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                       Welcome to a new reality
          that is a model of the system of natural satellites.
   Choose from the menu (   ) a planet of your interest and press Enter.
The model includes all natural satellites known to January 1995 except Moon.
     The planet motion model is founded on either the ephemeris DE200 or
the Keplerian orbit by P.Bretagnon. If the ephemeris DE200 is in use the "DE"
indicator appears on the screen.
    Saturn is presented with its ring system. Since a part of the rings is
faintly visible the only the rings A and B are designated by its inner and
outer boundaries. A space between them is the Kassini section.
    The time scale TDT is used in the model. That is the ephemeris time
transfer.
    The adopted coordinate system is equatorial one of the epoch J2000.
Really it is the dynamical system attached to the DE200/LE200 ephemeris
but it may be possibly transformed to the given epoch of the mean equator
and equinox at your choice.

                 Press  Esc  to  quit this media.

19
  A set of satellites

                   Why have you to choose satellites ?
   The matter is that in each given case you are interested in the certain
set of the satellites. Other satellites can make some hindrance. For example,
that is the case of mutual phenomena of main saturnian satellites. The faint
satellites moving among the others can make phenomena that can not be measured
from the Earth.

 - Please, delete unneeded satellites. Choose a satellite to be deleted and
press  Enter. This satellite will disappear from the list at the right.
This is a list of the included satellites. Alternative pressing of the Enter
key will include or exclude the satellite.

     After you are thorough with the satellite choosing, please, press
the  End  key or do the corespondent item of the menu.

                 Press  Esc  to  quit this media.

22
 Main menu - main window
    At the top you see the moment of the satellite positions.
 --------------------------------------
 Right One step forw - Calc.and show the satell.positions for the next moment
 Left  One step back - Calc.and show the satell.positions for the prev.moment
  +    Step increase - To increase time step
  -    Step decrease - To decrease time step
  w    Window adjust - Go to the window control menu to adjust the view
  c    Get event ... - Go to the additional menu to get the moments from table
  s    Spoor on/off  - Switch on or off spoor after satellites
  a    Satell.names  - Put on the screen the names of satellites and move them
  u    Seeing condit - Show the seeing condition for all observatories
  e    Moment input  - Input manually any given time moment for sat.positions
  p    Print window  - Print window with matrix 9-pin-printer
  n    Numeric value - Show the numerical values of satellite coordinates
  v    Planet scheme - Show the scheme of the Sun, the Earth and the planet
  f    Event setup.. - Go to the menu to control the event detection process
 ESC   Exit          - To select a new set of the satellites or to exit
----------------------------------------------------------------------------
    At the left bottom you see              │ At the right bottom - the local
the pointer of the window angular dimension │ coordinates of the window center
and the linear one at the planet region.    │ in the reference frame of date
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4 - Adjustment of the view of the satellite system
  p   Fix view p-t - Fix the view direction at the current state
  s   W. to left   - Turn window to the left  ┐The angular coordinates of the
  d   W. to right  - Turn window to the right │window center relative to the
  e   Window  up   - Turn window up           │planet are shown at the
  x   Window down  - Turn window down         ┘special window "Center"
  i   Scale ...    - Input the dimension of the field of view - window
  +   Scale fine   - Scale change - to fine view (zoom)
  -   Scale large  - Scale change - to large field
  v   Earth/Sun v. - Changing the point of view: Earth/Sun
  o   Orientation  - View orientation change (four variants)
  r   Relative...  - Choosing the body to the center of view
 Esc  Exit         - Return to the main menu
 ----------------------------------------------------------------
    The orientation of the view is designated by N(north), W(west), ... .
    Attention! Intersection of the body disks is always shown in black.
    To restore the view direction after the fixation do the item Fix view p-t
again. The item  "Earth/Sun v." makes alternatively too.
    The window looks as a telescope view field. You can turn your telescope
to the left (s-key) or to the right (d-key), up (e-key) or down (x-key).
You can increase (+-key) or decrease (--key) magnification of your telescope.
    Left bottom - coordinates in the frame indicated at the right top.
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 5 - Satellite name pointers
   Now you have a pointer with the name of the first satellite placed
on the window and new menu:
 ------------------
    s   N.to left   - Move the current name to the left
    d   N.to right  - Move the current name to the right
    e   N. up       - Move the current name up
    x   N. down     - Move the current name down
    f   Place       - Pull up the names at its places
 PgDn   Next        - Show the next satellite name
  Esc   Exit        - Return to the main menu
 -------------------------------------------------------
    After switch-on "Place" item each current name may be moved up to call
a new name. If you switch on "Place" the placed names remain on the window
up to the main menu return. Then you can print this window image with
satellite names.
    To delete names from the window use "clear window" item at the
Add.menu... item submenu.

