NOAA

June 25, 2014

Mercury Rising: When to Expect the Warmest Day of the Year

By Tracy Cozzens

Image of the sun on Tuesday, Jan. 7, 2014, from the Solar X-Ray Imager on NOAA's GOES satellite, taken just after the maximum emission of a solar flare. The eruption came from the middle of the sun and is directed toward Earth. This is the largest solar flare so far this year.

January 13, 2014

Blast from Sun Unsettles Earth’s Magnetic Field, but No Storming

By GPS World Staff

Photo: Hathaway/NASA/MSFC

October 30, 2013

The Halloween Storms: When Solar Events Spooked the Skies

By GPS World Staff

October 2, 2013

Seven Free Alternatives to OPUS GPS Post-Processing During U.S. Federal Government Shutdown

By Eric Gakstatter

January 30, 2013

Call for Participation: Round 2 of NGS Kinematic GPS Challenge

By GPS World Staff

July 11, 2012

NOAA Planning Changes to Space Weather Alerts

By GPS World Staff

May 9, 2011

Alabama Tornadoes: This Editor’s Personal Experience

By Art Kalinski

FIGURE 1. Overall concept of search and rescue system. (Image: Cospas-Sarsat)

January 1, 2011

Innovation: The Distress Alerting Satellite System

By Richard B. Langley

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