Prime Meridian Day – 135 years

Prime Meridian Day – 135 years

Sir George Airy established a meridian at the Royal Greenwich Observatory in 1851 to serve as a common reference for astronomical observations and navigation. By 1884 two thirds of ships were using it as a reference on their charts. US President Chester A. Arthur...
GPS Threat Watch – Politico Space

GPS Threat Watch – Politico Space

Blog Editor’s Note: “Politico” is a well known and respected site for information about US national politics. This is the first we became aware of their weekly newsletter focusing on space issues.  We signed up to receive it when it is published...