Magellan ProMark3 RTK Specifications download pdf (Page 236)

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13.Accuracy

RTK

Operating Conditions

Unless otherwise mentioned, all performance figures given in

what follows were collected in kinematic mode and open sky

environment.

Open sky is defined as:

- No obstructions above 10-degree elevation

- No metal-like reflectors within 100-meter radius

- More than 5 satellites tracked above 5-degree elevation

- Maximum SNR value is greater than 52 dB.Hz.

- No satellite above 10-degree elevation has an SNR figure

less than 30 dB.Hz (external antenna used).

- In RTK mode, differential corrections are available for at

least 7 satellites received.

Partly blocked sky is defined as a situation where at least one

of the requirements above is not met, but the number of

tracked satellites above 10 degrees is still over 4.

SBAS availability is defined as:

- At least one SBAS satellite providing fast+long corrections

for at least 6 GPS satellites and at least half of complete

ionosphere grid (for SBAS differential).

- Any SBAS satellite providing code & carrier measurements

and ephemeris data with URA<6 is considered as a

healthy satellite.

Position Accuracy

“Float” position status:

- Accuracy at start up: 35 cm + 1 ppm (CEP)

- Accuracy after 300 seconds: 20 cm + 1 ppm (CEP)

- Accuracy after sufficient convergence: 5 cm + 1 ppm

(CEP)

“Fixed” position status:

- Accuracy: 1cm + 1ppm (sigma horizontal)

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Magellan ProMark3 RTK Specifications Page 236