CCC-0118 SIGMA/B.
SIGMA/B, Doses in Space Vehicle for Multiple Trajectories, Various Radiation Source
NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROBLEM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES
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| Program name | Package id | Status | Status date |
|---|---|---|---|
| SIGMA/B | CCC-0118/01 | Tested | 01-OCT-1977 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| CCC-0118/01 | IBM 370 series | IBM 370 series |
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3. DESCRIPTION OF PROBLEM OR FUNCTION
SIGMA/B calculates radiation dose at arbitrary points inside a space vehicle, taking into account vehicle geometry, heterogeneous placement of equipment and stores, vehicle materials, time-weighted astronaut positions and many radi- ation sources from mission trajectories, e.g. geomagnetically trap- ped protons and electrons, solar flare particles, galactic cosmic rays and their secondary radiations. The vehicle geometry, equip- ment and supplies, and man models are described by quadric surfaces. The irradiating flux field may be anisotropic.
The code can be used to perform simultaneous dose calculations for multiple vehicle trajectories, each involving several radiation sources. Results are presented either as dose as a function of shield thickness, or the dose received through designated outer sections of the vehicle.
SIGMA/B calculates radiation dose at arbitrary points inside a space vehicle, taking into account vehicle geometry, heterogeneous placement of equipment and stores, vehicle materials, time-weighted astronaut positions and many radi- ation sources from mission trajectories, e.g. geomagnetically trap- ped protons and electrons, solar flare particles, galactic cosmic rays and their secondary radiations. The vehicle geometry, equip- ment and supplies, and man models are described by quadric surfaces. The irradiating flux field may be anisotropic.
The code can be used to perform simultaneous dose calculations for multiple vehicle trajectories, each involving several radiation sources. Results are presented either as dose as a function of shield thickness, or the dose received through designated outer sections of the vehicle.
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4. METHOD OF SOLUTION
Automatic sectoring of the vehicle is perform- ed by a Simpson's rule integration over angle; the dose is computed by a numerical angular integration of the dose attenuation kernels about the dose points. The kernels are curve-fit functions construc- ted from input data tables.
Automatic sectoring of the vehicle is perform- ed by a Simpson's rule integration over angle; the dose is computed by a numerical angular integration of the dose attenuation kernels about the dose points. The kernels are curve-fit functions construc- ted from input data tables.
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10. REFERENCES
- T.M. Jordan:
SIGMA, A Computer Program for Space Radiation Dose Analysis Within Complex Configurations
McDonnell Douglas Report DAC-60878 (November 1967).
- W.R. Yucker:
Extended Capabilities of the SIGMA Program
McDonnell Douglas Memorandum A3-830-BBFO-121
(June 1971, revised May 1974).
- T.M. Jordan:
SIGMA, A Computer Program for Space Radiation Dose Analysis Within Complex Configurations
McDonnell Douglas Report DAC-60878 (November 1967).
- W.R. Yucker:
Extended Capabilities of the SIGMA Program
McDonnell Douglas Memorandum A3-830-BBFO-121
(June 1971, revised May 1974).
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CCC-0118/01
| File name | File description | Records |
|---|---|---|
| CCC0118_01.002 | SIGMA/B SOURCE - F4 EBCDIC | 1627 |
| CCC0118_01.003 | RANDM1 SUBROUTINE - F4 EBCDIC | 16 |
| CCC0118_01.004 | SIGMA/B JOB CONTROL | 4 |
| CCC0118_01.005 | SIGMA/B SAMPLE PROBLEM INPUT | 156 |
| CCC0118_01.006 | SIGMA/B SAMPLE PROBLEM OUTPUT | 1243 |
Keywords: doses, space radiation.