Quick Answer
Calculate GNSS Baseline Length Uncertainty Estimator for Static Survey Processing
Calculator
Result Interpretation
GNSS Baseline Length Uncertainty Estimator for Static Survey Processing Calculator computes Baseline length uncertainty in mm using the defined engineering formula and the input values provided.
Worked Example
Verified calculation
Given:
- Position Dilution of Precision = 1.9
- Ionospheric delay uncertainty = 0.3
- Tropospheric delay uncertainty = 2.1
- Baseline length = 1200
- A-priori carrier-phase measurement noise sigma = 0.8
Expected Result:
- Baseline length uncertainty = 1.5200014932887
Engineering Interpretation:
Under the given input conditions, the calculated result is: Baseline length uncertainty = 1.5200014932887 mm.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.
Formula / Method
baseline length uncertainty = sqrt(pow(a-priori carrier-phase measurement noise sigma, 2) * pow(position dilution of precision, 2) + pow(baseline length, 2) * pow(ionospheric delay uncertainty / 1e6, 2) + pow(tropospheric delay uncertainty, 2) / 1e6)Formula family: formula_survey_gnss_baseline_length_uncertainty_estimator
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| a_priori_noise_sigma | A-priori carrier-phase measurement noise sigma | INPUT | A-priori carrier-phase measurement noise sigma |
| pdop | Position Dilution of Precision | INPUT | Position Dilution of Precision |
| baseline_length_m | Baseline length | INPUT | Baseline length |
| iono_delay_ppm | Ionospheric delay uncertainty | INPUT | Ionospheric delay uncertainty |
| tropo_delay_mm | Tropospheric delay uncertainty | INPUT | Tropospheric delay uncertainty |
| baseline_length_uncertainty | Baseline length uncertainty | OUTPUT | Baseline length uncertainty |
Calculation Steps
- Enter the a-priori carrier-phase measurement noise sigma in mm.
- Enter the position dilution of precision in dimensionless.
- Enter the baseline length in m.
- Enter the ionospheric delay uncertainty in ppm.
- Enter the tropospheric delay uncertainty in mm.
- Step 1: Compute baseline length uncertainty.
- Read the baseline length uncertainty (mm) from the results.
Engineering Summary
Calculate GNSS Baseline Length Uncertainty Estimator for Static Survey Processing
Frequently Asked Questions
What does this calculator calculate?
The GNSS Baseline Length Uncertainty Estimator for Static Survey Processing Calculator estimates Baseline length uncertainty based on the input parameters you provide
Why is a-priori carrier-phase measurement noise sigma important in this calculation?
a-priori carrier-phase measurement noise sigma is directly proportional to baseline length uncertainty. When you enter a-priori carrier-phase measurement noise sigma in mm, the calculator uses it in the engineering formula to compute the output
How should I interpret the result baseline length uncertainty?
The calculator outputs baseline length uncertainty in mm. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: A-priori carrier-phase measurement noise sigma (mm), Position Dilution of Precision (dimensionless), Baseline length (m), Ionospheric delay uncertainty (ppm), Tropospheric delay uncertainty (mm). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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