TechTIDE Warning Services

You can access Real-Time and Archived data and products resulted from the TechTIDE methodologies at:

  • Open access to the latest and archived results (ASCII/image) of the main TID detection codes and to the TID activity report: TechTIDE Warning Services User Interface
  • Open access to the archive in the TechTIDE database using the API, for massive downloads: TechTIDE API


Summary of TechTIDE products and services provided from the TID detection methods.

IdN, Method Main Characteristics Basic Product Value added Product


Detects perturbations in space from all possible sources (solar and lower atmosphere origin); suitable for the identification of MS and LS TIDs.

Input: Signal properties from Digisonde synchronized operation.
Output: TID velocity, amplitude, propagation direction at the signal reflection point between the stations.
TID characteristics: TID Period, Phase Velocity, Direction of propagation, Wavelength, and Amplitude. Maps of the current TID activity.
Plots of TID characteristics.

HF Interferometry

Finds oscillation activity in ionospheric characteristics and it can detect LSTIDs.

Input: Ionospheric characteristics from VI and OI soundings.
Output: 2D TID vector velocity, amplitude and period.
Dominant period, Amplitude and 2D Vector velocity of detected LSTID. Maps of TID velocities (Europe and Global).
Plots of TID parameters per station.

Spatial & Temporal GNSS Analysis - AATR Indicator

Detects perturbations in space from all possible sources (solar and lower atmosphere origin); suitable for the identification of MS and LS TIDs.

Input: GNSS TEC from single receivers over a region.
Output: Fluctuations associated to the TIDs and estimation of the propagation parameters (direction, velocity and amplitude).
TID Velocity, Direction of propagation and Amplitude.
The AATR index over specific locations.
The MSTID occurrence over specific locations (daily plots).
European maps of the AATR indicator.

GNSS TEC Gradient

Analyses TEC maps and it is mostly sensitive to perturbations from LSTIDs.

Input: Grids of TEC maps over a region.
Output: Latitude-time maps of TEC gradients and indication of significant gradients.
TEC Gradients. Graphical presentation in an image.

3D EDD Maps

Analyses maps of TEC and ionospheric characteristics and it is sensitive to perturbation from LSTIDs.

Input: Ionospheric characteristics at the hmF2 altitude and TEC maps.
Output: Analytical function of the electron density distribution with altitude from 90 km to 22000 km.
Electron density profile over a single location.
The detrended electron density over station.
Maps of the electron density.
The height where the max perturbation in the electron density occurs.


Reconstructs daily plot of the vertical movement of the ionospheric layers; can capture oscillations detected in space from all possible sources.

Input: Raw vertical ionogram binary data from single station.
Output: Reconstructed daily variability of F region virtual height.
Period of dominant wave activity. Relative contribution of detected LSTID to the total variance.


Analyses Doppler shift of radio signals to detect quasi-periodic perturbations due to MSTIDs.

Input: CDSS reflected signals, ionospheric characteristics and irregularities.
Output: Doppler shift, SNR and confidence level.
Period, Amplitude and Phase of Doppler measurements. MSTIDs Characteristics.