“The SXblue II GPS* is, to my opinion, the best DGPS solution on the market today. We can constantly rely on a submeter position to map our High Power Transmission Line Pylons. We also use the SXblue II to map our access roads in record time, directly into our GIS on a tablet PC. Simply outstanding.”
HYDRO QUEBEC, TransEnergie Division, Quebec, Canada
*Currently updated to SXblue Globe
Proven advantage
in readability through thick forest canopy
We estimated cumulative accuracy to evaluate the relationship between the collection period and accuracy. GPS test sites covered a range of canopy conditions. We compared accuracy among sites to determine how canopy closure influenced location accuracy.
In general, more expensive receivers (e.g., mapping-grade or survey-grade receivers) provide better accuracy, and GPS users must balance GPS receiver cost with location accuracy when determining which receiver to use.
Finally, we compared post-hoc methods to evaluate accuracy based on characteristics of the sites and acquired GPS fixes. One of the main factors that affect GPS location accuracy is the type of GPS receiver being used.
Accuracy of a modular GPS/GLONASS receiver
Authors: Michael Joyce, Ph.D. Ron Moen, Ph.D. Natural Resources Research Institute University of Minnesota Duluth
“We tested against post-processing units in some of the toughest forestry environments that we know of. We are extremely pleased with the SXblue and its performance with WAAS.”
HYDRO QUEBEC, TransEnergie Division, Quebec, Canada
*Currently updated to SXblue Globe
HOW ACCURATE ARE SXBLUE RECEIVERS? The positions computed by your receiver are accurate (guaranteed) to within 1 meter 95% of the time (assuming a good view of the sky and minimal multipath). This accuracy is, conservatively, halve for z-values. With RTK corrections, it can go down to centimeter precision. Contact us for more details.
HOW DOES SXBLUE RECEIVERS COMPARE TO COMPETITORS' PRODUCTS? SXBlue receivers are a unique solution in that they are very compact, yet deliver very high performance. There are a number of DGPS products on the marketplace but very few of them are suitable for commercial use with such applications as GIS Mapping, due to their positioning performance and their update rates. SXBlue is up to the task and meets the needs for these applications. SXBlue also offers the facility of outputting raw measurement data for post-processing in the office.
HOW TO GET THE BEST SATELLITE TRACKING WITH SXBLUE RECEIVERS? For the best performance, please ensure that the sky above the SXBlue antenna is unobstructed for satellite tracking. The receiver tolerates a certain amount of signal blockage due to the availability of redundant satellites (only four are required for a position). However, the more satellites are blocked, the more impact this could have on your positioning accuracy.
GNSS RECEIVER VS GPS GNSS are faster and more stable due to their capacity to rely on more satellites. Differences are proband in cities, forests or other areas where line of sight with sky is obstruction to your geospatial surveying equipment.
HOW TO INTERPRET NMEA SENTENCES (GGA)? GGA - essential fix data which provides 3D location and accuracy data. $GPGGA,123519,4807.038,N,01131.000,E,1,08,0.9,545.4, M,46.9,M,*47 Where: GP means that it is a GPS position (GL would denote GLONASS). GGA Global Positioning System Fix Data 123519 Fix taken at 12:35:19 UTC 4807.038,N Latitude 48 deg 07.038' N 01131.000,E Longitude 11 deg 31.000' 1 Fix quality: 0 = invalid, 1 = GPS fix (SPS), 2 = DGPS fix, 3 = PPS fix, 4 = Real Time Kinematic, 5 = Float RTK, 6 = estimated (dead reckoning) (2.3 feature), 7 = Manual input mode, 8 = Simulation mode 08 Number of satellites being tracked 0.9 Horizontal dilution of position 545.4,M Altitude, meters, above mean sea level 46.9,M Height of geoid (meaning sea level) above WGS84 ellipsoid (empty field) time in seconds since last DGPS update (empty field) DGPS station ID number *47 the checksum data, always begins with "
WHAT IS WAAS? It is an SBAS system provided by the USA FAA covering North America free of charge.
FAQ
WHAT IS SBAS? Satellite-based Augmentation System (SBAS) augments GNSS constellation(s) by providing ranging, integrity and correction information. While the main goal of SBAS is to provide integrity assurance for aviation, it also provides sub-meter (
WHAT IS DGPS? A Differential Global Positioning System (DGPS) is a broad term that describes various ways of enhancing the Global Positioning System (GPS). It provides improved location accuracy from the nominal GPS accuracy (15 meters) to about 1-3 cm in case of the best implementations. All SxBlue’s receivers are DGPS systems using SBAS corrections.
WHAT IS GPS & GNSS ? GPS stands for global position system, a (US satellite-based). GPS might refer by extension to the receiver. GNSS stands for Global Navigation Satellite System and regroup every regional satellite navigation system (GPS, GLONASS, BEIDOU, GALILEO, ect.).
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“We tested against post-processing units in some of the toughest forestry environments that we know of. We are extremely pleased with the SXblue and its performance with WAAS.”
HYDRO QUEBEC, TransEnergie Division, Quebec, Canada
*Currently updated to SXblue Globe
WE WORK WITH THE WORLD'S BEST MAPPING SOFTWARE,
AND OUR CUSTOMERS CAN GET IT FOR FREE!
WHAT DATA COLLECTION METHODS WORK BEST WITH SXBLUE RECEIVERS? FieldGenius software works flawlessly with Geneq GNSS receivers, and makes great use of high definition displays on SXPad data collectors with its high resolution interface and large/clear icons. FieldGenius includes more advanced features than any other data collection system.
FIELD GENIUS: DIGITAL TERRAIN MODELING, VOLUMES AND CONTOURING FieldGenius has the ability to create and utilize DTM surfaces from existing survey data or create a DTM in real time as the data is collected. The TIN and contours will automatically update as each new shot is taken.
RTK AND L-BAND CORRECTION SERVICES Atlas is the most flexible service on the market, delivering its correction signals via L-band satellites or over the internet at accuracies ranging from meter to sub-decimeter levels. It is Hemisphere GNSS’ new GNSS correction service, offering the most innovative correction service available in the industry, providing performance that meets or exceeds that delivered by other industry leaders, at market-leading prices.
Figure 3. Mean cumulative accuracy over time. T
Меченосец. Проханов А.А.
Меченосец. Проханов А.А.
Меченосец. Проханов А.А.
Меченосец. Проханов А.А.
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Проханов меченосец слушать
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