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- DANCE 2.3 ON-LINE HELP 3-11-91
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- CONTENTS:
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- 1. Control Bar Options
- 2. Using Find to Locate Things
- 3. The Main Menus
- 4. The Utility Menus
- 5. The Access Menu
- 6. Configuration Guide
- 7. Viewing the Earth Up Close
- 8. Pointers for Accurate Orbital Simulations
- 9. Printing the graphics screen
- 10. Constellation Abbreviations- press [End]
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- Use Page Up/Down, Home and End to move through the Help file. Hold up/dn
- cursor keys down to move by lines. Press ESC key to return to Dance.
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- 1. CONTROL BAR OPTIONS
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- Date -Enter date to begin simulation. Year period from -999 to 9999.
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- Renew -Erase/refresh the screen.
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- Skylns -Toggle on/off all screen lines (orbits, constellations, grids);
- continuously variable using mouse or shift (VGA only).
- Pace -Vary simulation speed/step size. Too fast may compromise accuracy.
- `true' is the slowest setting, is the true pace of time.
- Zoom -View magnification from space or Earth. Object-dependent from Earth.
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- (Ins) -Use Insert key to toggle 1°/ 5° change increments. Highlighted for 1°.
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- View -View point coordinates, direction towards which you are viewing.
- Ecliptic latitude, longitude from space; declin and rt asc in sky.
- (Loc) -ScrollLock locks screen to View/Zoom changes. Highlighted when locked.
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- Access -Access to simulation data/control and database files.
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- Find -Puts specified objects/horizon on screen. See FIND below for details.
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- Invert -Allows inversion of planets for telescope view. Arrow points north.
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- Label -Temporarily labels objects of all kinds for identification.
- Star, constellation, and DSO labels are orbit color, so use skylns.
- Menu -Main menu for more operating options. Context sensitive to the
- current simulation mode. Provides utility menu with More options.
- Bar -Toggles control bar on/off; varies continuously just as Skylns (VGA).
- ESC -Escape key generally allows backing out of current activity.
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- 2. USING FIND TO LOCATE THINGS
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- Find (object) puts the specified object at the find center. Include `fix' to
- lock on planet, sun, moon. THREE LETTERS are sufficient for most things.
- Find (FIX) (PLANET, SUN, MOON)- include fix to lock screen on body.
- Find (CONSTELLATION)- use 3-letter abrev. which are listed at end of HELP.
- Find (ASTERIOD or COMET)- use current label (i.e. Halley or 1986II).
- Find (STAR NAME)- finds any of the 50 stars whose names appear on the screen.
- Find (DSO)- use the 3-character labels used in the DSO files. DSOs must be on.
- Find (CD) HORIZON- cardinal directions are: north,ne,east,se,south,sw,west,nw.
- examples: Find east hor- see what's rising; Find sw hor- see Venus setting.
- Find ZENITH- points the screen straight up for the current site and instant.
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- (Note: horizons and zenith are `of the instant', so simulation is paused.)
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- 3. MAIN MENU OPTIONS (sm=space mode, pm=planet mode, em=earth sky mode)
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- Target&Lock -Provides box cursor to target and lock-on planets, sun, moon.
- (Find and Planets menu are generally preferred for this.)
- Tracking Off -Disengage from object tracking. (from pm)
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- Constel Draw -Toggle for drawing constellations.
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- Celest Grid -Draws celestial grid centered on Earth (sm) or in Earth's sky.
- The ecliptic (path the Sun follows) is also shown (from em).
- Planet Grid -Draws celestial (orientation) grid for tracked planet. (pm)
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- Earth's Sky -Change to ground based viewpoint. Observer's latitude and
- longitude is as specified in Access Configure. (from sm)
- Space View -Return to space from Earth. (from em)
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- Asteroid Plot-Plot the asteroids (not with sampler)
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- Planets -Select/track on any planet. Close-up of Earth available from
- special vantage point (see 7. Viewing Earth Up Close-below)
- DS Objects -Select classes of deep space objects for viewing.
- (only Messier in sampler)
- More Options -Mode-sensitive utility menu with additional options.
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- Help -To access this operation guide.
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- eXit Dance -Exit the program, save the current simulation in Resume.
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- 4. UTILITY MENU OPTIONS
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- Resume -Resume simulations by entering file name. The default file
- `Resume' is automatically saved using eXit Dance.
- Save Status -Saves current simulation. (not in sampler)
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- Time Tics -Places interval marks on the traces of orbiting objects.
