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Site Surveyor 4400 Receiver E<br />

E.5 Operational Aspects Specific to the Site Surveyor<br />

4400 Receiver<br />

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

Site Surveyor 4400 receiver.<br />

E.5.1 Submeter Accuracy<br />

If order to achieve accuracy with the Site Surveyor 4400 receiver of<br />

better than 1 meter (RMS) +2 ppm times the distance between the base<br />

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

configuration settings in the Asset Surveyor software. Table E.1 lists<br />

the recommended settings.<br />

Table E.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 />

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 XR, Pro XRS, Pro XL, 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. Finally, if you are performing differential correction by<br />

postprocessing your data, you must use the Differential Correction<br />

utility from the GPS Pathfinder Office software suite.<br />

TSC1 Asset Surveyor Operation Manual 273

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