10
   6    Sun - Earth - planet mutual positions scheme

    You see disposition of the Sun, the Earth and the planet. It is a graphic
scheme comprehensive without any comments. At the center of the scheme
the Sun is well located. The circles designate the Earth and planet orbits.
The table at the left presents the geocentric longitudes of the Sun and
the planet and the difference between of them.
    Two item of the menu allows to print the scheme on a matrix 9-pin printer
and to quit the scheme (return to the main menu).

18
   7   Seeing conditions table for all observatories
    ┌─────────────────────────────────────────────────────────────┐
    │    Attention !  No exit from this menu but pressing Enter   │
    └─────────────────────────────────────────────────────────────┘
    Now you have a Seeing condition table on the screen.
It is a menu simultaneously. Each line represents some observatory.
You may choose an observatory of your interest then press Enter.
Seeing condition for the selected observatory will remain at the
bottom of the main window. If you want delete this information from the main
window take the item " Switch off the data line on the window"
in the Seeing condition menu then press Enter.

    In the colons "Planet", "Sun", "Moon  the angular altitudes over the
local horizon are given (for the Sun the value is negative).

    You may print this table. To do this press Enter at the
" P r i n t  these data " item.

21
   8 - Numeric values of the satellite coordinates and some other data
   You have a table with values of the satellites coordinates and a special
menu to control these data. Originally the program shows the angular
coordinates of the satellites relative to the planet center. Additionally
it shows the apparent magnitudes of each satellite and some other details.
    You may select a body (satellite or planet) relative to that the program
shows the coordinates (not the view). To do this enter the "rel.to..." item.
There will be a menu to select the body.
    If you choose the "Direct c." item the table will show the values of
the right ascension and declination of each satellite.
    Note! When Sun centered point of view is selected the item "Direct c."
is not valid.
    You may print the table. To do this press Enter at the " Print..." item.
    In the title of the table the following designation are used:
 dr.a."    - difference in the right ascension in arcsec
 dr.a.*cd" - difference in the right ascension multiplied on cos(declination)
 ddec"     - difference in the declination in arcsec
 sep"      - angular separation in arcsec
 pos       - position angle counted in degree from north direction to the East
 Mag       - apparent magnitude   │  Vis.      - apparent radius in arcsec
 Radius,km - radius in kilometer  │  Comm      - some comments
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 9 - This is menu to control the detection of the mutual events
    If the detector is off the first four items of this menu are empty.
Otherwise you have following full menu:
  s  Settings    - to adjust the detection conditions
  b   Type (E/O) - select the type of event to detect (Eclipse/Occultation)
  v  Event tabl  - show the brief table of the event presence
  f  Search      - search the beginning or ending of an event
  x   On/Off     - to switch on/off the event detector
 Esc  Exit       - to exit to the main menu
----------------------------------------------------------------------------
    We consider two types of the events: eclipse and Occultation.
The occultation consists in intersection of apparent from the Earth disks of
two body. These may be satellite and planet or two satellites. The borders of
the disks touch outside in the beginning and in the ending of the event.
The eclipse occurs when the satellite find itself in the shadow of the planet
or other satellite.
    One of two types is always selected. To replace the type select
"Event type" item. This item effects alternatively.
    Item  "Settings" invokes a submenu to adjust some parameters
controlling the event detection process.
    Item "Search" run the search process with the step prescribed before.
To interrupt this process press any key.
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  10 - Additional menu
   Additional menu is used to input automatically the time argument from the
table prepared in a special file. The name of this file is given for each
planet in the file  "mons-eph.cnf" and is chosen automatically. It may be the
output file with brief information about detected events after the events
searching if the only 14 position of the controlling string has 'y'.
   Now you have a submenu as following:
 ------------------
  b    Init.moment  - set the moment at the first line of the momtab.dat file
  n    Next moment  - go to the moment at the next line
  c    Clear wind.  - clear the window
  Esc To main menu  - go back to the main menu
 ------------------
    After pressing any item the function will be executed and the control will
be passed to the main menu automatically. If the file with the moments do not
exist the functions will be ignored.
5
   11 - The program exit warning
   If you confirm the exit by pressing the Esc key you are in the menu of
satellite choosing. Then you may exit to DOS.
   Exiting the program saves some parameters controlling the process.
Entering it restores these parameters.
9
   12 - Choose the satellite or the planet to the center of view
    ┌─────────────────────────────────────────────────────────────┐
    │    Attention !  No exit from this menu but pressing Enter   │
    └─────────────────────────────────────────────────────────────┘
    Choose the body to be fixed at the center of the field of view.
The position of this body will not be changed by time.
    Note, if a satellite is chosen to the center the planet will be
repaint by any changing of the time argument that can be a time consuming
process.
8
  13 - Choose the satellite or the planet
    ┌─────────────────────────────────────────────────────────────┐
    │    Attention !  No exit from this menu but pressing Enter   │
    └─────────────────────────────────────────────────────────────┘
    Choose the satellite or the planet relative to that the coordinates
are to be calculated.
    Differences between the coordinates will be calculated and shown
in the table.
6
  14 - Choosing the epoch of the coordinate system
  The used coordinate system is the dynamic system attached to the DE200/LE200
ephemeris. The system may be transformed to the given epoch of the mean
equator and equinox. This epoch may be selected from this menu. It remains
the same up to the next choosing from this menu.
    Then the epoch will be shown at the right top of the main window.
8
  15 - Exit from event presence table

