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GNSS Research and Application for Polar Environment (GRAPE)

For further details see the the GRAPE website


Built on the Action Group GWSWF, the Expert Group GRAPE intends to continue to intensify the efforts to build and coordinate a robust network of collaborations in order to answer a variety of space weather related needs through ad hoc data sharing and model development.

GRAPE is based on the use of the classical GPS POLENET array and the growing coverage of modern GNSS systems, on the availability of advanced modelling and on the opportunity offered by the advancing solar cycle.

Work Packages

1. S-T interactions and ionospheric effects in the current solar-cycle

Chair: Paul Prikryl ; Co-chair: Emilia Correia

  • Multi-instruments investigation of the upper atmosphere plasma dynamics and scintillation generation (SuperDARN, GNSS, ionosondes, VLF, etc.)
  • Scintillation climatology, TEC fluctuations, structure scale, C/N statistics, etc.

2. Lower atmosphere delay in GNSS based systems (water vapor reconstruction etc.)

Chair: Monia Negusini 

3. Modelling and models testing

Chair: Marcin Grzesiak 

4. Data management strategy

Chair: Vincenzo Romano ; Co-chair: Pierre Cilliers 

5. Coordination with other programmes inside and outside SCAR (e.g. URSI, CAWSES II, SuperDARN, EISCAT 3D)

Chair: Maurizio Candidi


Terms of Reference

The main objectives of GRAPE are to:

  • Create and maintain distributed networks of specialized GPS/GNSS Ionospheric Scintillation and TEC Monitors particularly at high latitudes;
  • Identify and quantify mechanisms that cause scintillation and control interhemispheric differences, asymmetries and commonalities in scintillation occurrence and intensity as a result of the geospace environment conditions;
  • Develop ionospheric scintillation climatology, tracking and mitigation models to improve prediction capabilities of space weather;
  • Retrieve tropospheric PWV for input to weather forecast models and to develop regional PWV climatology for atmospheric sensing in remote areas.