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Harxon releases rover radio for RTK and GNSS
By Lurker,
The HX-DU1603D, designed for GNSS/RTK surveying and precise positioning, will be showcased this September at the Intergeo trade show in Berlin.
The HX-DU1603D is a lightweight, ruggedized UHF receiver designed for data communications between 410 MHz and 470 MHz in either 12.5 KHz or 25 KHz channels, which can be widely used in GNSS/RTK surveying and GNSS precise positioning fields.
It is equipped with a Bluetooth transceiver for wireless communications with external devices. It feature
Could you help me
By GISRS972,
I would like to learn WebGIS from 0
Who can help me to beginn it
Thank you very much
Map of Global Lightning
By Lurker,
Need to know where to go in order to get hit by lightning more than once? NASA has the answer for you. Based on data collected from 1998–2013 by the Lightning Imaging Sensor (LIS) on NASA’s Tropical Rainfall Measuring Mission satellite, and from 1995–2000 by the Optical Transient Detector (OTD) on the OrbView-1/Microlab satellite, a global map showing the lighting flash rate (number of flashes per kilometer per year) was created.
Based on satellite observations, researchers found that li
New Warning System for Flash Drought
By Lurker,
Drought and flash drought rank second in terms of national weather-related economic impacts behind hurricanes, with annual losses nearing $9 billion in the United States, according to the National Oceanic and Atmospheric Administration. To provide earlier detection, the Quick Drought Response Index, or QuickDRI, went operational in June 2017 as a weekly drought alarm, providing improved sensitivity to early-stage drought conditions and rapidly evolving drought events.
“QuickDRI fills a gap
Jason-2 Will Help Sea Floor Mapping
By Lurker,
A new research mission is being launched in order to continue to add to our knowledge of the seas, including expanded efforts to map the sea floor.
NASA, NOAA, the French Space Agency Centre National d’Etudes Spatiales, and the European Organization for the Exploitation of Meteorological Satellites are using their joint Jason-2 satellite for the project. The satellite was first used with these organizations for the Ocean Surface Topography Mission. Jason-2 has been in orbit for nine years a
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Are you ready to level up your geospatial skills? Join our comprehensive training course covering ArcMap, ArcGIS Pro, and ArcOnline—the essential tools for modern spatial analysis and programming! What You’ll Learn: Core functionalities of ArcMap & ArcGIS Pro Cloud-based mapping with ArcGIS Online Automating workflows with Python & ModelBuilder Creating interactive web maps & apps Who Should Enroll? GIS beginners & professionals Urban planners, environmental scientists, & data analysts Developers looking to integrate spatial programming Why Choose This Course? Hands-on projects & real-world applications Expert-led sessions & flexible learning Limited slots available! Click here to register. Let’s shape the future of spatial data together! -
GPS is an incredible piece of modern technology. Not only does it allow for locating objects precisely anywhere on the planet, but it also enables the turn-by-turn directions we take for granted these days — all without needing anything more than a radio receiver and some software to decode the signals constantly being sent down from space. [Chris] took that last bit bit as somewhat of a challenge and set off to write a software-defined GPS receiver from the ground up. As GPS started as a military technology, the level of precision needed for things like turn-by-turn navigation wasn’t always available to civilians. The “coarse” positioning is only capable of accuracy within a few hundred meters, so this legacy capability is the first thing that [Chris] tackles here. It is pretty fast, though, with the system able to resolve a location in 24 seconds from cold start and then displaying its information in a browser window. Everything in this build is done in Python as well, meaning that it’s a great starting point for investigating how GPS works and for building other projects from there. The other thing that makes this project accessible is that the only other hardware needed besides a computer that runs Python is an RTL-SDR dongle. These inexpensive TV dongles ushered in a software-defined radio revolution about a decade ago when it was found that they could receive a wide array of radio signals beyond just TV. source: Hackaday and GitHub - chrisdoble/gps-receiver
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