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- Program STSORBIT Space Shuttle Orbit Simulation Page 1
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- Program STSORBIT
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- Space Shuttle and Satellite Orbit Simulation
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- Version 9047
- November 18, 1990
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- by David H. Ransom, Jr.
- Rancho Palos Verdes, CA
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- BBS: (213) 541-7299
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- BRIEF PROGRAM INSTRUCTIONS
- --------------------------
-
- This file is intended to help the experienced user get started with
- program STSORBIT. It is NOT intended to be a substitute for the full
- program documentation!
- STSORBIT is a program to track the NASA Space Shuttle and other
- satellites. Orbital data may be entered manually for space shuttle missions
- and NASA/NORAD 2-line elements may be used for all satellites as well as
- for the space shuttle when available.
- The following steps should get the program "up and running" with as
- little fuss and bother as practical.
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- 1. For hard disk users: Copy all files to a subdirectory called STSORBIT.
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- For floppy disk users: Copy all files to a separate floppy disk.
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- 2. For hard disk users: Log into the STSORBIT subdirectory using the
- following commands (which assume drive C:):
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- C:
- CD \STSORBIT
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- For floppy disk users: Log into the floppy disk (drive A: assumed):
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- A:
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- 3. If you have used a previous version of STSORBIT, delete the file
- STSORBIT.INI. The format of the .INI file has changed in this version.
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-
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- 4. Enter the following command to start the program:
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- STSORBIT (for all CGA/EGA/VGA color systems)
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-
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- Program STSORBIT Space Shuttle Orbit Simulation Page 2
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- STSORBIT /M (for all monochrome systems)
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- 5. The program should start and load its map data. Then a screen will
- appear which requests that you set the UTC Offset for your time zone.
- Follow the on-screen instructions and enter the UTC Offset and the
- Daylight Flag.
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- 6. The STSORBIT Main Menu will now appear. Press F1 for a demonstration
- of the program. Press ENTER to stop the demonstration and return to
- the Main Menu.
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- 7. The distribution package includes a set of NASA 2-line elements with a
- name like NASA769.TXT. This contains orbital information on over 100
- different satellites. Press F2 to load orbital information. The screen
- will display a list of files having the extension .TXT. The
- NASAnnn.TXT file should be one of them. Enter the file name at the
- prompt and press ENTER.
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- 8. The program will ask what satellite you wish to view with a default
- response of "HST" (meaning the Hubble Space Telescope). Press ENTER to
- accept the default or enter another satellite name (such as "MIR" or
- "TDRS"). If the name of the data file begins with the letters "STS",
- the default satellite name will be "STS".
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- 9. The program will search the data file for the requested satellite and
- display its orbital data if found. If this is the satellite you wish,
- press ENTER when asked.
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- 10. STSORBIT will now display a map of the world and the ground track of
- the satellite. The satellite itself will be a white symbol along the
- ground track. EGA and VGA systems will display in color; CGA and HGC
- systems will display in monochrome.
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- 11. Press ENTER at any time to return to the Main Menu.
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- 12. To display a space shuttle mission, press F4 to enter orbital
- information in STSORBIT's simple orbital model. Enter the launch time
- and date in local time (or use UTC by adding "U" at the end of the
- time entry). If you know the orbital altitude and inclination, enter
- that information; otherwise, press ENTER to accept the default data.
- More accurate NASA 2-line elements are usually available within 24
- hours of a space shuttle launch.
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- 13. STSORBIT has many features which are fully described in the program
- documentation. Please read that documentation!
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- 14. The latest version of STSORBIT and current NASA 2-line elements are
- always available on my bulletin board system: RPV ASTRONOMY BBS at
- (213) 541-7299, 2400/1200 baud, 8-N-1. The system has a power
- controller; if it hasn't answered after the THIRD RING, hang up and
- call back in two minutes. This is a free access BBS with 100MB of
-
-
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- files and is often busy, so please be patient.
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- Program STSORBIT Space Shuttle Orbit Simulation Page 3
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- USING MISSION ELAPSED TIME WITH 2-LINE ELEMENTS
- -----------------------------------------------
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- The standard NASA/NORAD 2-line orbital element format does not include
- the launch time or launch date. However, this information is obviously
- required if Mission Elapsed Time (MET) is to be displayed. That information
- must therefore be obtained independently and manually entered into the
- program. The following steps are required:
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- 1. Start program STSORBIT (see above).
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- 2. Now load the desired 2-line elements using Function Key F2 on the Main
- Menu.
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- 3. Press Function Key F5 to adjust the orbital information. Since you are
- using 2-line elements, the only questions asked will be Launch Time
- and Launch Date. Enter the appropriate information. Note that if you
- enter UTC or GMT Launch Time (by adding the letter "U" or "G" at the
- end of the time, upper or lower case), STSORBIT assumes that the date
- you enter will also be the UTC Launch Date.
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- 4. The information will be displayed for approval. Press ENTER to accept
- the data, or press SPACE BAR to repeat the process.
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- 5. Once the data have been accepted, press Function Key F6 to display
- Mission Elapsed Time. Press F6 again to return to Time Elapsed Since
- Epoch. While the ground track is displayed, the letter "T" may be
- pressed to switch between the two elapsed time calculations. If a
- launch time and date have not been entered, these commands will have
- no effect.
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- The launch time and launch date will be saved in file STSORBIT.INI and
- need only be entered once. Note, however, that this information must be
- changed or cleared if you change satellites.
-
-
- David H. Ransom, Jr.
- 7130 Avenida Altisima
- Rancho Palos Verdes, CA 90274