- Obtain the GPS groundspeeds on headings of north, east, and south and
call them
**V**,_{1}**V**, and_{2}**V**, respectively._{3} - Square the groundspeeds to obtain
**V**,_{1}^{2}**V**, and_{2}^{2}**V**._{3}^{2} - Add
**V**to_{1}^{2}**V**and call the result_{3}^{2}**P**. - Subtract
**V**from_{3}^{2}**V**and call the result_{2}^{2}**Q**. - Subtract
**V**from_{3}^{2}**V**and call the result_{1}^{2}**R**. - Enter the values for
**P**,**Q**, and**R**into the final equation,**#12**. - Solve the quadratic equation
**#12**for**V**using the quadratic formula. Take the square root of the result to determine_{A}^{2}**V**, the aircraft true airspeed._{A}

For the address of the webmaster, look at the first few comments of a Java file. To obtain all Java files, download the True Airspeed Calculator ZIP file. The True Airspeed Calculator ZIP file is available on the Distribution Policy page. Copyright 2001 REA Computing, Inc. |