Our thoughts on the latest news and trends in GNSS.


L1, L2, and L5 GPS Signals: What Do They Mean?

January 16th, 2019|

L1, L2, and L5 GPS Signals: What Do They Mean? Have you ever been confused by how many different types of GPS signals there are? If so, here is your quick-and-easy summary explaining L1, L2, and L5 signals and how they are used. L1 The L1 signal is the oldest GPS signal. It has two parts: the Coarse/Acquisition Code (C/A) and the Precision Code (P-code). The P-code is reserved for [...]

What is Orthoimagery?

January 15th, 2019|

What is Orthoimagery? Orthoimagery is an accurate representation of the Earth’s surface (source). When images are taken from aerial or satellite positions, distortion occurs (source). This means that the image taken is not an accurate representation of the space. This can be corrected through a process called orthorectification. After correction, distances can be accurate to the nearest four centimetres (source).  What are some common uses of Orthoimagery? Orthoimagery is used in geographic information systems [...]

What Is A Benchmark?

January 4th, 2019|

What Is A Benchmark? If you have ever used a map, chances are that map was made with the help of benchmarks. Also known as survey markers or survey monuments, benchmarks are objects used to mark key points on the Earth’s surface. Throughout history they have been used for navigation, to indicate land borders, and for mapmaking across the globe. History Historically, anything from rock towers and [...]

What is a coordinate system?

November 30th, 2018|

What Is A Coordinate System? If you have ever seen a map or globe, chances are you’ve also seen a coordinate system. A coordinate system is a grid-like system used to represent geographical locations exactly and accurately. Say you needed to instruct a friend to go somewhere, for example: a specific tree in a forest. You might try to describe the tree’s location to the person in terms of how long it takes to [...]

What affects the accuracy of my GNSS Receiver?

September 20th, 2018|

What Affects the Accuracy of my GNSS Receiver? The accuracy of GNSS readings is affected by factors such as landscape, weather conditions, satellite position, and receiver quality. The landscape around the receiver is one of the biggest factors in taking accurate measurements. Mountains, buildings, tree cover, and other objects can block or reflect GNSS signals. As a result, your receiver will probably work best in clear areas with little to no obstacles. [...]

What is the Difference Between GNSS and GPS?

September 14th, 2018|

What is the Difference Between GNSS and GPS? Most people are familiar with GPS. The Global Positioning System has probably saved you from getting lost in an unfamiliar place on at least one occasion. GNSS, however, is a term heard much less frequently. It stands for Global Navigation Satellite System, and while it is similar to GPS, there are a few key differences between the two. Just as a square is [...]