Frequently Asked Questions
Find on this page the answers to the most frequently asked questions.
Find on this page the answers to the most frequently asked questions.
Geolocation, literally “location on Earth”, consists of assigning latitude-longitude-altitude coordinates to an element of the globe. This is commonly referred to as “GPS coordinates” because, for the past few decades, GPS has been the fastest way to geolocate a point. If you’re not very tech-savvy, you can still position yourself using the stars, just like navigators used to do.
GNSS is the generic term for Global Navigation Satellite System (GNSS). GPS is therefore a GNSS. Galileo is a GNSS. It is managed by the European Union through its space agency, ESA. GPS is American, managed by the Department of Defense, a military administration. There is also GLONASS, the Russian, and BeiDou, the Chinese.
A GNSS is a system that allows geolocation to be carried out “by satellites”. It is composed of a constellation of satellites in Earth orbit and ground control stations to monitor their evolution and sometimes update the signal they emit.
Geolocation by satellites, as such, makes it possible to position oneself, at best, to the nearest metre. Certain specific methods, such as differential GNSS, improve this precision to below one metre, and to within a few millimetres for the most precise uses. As soon as geolocation is improved by a third-party system, it can be said to be “accurate”. However, a large number of industrial applications use decimetric or centimetric geolocation.
It is best to use what is called a GNSS receiver. This is a device that allows the signal from GNSS satellites to be tracked, digitised with good quality, and used in a positioning algorithm. For decimetric accuracy or better, it must be possible to track a certain specific part of the satellite signal, called “the phase”. Consumer receivers, for example those supplied for car or hiking use, are not capable of tracking phase and are therefore limited to metric accuracies.
The debate is open, but at FB SOLUTIONS we differentiate between a receiver and a GNSS module according to the following specificities :
Ultimately, both types of equipment serve the same purpose: precision geolocation by satellites.
Today, it is wise to answer no. There are two major constraints. Firstly, the equipment is not adequate. The GNSS chip built into smartphones does not track the phase of the signal, with a few exceptions such as the Mi8 from Xiaomi. Even so, once digitised, the signal is far too degraded for precision geolocation, due to the lack of a quality GNSS antenna. The smartphone, on the other hand, is an excellent tool for carrying the business application that needs precision geolocation as input. For example, the ReachView application allows, among other things, topographic measurements to be made using the precise position provided by the Reach RS2.
No, outdoors only, as these are GNSS reception systems. They must therefore have a clear view of the sky in order to operate.
They do not track the same signals. GNSS satellites actually transmit their signal on 2 to 4 frequencies depending on the constellation. The single-frequency receiver can process only one of these frequencies per constellation, while the multi-frequency receiver can process several frequencies.
The significant advantage of multi-frequency is that it takes advantage of the behaviour of signals of different frequencies as they pass through the atmosphere. Thanks to the properties of an electromagnetic signal in a non-vacuum environment, positioning algorithms are able to better manage the delay of the signal as it passes through the ionosphere and troposphere, thus significantly improving accurate positioning performance.
The RTK can provide accuracies from a few centimetres to a few millimetres. When we talk about Network RTK, an accuracy of 2-3 cm in position and 3-5 cm in altitude is to be expected. When we talk about Classic RTK, it is a little more subtle: the precision is a priori better, of the order of 1 cm in position and 2 cm in altitude, but these values are given relative to the RTK base. This means that if the coordinates of the RTK base are only accurate to the nearest metre, the classic RTK does not bring any improvement, it is also metric. The classical RTK therefore requires the use of a very well known base in coordinates, or doing what is necessary to recalculate them in post-processing (the PPK).
Our RTK subscription offer is valid in mainland France, excluding Corsica.
Yes, because all the receivers and modules have what is called a NTRIP client. This is a feature to be set up in ReachView. You enter your RTK account credentials and this allows the receiver to receive corrections in real time. However, in view of our special Reach RS2 subscription, which costs €800 a year, you might be tempted to take it from us!
Yes, and without any additional options. It can transmit its observations in RTCM3 format by any means: radio, NTRIP, RS-232, Bluetooth, TCP… Emlid has created a free NTRIP caster service to connect the RTK base station to the Internet. The RTK mobile phone just needs to connect to the same NTRIP caster to retrieve the observations and calculate the position in real time.
To be seen on https://caster.emlid.com
Technically, the radio makes it possible to transmit GNSS observations up to a distance of 8 km, or even more under certain conditions and with optimal settings. Nevertheless, it is better to ensure that it is used within a radius of 4 km, particularly for legal reasons in Europe. Even so, the presence of obstacles, such as buildings or dense vegetation, can reduce the range to a few hundred metres.
The Reach RS2 and the Reach RS+ have a raw data recording function, very easy to start in the field thanks to ReachView. The file is in RINEX or UBX format. Simply download it to your smartphone or tablet at the end of the session. The data format is fully compatible with RinexLab, our online PPK calculation service.
You can process data from all your Reach RS2 receivers with the same subscription. Buying it from the FB store gives you access to discounted prices compared to standard RinexLab subscriptions.
Probably yes! The application contains a long list of systems and map projections among the EPSG database. Check the official ReachView documentation to know if your country is covered.
Indeed, the Reach RS2, in the category of multi-frequency GNSS RTK receivers, is about 5 to 10 times cheaper than other historical manufacturers. And yet nobody, neither Emlid as a manufacturer nor FB SOLUTIONS as a dealer, loses money selling it. The business model is therefore viable, fortunately. There are several reasons for this, such as lower design costs – GNSS chip from the mass market, code partly from open source -, or sales optimisation with online sales.
No you are not good! This receiver allows you to do centimetric positioning like your competitors. To convince you of this, we have published a series of tests of its performance and an article in the magazine XYZ n°166 (published in March 2021). Our users only report the positive results of this device. The price should not scare you! If we have selected it as the flagship equipment of our commercial model, it is for a good reason. If we have selected it as the flagship equipment of our commercial model, it is for a good reason.
Online, we accept payment by credit card or bank transfer in Euros.
If you place an order outside the site, we only accept transfers (in Euros €).
The delivery time traditionally varies from 5 to 10 days following receipt of payment in full. When the delivery is in progress, you will receive an e-mail with the carrier’s tracking number.
Sometimes a product may be out of stock, in which case you will see the status “Out of stock” for that product. You can find the estimated shipping date in the product description.
Yes, we deliver to certain countries. To find out if your country is eligible for delivery, visit this web page. For other countries, we can only deliver on order outside the website for the moment. Contact us to get your quote with up-to-date transport costs.
No, unless the equipment is faulty when you receive it, in which case you must use the guarantee to obtain a refund.
In general, yes.
We have added in the FB store something to use your equipment in the best conditions: topographic rod, tripod, smartphone holder, external GNSS antenna and radio block for the modules, cables… We make suggestions foraccessories directly on the product pages to help you know if you need them.
The nano multi-operator SIM card we offer can be inserted in the dedicated slot of the Reach RS2 – the Reach RS+ and the modules do not have a built-in GSM modem. It provides an independent network connection to the receiver. The receiver needs a network connection to perform the following functions under ReachView:
Typically, network access is managed by the smartphone or tablet controlling the receiver via ReachView. In this case, the mobile data of the smartphone’s telecom subscription is used. However, if the intended use does not allow for this streaming connection sharing, a SIM card must be allocated to the receiver. This is why we have added it to the FB store.