There have recently been widespread attacks by internet gamers on Network Time (NTP) servers - many computers, servers, and devices run these, and some GNSS receivers have proven to be vulnerable. See this article for a good description of the issue:... Read More

At 23:59:42 UTC on 4/6/2019 (Midnight GPS time, which differs by 18 leap-seconds from UTC) , the 10-bit GPS Week Number broadcast by the constellation reset to zero for the second time since the beginning of GPS on 1/6/1980.  The official... Read More