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 that contain accuracy information for a particular coordinate, it uses them to determine accuracy.
TRIMBLE GPS PATHFINDER OFFICE 4.10 MANUAL
Most high-accuracy GPS receivers support the NMEA sentences that Survey123 uses however, it's recommended that you check whether your receiver supports these NMEA sentences in the receiver's user manual before you try to connect it to Survey123.
TRIMBLE GPS PATHFINDER OFFICE 4.10 FOR ANDROID
While Esri doesn't publish a list of supported GPS receivers for Android or Windows, a list of receivers used in testing on Android and Windows is provided. If you are using an iOS device, you must also use one of the GPS receivers supported on iOS. To improve the accuracy of your positions, consider using a GPS receiver that supports differential corrections. To use a GPS receiver with Survey123, the receiver must support the output of NMEA sentences. There are many GPS receivers available however, not all of them work directly with Survey123. Survey123 can use the GPS that's built into your device, or you can add an external GPS receiver to obtain high-accuracy data. Configure Survey123 to use the receiver.Take the following steps to use a high-accuracy receiver with the Survey123 field app:
To learn more, see Prepare for high-accuracy data collection. Configure Survey123 to use the receiverĪ high-accuracy GNSS receiver can be used with any survey with no prior configuration, but typically some metadata collection and accuracy rules are defined in the survey before use.