for the first steps into Orbiter. A variant of the Delta-glider Mk.4 is also included, the Delta-glider-S, which trades some of the propellant capacity for a scramjet propulsion system. It's possible to travel from Earth to Mars with the Delta-glider, making it possible to practice interplanetary missions. It is technically a single stage to orbit spaceplane.
Shuttle-A
A small space freighter, which can transport six large cargo containers with a total mass of 120 metric tons. It doesn't have an aerodynamic hull so it is at home on the Moon and Mars. Its cargo containers are equipped with automatic parachutes. Using the parachutes, it's possible to simulate a cargo run from a lunar base to Earth and back, dropping the cargo while still in the upper atmosphere. Its high inertia and inferior aerodynamics make it harder to fly than the Delta-glider.
Shuttle-PB
A small personal spacecraft, with high agility and a futuristic performance. As its main purpose is to serve as simple SDK example for add-on developers, it lacks many complex details of other included ships in Orbiter like 2D or 3D cockpits or animations.
Dragonfly
A complex manned space tug for the construction of space stations. It simulates its various subsystems at a higher complexity than all other standard spacecraft in Orbiter, being a good example of the technical possibilities of Orbiter's SDK. Its flight model is also within the possibilities of current technology, making it a so-called "nearly realistic" spacecraft.
Lunar Wheel station
A fictional wheel shaped station in lunar orbit, inspired by Space Station V from the beginning of 2001: A Space Odyssey.. As a rotating space station, it is a challenge to dock with it.
Carina
A small fictional science satellite, which is used as payload on Orbiter's Space Shuttle. It is a completely inert payload currently. It is based on a proposed European reentry capsule experiment, to be launched on the Ariane 4, which later resulted in the ARD[9].

Orbiter add-ons

Orbiter recreation of the launch of the Mercury-Atlas 6 mission.

Orbiter has attracted a sizable number of people centered around several forums and repositories, such as Orbit Hangar Mods.

While the source is not editable, an extensive API enables Orbiter users to contribute by creating add-ons. Many spacecraft are available for download as add-ons, ranging from the Soviet Vostok spacecraft to Project Mercury and the Apollo program[10][11]. Another popular category of add-ons are modifications of the standard spacecraft of Orbiter, ranging from simple visual changes to complex simulations of the internal subsystems of these fictional crafts. Examples of these more advanced default spacecraft include the DeltaGlider IV[12] and the XR Series of vessels[13].

Add-ons are also available for new bases, MFD modes, extensions of the simulation menu, space stations, planets, and even other solar systems. Since Orbiter 2006, a scenario editor is included, which can also be extended for supporting the special attributes of add-on vessels.[citation needed]

Further examples

Real-world

Fictional

See also

Notes

  1. ^ a b c "Techhaze interview with Martin Schweiger". Retrieved 2010-08-05.
  2. ^ a b "The Space Review". Retrieved 2010-08-05.
  3. ^ "David Kluemper's Simulators". Retrieved 2010-08-05.
  4. ^ a b "Orbiter Manual" (PDF). Retrieved 2009-04-17.
  5. ^ "Techmixer Review". Retrieved 2010-08-05.
  6. ^ "Orbiter Technical Notes: Dynamic State Vector Propagation", Martin Schweiger, 2006
  7. ^ P. Bretagnon and G. Francou, "Planetary theories in rectangular and spherical variables. VSOP87 solutions" (PDF 840KB), Astronomy & Astrophysics 202 (1988) 309–315.
  8. ^ "Orbiter Sound homepage". Retrieved 2008-06-28.
  9. ^ "ESA ACRV on Astronautix.com". Retrieved 2008-04-05.
  10. ^ "Project Apollo - NASSP". Retrieved 2007-12-21.
  11. ^ "AMSO - Apollo Mission Simulator for Orbiter". Retrieved 2007-12-21.
  12. ^ "Deltaglider IV from Dan's Orbiter Page". Retrieved 2008-06-28.
  13. ^ Doug's Orbiter Page--XR Series of Vessels
  14. ^ "Sourceforge.net:Meadville Space Center (Orbiter Add-ons)". Retrieved 2008-06-28.
  15. ^ "Ariane 5/ATV v2.0@Orbithangar.com". Retrieved 2008-06-28.
  16. ^ "Shuttle Fleet V4.0.1@Orbithangar.com". Retrieved 2008-06-28.
  17. ^ "BURAN2@Orbithangar.com". Retrieved 2008-06-28.
  18. ^ "World of 2001". Retrieved 2008-07-28.
  19. ^ "Project Orion@Orbithangar.com". Retrieved 2008-06-28.
  20. ^ "Super Millennium Falcon@Orbithangar.com". Retrieved 2008-06-28.
  21. ^ "Forum of the Ragtag fleet project". Retrieved 2008-06-28.

References

Manuals and Technical Papers

Reviews

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