Technical Specifications Receiver Performance Data + Industrial operating temperature range: -40 ~ 85 ℃
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Windows location sensor support (u-blox USB) Compatible with GPSD PPS support (GR-701W) PPS support for timing application, including PPS over USB External backup power option via I/O pin is available for special application of high working Backup battery support for faster position fix Connector: PS2, Microfit, RJ45, DB9, USB etc. Electrical interface support: USB, RS232, TTL GNSS support : either GPS/QZSS (default) or GLONASS High performance: -162dBm+ tracking sensitivity It supports either USB, TTL, or RS232-based mini-DIN interface. The built-in u-blox7 chip and our experienced design provide fast acquisitions and excellent tracking performance.
Someone please prove us wrong.GR-701 is an easy to use, ultra-high performance, low power, industrial grade GPS smart antenna. I've heard stories of such fabled GPS receivers, but I have never gotten to touch one. Most modules can get it down to +/-3m, but if you need sub meter or centimeter accuracy, it gets really expensive. Amazing! I say +/- because it can vary between modules, time of day, clarity of reception, etc. How accurate is GPS? Well it varies a bit, but you can usually find out where you are, anywhere in the world, within 30 seconds, down to +/- 10m. If you can get near a window - it will help a lot. I hear there are reception problems in the urban canyons of places like New York City. 12,552 miles above you, so be sure and point the ceramic towards the sky, ok? GPS antennas are getting better, and you can certainly get GPS signal indoors, but it's hit-or-miss. Oh hey - as I mentioned, the satellites are in the sky like. There are some other GPS antenna technologies (chip, helical), but they are not as common, a bit more expensive, and require significantly more amplification and filtering. Sound expensive? Well, they make a lot of them. HDI head Unit to a double din digital radio with phone / usb / gps support. Each antenna is finely trimmed to pickup the GPS L1 frequency of 1.57542 GHz. Buy Car Stereo Radio for Peugeot 207 2007-2014 Double Din Head Unit DSP Auto. What is that? That is a precisely made chunk of ceramic. Many modules come with this chunk of something on top of it. If you don't mind waiting a little longer for a lock, 12 or 14 channels will work just fine for tracking. After you get a lock, some modules will shut down the extra blocks of channels to save power. The BU-353-S4 is powered by a SiRF Star IV GPS chipset, and will provide you with performance in urban canyons, and in dense foliage. Since the module doesn't know which satellites are in view, the more frequencies that you can check at once, the faster you'll find a fix. The BU-353-S4 is a USB GPS receiver that features a highly sensitive, low power consumption chipset in a ultra compact form factor. Number of ChannelsĮven though there are only so many GPS satellites in view at any given time, the number of channels that your module runs will affect your time to first fix. If a unit appears to have super-groovy-low power consumption, make sure there's an antenna attached. Keep in mind, also, that GPS antennas usually enlist the help of an amplifier that draws extra power. It's a lot of work, and yet that's exactly what these tiny GPS units are doing (multiple times per second!) so they can use a lot of power. If someone asked you to crunch a bunch of numbers that you had to get from satellites in orbit around the Earth and use that information to figure out where you were, you'd flat out refuse.
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On the plus side, if you have a module that runs at 5 or 10Hz, it can usually be configured to run at an easier pace.
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Keep in mind, though, that a fast update rate means that there's more NMEA sentences flying out of the module, some microprocessors will be quickly overwhelmed trying to parse that much data. 5 and even 10Hz update rates are becoming more and more available for cheap. However, UAVs and other flying or fast vehicles may require faster update rates to stay on track. The fact is, unless you're on an airplane or something, you're probably not going fast enough to have changed position significantly in the past second. The standard for most devices is 1Hz (Only once per second). The update rate of a GPS module is basically how often it recalculates and reports its position. GPS modules are getting ever-smaller (Your tiny, tiny cell phone has one in it!) but remember that in general, the antenna has to shrink to fit the module which will affect things like lock time and accuracy. This is something you need to consider if your project is supposed to be pocket-sized.