Until 2024/09/04, please see:

- A multi-GNSS, multi-frequency and near-real-time ionospheric TEC monitoring system for South
  America, by Mendoza, L. P. O., Meza, A. M. and Aragón Paz, J. M. (2019), in Space Weather,17,
  doi:10.1029/2019SW002187.
- Near-real-time VTEC maps: new contribution for Latin America Space Weather, by L. Mendoza,
  A. Meza, J. M. Aragón Paz, in Advances in Space Research, doi:10.1016/j.asr.2019.08.045.

Since 2024/09/05:

- sampling rate 15 minutes --> 10 minutes.
- mapping with continuous curvature spherical splines in tension -->
  2D binning weighted w.r.t. sqrt() of distance.

Since 2025/05/22:
- deprecated legacy data streams from UNAVCO (USA).
- added new data streams from EarthScope (USA).