eSWua: Phase Scintillation Index (Sigma-phi) computed from 50 Hz GNSS signal samples
Last modified at May 8th, 2023, 12:40 GMT
Description
The slant Sigma-Phi index (sigmaphi_slant) is calculated as the standard deviation, in radians, of the 50 Hz detrended carrier phase samples averaged over intervals of 3, 10, 30 and 60 seconds and provided for each available GNSS satellite link and signal frequencies (depending on the acquisition capabilities of the receiver). The detrending is performed by filtering the raw carrier phase measurements by a high-pass sixth order Butterworth filter having a cutoff frequency of 0.1Hz. Vertical values of the Sigma-Phi index (sigmaphi_vert) are estimated from the 1-min sigmphi_slant according to formula (3) of Spogli et al. (2014, http://dx.doi.org/10.1016/j.jastp.2013.10.003), by assuming the Ionospheric Pierce Point at an altitude of 350 km.
Capabilities
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sigmaphi_slant
- Observed Property
- Dimensionality Instance
- Dimensionality Timeline
- Units
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sigmaphi_vert
- Observed Property
- Dimensionality Instance
- Dimensionality Timeline
- Units
Data Levels
Further Information and Resources
Resources
More Properties
| Property | Value |
|---|---|
| Algorithm | Not used |
| Software Reference | Not used |
| Editor | Istituto Nazionale di Geofisica e Vulcanologia |
| Version | 1 |
| Created | Wednesday 22nd Feb. 2023, 10:40 |
| Last Modified | Monday 8th May 2023, 12:40 |