<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><meta http-equiv="Content-Type" content="text/html; charset=us-ascii" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class="">Dear Colleagues,</div><div class=""><br class=""></div><div class="">In approximately 10 days time the GPS constellation will experience a time-accounting incident that has potential to severely disrupt operations of receivers and systems if not properly prepared for. All operators of GNSS receivers and IGS and other CORS stations are encouraged consult our Knowledge Base article for detailed information regarding actions required for certain receiver types, and general information of interest for scientists and students:</div><div class=""><br class=""></div><div class=""><a href="https://kb.unavco.org/kb/article/preparing-gps-gnss-receivers-and-hardware-for-the-april-6-2019-gps-week-number-rollover-wnro-867.html" class="">https://kb.unavco.org/kb/article/preparing-gps-gnss-receivers-and-hardware-for-the-april-6-2019-gps-week-number-rollover-wnro-867.html</a></div><div class=""><br class=""></div><div class="">WIth best wishes for an uneventful and Happy Rollover!</div><div class="">Freddy Blume</div><div class=""><br class=""></div><div class="">
<div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">====================<br class="">Dr. Frederick Blume<br class="">Sr. Project Manager<br class="">UNAVCO<br class="">6350 Nautilus Dr.<br class="">Boulder, CO 80301-5553<br class="">(303)579-9952<br class=""><a href="http://www.unavco.org/" class="">http://www.unavco.org</a><br class="">====================</div>
</div>
<br class=""></div></body></html>