- Enter interval in days. Enter date with which to begin.
- Turn off by entering 0. Orbit color, so use Skylns.
- Draw Orbits -Toggle on/off orbit drawing for asteroids/comets. The path is
- still traced. Planet orbits are unaffected.
- Move Center -Move primary object (sun, or planet in pm) on the screen.
- Select, move cursor, and click. Pressing `C' when active will
- place at center of screen.
- Move Find Pos-Like Move center, but for convenient Find location in sky.
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- Print Labels -Type temporary screen labels, notes for printing with screen.
- Select, type label, click, move T to desired location, click.
- Esc when done. Erase mistakes by moving T to left with BkSp.
- Site Coords -Specify the viewing location on Earth. Enter in indicated format,
- include comma. West longitudes and south latitudes are negative.
- 3-D Orbits -Toggle for red/blue stereo orbit images. Use specs.
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- Apparent Dist-Use with 3-D to change apparent distance for good effect.
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- Cloud Cover -Toggle Earth's clouds on/off when observing up close.
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- 5. ACCESS MENU OPTIONS
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- Return -Use to return to the simulator. Esc will also do it.
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- Satellites -Appears when tracking a planet. Displays satellite information to
- compare, deactivate satellites, select and goto another system.
- Object Status-Access to asteroid/comet information and selection screen.
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- Resume Files -List resume files to select, edit, add descriptive header, etc.
- Comet Files -List comet files for selection (not in sampler)
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- Asteroid Files-List asteroid files for selection (not in sampler)
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- Deep Sky Objs-DSO files by object type (not in sampler)
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- Planet On/Off-Deactivate irrelevant planets to speed up simulations. Toggle
- with Enter. Use ESC to return to this menu.
- Julian Calc -Use to convert dates between the Julian day and calendar date,
- either direction. Julian day must be greater than 10000.
- Configure -put configuration option in file box for inspection/modification.
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- 6. CONFIGURATION GUIDE
- (not present in sampler)
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- 7. VIEWING THE EARTH UP CLOSE
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- Close views of the rotating Earth can be seen from the `Apollo' vantage
- point; 250,000 km (about 150,000 miles) from Earth. To go there:
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- 1) if viewing the solar system from space, select `3 Earth' from the Planets
- menu, and then `Earth View' from the main menu.
- 2) if viewing from Earth (sky view), select `3 Earth' from the Planets menu.
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- You can zoom to 2X on the Earth. You can get a cloudless view by toggling
- Cloud Cover off (More Options menu). You can return to where you came from
- (far space or sky view) by pressing ESC. You can select the alternate
- vantage point (Earth's sky or Space view) from the main menu.
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- 8,9 (not present in sampler)
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- 10. CONSTELLATION ABBREVIATIONS
- And Andromeda Cir Circinus Lac Lacerta PsA Piscis Austrinus
- Ant Antlia Col Columba Leo Leo Pup Puppis
- Aps Apus Com Coma Berenices LMi Leo Minor Pyx Pyxis
- Aqr Aquarius CrA Corona Australis Lep Lepus Ret Reticulum
- Aql Aquila CrB Corona Borealis Lib Libra Sge Sagitta
- Ara Ara Crv Corvus Lup Lupus Sgr Sagittarius
- Ari Aries Crt Crater Lyn Lynx Sco Scorpius
- Aur Auriga Cru Crux Lyr Lyra Scl Sculptor
- Boo Boötes Cyg Cygnus Men Mensa Sct Scutum
- Cae Caelum Del Delphinus Mic Microscopium Ser Serpens
- Cam Camelopardalis Dor Dorado Mon Monoceros Sex Sextans
- Cnc Cancer Dra Draco Mus Musca Tau Taurus
- CVn Canes Venatici Equ Equuleus Nor Norma Tel Telescopium
- CMa Canis Major Eri Eridanus Oct Octans Tri Triangulum
- CMi Canis Minor For Fornax Oph Ophiuchus TrA Triang. Australe
- Cap Capricornus Gem Gemini Ori Orion Tuc Tucana
- Car Carina Gru Grus Pav Pavo UMa Ursa Major
- Cas Cassiopeia Her Hercules Peg Pegasus UMi Ursa Minor
- Cen Centaurus Hor Horologium Per Perseus Vel Vela
- Cep Cepheus Hya Hydra Phe Phoenix Vir Virgo
- Cet Cetus Hyi Hydrus Pic Pictor Vol Volans
- Cha Chamaeleon Ind Indus Psc Pisces Vul Vulpecula