    You see the table that points by asterisks what bodies take part
in the mutual phenomena at the given moment. If no asterisk is in the table
it means that no mutual event occurs at the moment.
    At the moment the table shows only occultations or only eclipses
as it is chosen before.

22
 16 - Setting the parameters of the event detector
  You have the menu:
  s  Sound on/off  - switch on/off the sound while the beg./end event occurs
  d  Depth.on/off  - switch on/off the main screen placard depth indicator
  v  Stop on/off   - switch on/off stopping while the beg./end event occurs
  r  Min.radii     - get input of the artificial apparent radius Mr
  m  Radius factor - get input of the radius increasing factor Rf
  p  Planet on/off - include/exclude the detection of events with planet
 Esc Exit          - return to the events menu
 -------------------------------------------------
      Note that we assume the following condition to hold an event:
    d <= max{  (R1+ R2) * Rf  ,  2 * Mr } ,
where  d  is apparent angular distance between the centers of the satellites
or between the centers of a satellite and the planet.
 R1 and R2 are the apparent angular radii of the bodies,
 Rf coefficients is radius increasing factor, Mr is artificial apparent radius
    For real events we must assume that  Rf=1 and Mr=0. Other values serves to
detect close apparent approaching the satellites one to another.
    The item "Planet on/off" serves to switch on or switch off the detection
of the phenomena with the planet.
    If depth indicator is on the combined magnitude of two satellites as well
as depth of the magnitude are shown on the main window.
15
 17 - Beginning or the end of the event is detected
    At the top of the screen a placard is appeared. It lists three body
that composes the phenomena.
    If the first body is the Earth then the second body occults the third one
    If the first body is the Sun then the second body puts the shadow on
the third one.
    The menu proposes three actions:
 a  Automat.output - output the data and continue the search automatically
                     non stop data output
 p  Output         - output the data and stop the search
Esc Ignore . . .   - proceed without output
--------------------------------------------
The name of output file is specified in the configuration file "mons-cnf.cnf".
Default is "events.dat". Set of data to be output is specified in the
configuration file too. For more information see the user's manual.
13
 18 - The time moment input manually

You want to get the ephemeris at some moment. Type the date and the moment.
   Date can be specified as calendar or as modified Julian date.
   Time can be input in hours, minutes, seconds or as a part of day.
   Up-down cursor movement can be got by the arrow keys (   ).
   After you are through with the typing press Enter key.
   Pressing the Esc key you return the previous value.
   The keys  Del, BackSpase are valid.

   Press F2 key to follow the computer clock. At first time you are asked
for the time zone correspondent to the computer clock.

