Baseline Accuracy

Baseline Accuracy

Horizontal Accuracy :           3mm + 0.1ppm (Static) or better

          

Vertical Accuracy :               5mm + 0.5ppm (Static) or better

           

We can meet these accuracies when the receiver on both sites that make the baseline are using the same antenna at the base and at the remote receiver.

What is a Baseline

 A baseline is a 3D vector between two Sites. In EZSurv, a baseline can be defined between two sites if they have simultaneous GNSS observations;

 The simultaneous time required to define a baseline may vary (5, 10, 30, 60 min) depending on few parameters like vector's length, sky visibility, multipath at both sites and finally depending on the expected accuracy (50 cm accuracy does require the same observation conditions than 5 mm accuracy);

 You can have multiple observations of the same baseline, from multiple site occupations.

 Typically, a baseline is expected to be accurate at the centimeter level.

 Multiple site connections (through baseline vectors) will define a network that will require a least-squares adjustment to obtain unique/optimal results.

Precision and reliability may be subject to anomalies due to multipath, obstructions, satellite geometry, and atmospheric conditions. The specifications stated recommend the use of stable mounts in an open sky view, EMI and multipath clean environment, optimal GNSS constellation configurations, along with the use of survey practices that are generally accepted for performing the highest-order surveys for the applicable application including occupation times appropriate for baseline length. Baselines longer than 30 km require precise ephemeris and occupations up to 24 hours may be required to achieve the high precision static specification.

Article: 000023

Related Products: EZSurv

Last Update: 2016-07-14 18:44:15

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