On February 14, 1989, the first Global Positioning System (GPS) “Block II” satellite was launched into Earth’s orbit. To ensure global coverage, 23 additional satellites were launched over the following years at various altitudes and orbits. Thus, a new era of Land Surveying was born, although it would be several more years before it would become mainstream in the industry.
Originally developed by the U. S. Department of Defense, the new GPS system would eventually become a normal part of everyday life. You can find out more about Block II satellites here.
In more recent GPS news, the first Block III satellite was launched into orbit on December 28, 2018. However, it won’t arrive in its final location for at least a few years, due to various delays and cost overruns. The remainder of the 10 Block IIIA satellites aren’t scheduled to be completed until 2023. For more information, follow this link.