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Pro XL System C<br />

C.5 Operational Aspects Specific to the GPS Pathfinder<br />

Pro XL<br />

The following sections outline the operational aspects specific to the<br />

GPS Pathfinder Pro XL system.<br />

C.5.1 Submeter Accuracy<br />

C.5.2 RTCM Input<br />

To achieve accuracy with the Pro XL receiver of better than 1 meter<br />

(RMS) +2 ppm times the distance between the base station and the<br />

rover, you must use the following GPS rover options configuration<br />

settings in the Asset Surveyor software.<br />

You must also be using a base station which is logging or transmitting<br />

(in RTCM messages) synchronized measurements, and which is<br />

equipped with a Pro XL, Pro XR, Pro XRS, 4600LS, Site Surveyor<br />

4400, GPS Total Station 4700, GPS Total Station 4800 or Series 4000<br />

GPS receiver. Your roving receivers must be within 200 km of your<br />

base station. Table C.1 lists the recommended settings.<br />

Table C.1 Recommended settings<br />

Setting Recommended value<br />

Position mode Overdet. 3D or Manual 3D<br />

PDOP mask 4.0 or less<br />

SNR mask 6 or more<br />

Elevation mask 15 degrees or more<br />

The Pro XL receiver supports the RTCM input. Both RTCM version 1<br />

and RTCM version 2 are supported. Connect your RTCM link directly<br />

to the cable labeled ‘RTCM’.<br />

TSC1 Asset Surveyor Operation Manual 253

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