(PhysOrg.com) -- A federal watchdog agency has warned the U.S. Congress that the GPS system could start failing in 2010 and beyond. Due to delays in launching replacement satellites and other circumstances, the GPS systems ...
The practice of keeping time hinges on stable oscillations. In a grandfather clock, the length of a second is marked by a single swing of the pendulum. In a digital watch, the vibrations of a quartz crystal mark much smaller ...
Optics & Photonics
Nov 30, 2023
1
38
New hazard-monitoring technology uses GPS signals to go wave-hunting in the Pacific Ring of Fire. GUARDIAN's long-term objective is to augment early warning systems.
Earth Sciences
May 31, 2023
0
94
Don't let the titanium metal walls or the sapphire windows fool you. It's what's on the inside of this small, curious device that could someday kick off a new era of navigation.
Quantum Physics
Oct 26, 2021
2
2879
The land masses of Japan shifted from east to west to east again in the months before the strongest earthquake in the country's recorded history, a 2011 magnitude-9 earthquake that killed more than 15,500 people, new research ...
Earth Sciences
Apr 29, 2020
0
164
Sheep appear to forage and avoid parasites differently depending on how healthy they are, according to new University of Bristol research published in Proceedings of the Royal Society B. The study, which used remote GPS sensing ...
Plants & Animals
Feb 6, 2020
1
300
No one has a firm grasp on the dimensions and activity of the lowest part of our upper atmosphere, known as the ionospheric D region, because it's literally a moving target. Located 40 to 60 miles above the Earth's surface, ...
Earth Sciences
Apr 5, 2019
0
160
In 1998 former tech consultant Hank Eskin launched a campaign to track dollar bills. Through the "Where's George?" initiative, dollars were stamped with messages about the currency tracking project, and people were instructed ...
General Physics
Mar 29, 2019
0
936
Japan successfully launched a satellite Thursday as part of a broader effort to build a homegrown geolocation system that boosts the accuracy of car navigation systems and smartphone maps to mere centimetres.
Space Exploration
Jun 1, 2017
2
271
Satellite engineers have been puzzling over why GPS navigation systems on low-orbiting satellites like ESA's Swarm sometimes black out when they fly over the equator between Africa and South America. Thanks to Swarm, it appears ...
Space Exploration
Oct 31, 2016
5
83