18
 19 - The event detection parameters input

    You can type new values for the parameters Rf and Mr that specify
the condition of the phenomena presence.
    The program assumes the following condition to hold an event:
    d <= max{  (R1+ R2) * Rf  ,  2 * Mr } ,
where  d  is apparent angular distance between the centers of the satellites
or between the centers of a satellite and the planet.
 R1 and R2 are the apparent angular radii of the bodies,
 Rf coefficients is radius increasing factor, Mr is artificial apparent radius
    For real events we must assume that  Rf=1 and Mr=0. Other values of Rf and
Mr serves to detect a close apparent approaching the satellites one to another
    For occultations all the parameters are assumed as the satellites are seen
from the Earth and for eclipses the same thing but from the Sun.
   Up-down cursor movement get by the arrow keys (   ).
   After you are through with the typing press Enter key.
   Pressing the Esc key you return the previous value.
   The keys  Del, BackSpase are valid.
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 20 - Your printer is absent or turned off or out of paper

     Program performs printing on any of 9-pin-matrix printers or
                   text data on any laser printer.
    Graphic image of the window can be printed on laser printer if
           only it is possible through the PostScript format.
    The data prepared to be printed can be output to a special file.
         See the "Settings" item in the menu "Planet select".

    Attention !  The writing to the file get in the append mode. That is
the data will be accumulated in the file. Please, survey these data and
delete the unneeded parts of them.
.                                                                            .
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21 - Input the precise dimension of the field of view - window

 To set the typed value press Enter.

 To release the dimension setting press Esc key and the dimension will
 be unchanged.

 The keys     switch  the units of the dimension.

 Relation between the units is defined by the range between
 the point of view (the Earth or the Sun) and the planet.

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22 - File select for output the data which are in text mode.

 List of the file names is proposed. You see one of them on the right side.
 You may scroll the items  by the keys <- and ->.

 To take the selected name do the corespondent item of menu.

 The output is doing by the print command of the menu while the dialog.

 All the data are writing in append mode. That is they are accumulating
 in the file. Please, be careful to save the disk memory and delete
 the unnecessary data. Do it by the DOS or Windows commands.

 While the field of view print command is running only some comments
 is writing to the here selected file. The graphic image will
 be printed or written anyway (see special help).

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23 - File select for graphic image of the window in PostScript format.

 List of the file names is proposed. You see one of them on the right side.
 You may scroll the items  by the keys <- and ->.

 To take the selected name do the corespondent item of menu.
 Press Esc key to release the image output.

 If you are selected existing file the data will be overwritten.

 Please, be careful to save the disk memory and delete
 the unnecessary data. Do it by the DOS or Windows commands.

 Comments on the image will output as text data to the printer
 or to a special file (see helps on "Settings" item of the menu
 "Planet select")

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24 - Select, what is to be set up.

 Printer features - choosing the way to output the graphic data.
                 It may be 9-pin matrix printer or any laser printer.
                 Some of them can print in PostScript format.
                 Other do not understand it.

 Print/file output - this is to select the way of the text data output
                 by the print command while dialogue. The output may be
                 to a special file or to the printer.
 Events output... - set on/off the output the separate data while
                 detecting the events (occultations or eclipses).

16
25 - Choosing the way of the graphic image output

 Matrix 9-pin printer - graphic output directly to the printer
                in the 9-pin printer graphic mode.

 Any. Graphics to PostScript-file - the graphic image will be always
                written to the special file in PostScript format.
                The program will ask you the name of this file before
                output.

 Any. Print on PostScript printer - the graphic image will be directly
                printed through the PostScript format or
                written to the special file in PostScript format.
                It depends on the output mode setting (see preceding
                menu help).

7
26 - Select the way to output the data which are in text mode.

 Immediately to Printer - all the data will be printed immediately
                by the print command while dialogue.

 To file: - the data will be written to a special file in append mode.

13
27 - Switch on/off the output of the saparate data while events detecting 

    While detecting the events the command "Output" ("Automat.Output") 
is available to get the data about occultations and eclipses 
on printer or in a file. 
    Here you may set on/off the output for specified data.
    You see on the right the yellow asterisks these mark the data
switched "on" to the output. 
    Choose the data type and press Enter. The mark will be appear or
disappear alternatively.
    After you are through with this choosing press Esc or press
the last item of the menu to return.

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end