Translations:Adventist Youth Honors Answer Book/Recreation/Geocaching - Advanced (General Conference)/1/en
|Geocaching - Advanced (General Conference)|
| General Conference
|| Skill Level 2
Year of Introduction: 2005
Earning this honor meets a requirement for:
1. Have Basic Geocaching Honor
This Wiki has a page with instructions and tips for earning the Geocaching honor.
2. Briefly describe the origin of the global positioning satellites? What is their history – when and how did they get there? By whom?
The design of GPS is based partly on the similar ground-based radio navigation systems, such as LORAN and the Decca Navigator developed in the early 1940s, and used during World War II. Additional inspiration for the GPS system came when the Soviet Union launched the first Sputnik in 1957. A team of U.S. scientists led by Dr. Richard B. Kershner were monitoring Sputnik's radio transmissions. They discovered that, because of the Doppler effect, the frequency of the signal being transmitted by Sputnik was higher as the satellite approached, and lower as it continued away from them. They realized that since they knew their exact location on the globe, they could pinpoint where the satellite was along its orbit by measuring the Doppler distortion.