The GLO requires firmware version 3.00 or later and the GLO 2 requires firmware version 2.1 or later.
To find out the version of firmware your GPS receiver uses, pair your receiver with your device, open your device's About settings, and select the name of your paired receiver. The estimated horizontal accuracy is calculated by multiplying HDOP by 4.7, and the estimated vertical accuracy is calculated by multiplying VDOP by 4.7. If Collector doesn't receive a GST sentence from a GPS receiver, but does receive a GSA sentence, Collector estimates accuracy using horizontal dilution of precision (HDOP) and vertical dilution of precision (VDOP). If the 95% confidence accuracy setting is enabled, Collector applies a conversion factor to the RMS calculation and reports horizontal and vertical accuracy with a 95 percent confidence level. The level of confidence using RMS is 63 percent to 68 percent for horizontal accuracy, and 68 percent for vertical accuracy. Numbers are specified in root mean square (RMS). By default, the horizontal and vertical accuracy GST sentences, which contain accuracy information for a particular coordinate, it uses them to determine accuracy.
GGA: Time, position, and fix-related data.It can read the following NMEA sentences: NMEA supportĬollector supports NMEA versions 4.00 and 4.10. While Esri doesn't publish a list of supported GPS receivers for Android or Windows, a list of receivers used in testing Collector on Android and Windows is provided. If you are using an iOS device, you must also choose one of the GPS receivers supported on iOS. To use a GPS receiver with Collector, it must support the output of NMEAĠ183 sentences. There are many GPS receivers available on the market however, not all of them work directly with Collector. For help with the new app, see Choose a receiver.Ĭollector can make use of the GPS built into your device or add an external GPS receiver to obtain high-accuracy data. A new Collector app is available on Android and iOS.
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