AAE 450 Spring 2008

Kyle Donahue1/24/2008

Trajectory Analyst, CADWeather and Wind Model

AAE 450 Spring 2008

Wind Model

Trajectory Optimization

Based on wind profile provided by B. A. Appleby

Assumptions:• Linear Constant wind• Random Gusts• Impulse Wind Gust• Wind is 2-D

AAE 450 Spring 2008

Force of the Wind

Trajectory Optimization

Future Work:• Converting force of wind into drag• Weather cocking

AAE 450 Spring 2008

Backup Slides – References Appleby B. A., T. E. Reed, “Dynamic Stability of Space Vehicles” General

Dynamics Corporation, San Diego, CA, Nov. 1967. http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19680001621_1968001621.pdf

Fleming, Eric L., Sushil Chandra, Mark R. Shoeberl, John J. Barnett, “Monthly Mean Global Climatology of Temperature, Wind, Geopotential Height, and Pressure for 0-120 km”, NASA Technical Memorandum 100697, NASA, Feb. 1988 http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19880013119_1988013119.pdf

Panel on Meteorological support for Space Operations Board, “Meteorological Support for Space Operations: Review and Recommendations”, National Academy Press, Washington, D.C. 1988

Trajectory Optimization

AAE 450 Spring 2008

Backup Slides – Gust and Force

Trajectory Optimization

AAE 450 Spring 2008

Backup Slides – Gust and Height

Trajectory Optimization

Number Gusts = 19 Wind Direction -31.12 deg SoutheastGust Direction 54.82 deg Northeast

Altitude of Gusts (m) Velocity of Gusts (m/s)1 357 5.633

2 2276 6.814

3 4865 4.045

4 4969 6.342

5 5898 4.1

6 6869 1.006

7 7889 7.224

8 9336 9.531

9 10550 5.679

10 11413 9.045

11 13516 8.978

12 15924 0.647

13 17065 1.559

14 17558 9.97

15 18481 3.013

16 20676 7.849

17 22716 3.43

18 27516 6.597

19 28020 9.35