Trimble Outdoors JUNO ST handheld Manuel d'utilisateur télécharger pdf (Page 55)

Juno ST Handheld User Guide 53

Using GPS 5

Using SBAS differential corrections

The Juno ST handheld has an integrated receiver that uses Satellite Based

Augmentation Systems (SBAS) correction messages to improve the accuracy and

integrity of GPS data as you collect it. The Juno ST handheld supports the WAAS SBAS

system, which provides real-time DGPS coverage for the United States of America. The

receiver tracks SBAS satellites according to its geographical location.

For more information about how real-time differential

GPS works, see Differential GPS, page 48.

To use SBAS corrections:

1. In the TerraSync software, open the Real-time

section and tap the

Setup button .

2. In the Choice 1 field, select Integrated SBAS.

3. In the Choice 2 field, specify whether to use

uncorrected positions or to stop using GPS

positions, if corrections are not available.

4. Tap

OK.

Outputting NMEA data

You can use the Juno ST handheld's integrated GPS receiver with any GPS field

software that accepts NMEA messages.

If you connect to the GPS receiver using Trimble GPS

field software, NMEA output is switched off by default.

Note – You can only enable NMEA data output using the

GPS Controller software. The software is available as a free

download from the Trimble website. For more information,

see GPS Controller software, page 50.

To enable NME A data output:

1. In the GPS Settings form, set the NMEA Output

field to On.

2. Tap the

Setup button that appears next to the

NMEA Output field to configure the NMEA

message output settings.

For more information, refer to the GPS Controller Help.

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Trimble Outdoors JUNO ST handheld Manuel d'utilisateur Page 55