La Crosse Technology WS-9037U-IT Outdoor Temperature, Atomic Time Wwvb Radio Controlled Time

Models: WS-9037U-IT

1 149
Download 149 pages 29.54 Kb
Page 43
Image 43

Section 3 - OUTDOOR TEMPERATURE

Display current outdoor temp

Display daily maximum and minimum outdoor temperature

ATOMIC TIME - WWVB RADIO CONTROLLED TIME

The NIST (National Institute of Standards and Technology—Time and Frequency Division) WWVB radio station is located in Ft. Collins, Colorado, and transmits the exact time signal continuously throughout the United States at 60 kHz. The signal can be received up to 2,000 miles away through the internal antenna in the Temperature Station. However, due to the nature of the Earth’s Ionosphere, reception is very limited during daylight hours. The wireless weather station will search for a signal every night when reception is best.

The WWVB radio station receives the time data from the NIST Atomic clock in Boulder, Colorado. A team of atomic physicists is continually measuring every second, of every day, to an accuracy of ten billionths of a second per day. These physicists have created an international standard, measuring a second as 9,192,631,770 vibrations of a Cesium-133 atom in a vacuum. For more detail, visit http://www.boulder.nist.gov/timefreq.htm. To listen to the NIST time, call (303)499-7111. This number will connect you to an automated time, announced at the top of the minute in “Coordinated Universal Time”, which is also known as Greenwich Mean Time (GMT). This time does not follow Daylight Saving Time changes. After the top of the minute, a tone will sound for every second. It is possible that your

16

Page 43
Image 43
La Crosse Technology WS-9037U-IT manual Outdoor Temperature, Atomic Time Wwvb Radio Controlled Time