Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Assimilation of autoscaled data and regional and local ionospheric models as input source for a

real-time 3-D IRI modeling: additional and planned tests

M. Pezzopane a, M. Pietrella a, A. Pignatelli a, A. Settimi a, C. Scotto a, B. Zolesi a, C. Bianchi a, Lj. R. Cander b

a Istituto Nazionale di Geofisica e Vulcanologiab Rutherford Appleton Laboratory, Chilton, OX11 0QX, UK

michael.pezzopane@ingv.it

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Ionospheric models are important for providing a comprehensive specification of the three-dimensional (3-D) electron density of the ionosphere;

the International Reference Ionosphere is the de facto international standard for the climatological specification of ionospheric parameters;

although global models of the F2 layer critical frequency foF2 and propagation factor M(3000)F2, such as those of the CCIR and the URSI, represent a valid input source for a 3-D modeling of the ionosphere, regional and local models of these ionospheric characteristics can be important to catch some features that may be easily neglected in global models;

moreover, in the light of a real-time modeling of the ionosphere, in the last decades we have appreciated the valuable data source represented by the modern real-time ionosonde observations.

Introduction 1/2

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Introduction 2/2

real-time 3-D electron density modeling

real-time autoscaled foF2 and M(3000)F2 data and real-time electron density profiles

local/regional nowcasting maps of foF2 and M(3000)F2

[Pezzopane et al., Radio Sci., 2011]

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Input sources of the model 1/2

Autoscaling of vertical soundings

Autoscala

ARTIST[Huang and Reinisch,

Radio Sci., 1983; Galkin and Reinisch, INAG bulletin, 2008]

[Pezzopane and Scotto, Radio Sci., 2007]

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Input sources of the model 2/2

The method of determining Reff was introduced by Houminer et al. [JEEE, 1993]. Reff is chosen to give the best fit between the SIRM model calculation and real measurements obtained from a grid of ionosondes located in the mapping area. The SIRMUP has the capability to generate the real-time updated foF2 and M(3000)F2 values on a user-specified spatial grid.

SIRMUP procedure [Zolesi et al., Radio Sci., 2004; Tsagouri et al., JASTP, 2005] is based on the idea that real-time values of foF2 and M(3000)F2 at one location can be determined from the climatological SIRM model [Zolesi et al., Radio Sci., 1996] by using an effective sunspot number (Reff) based on real-time ionosonde observations instead of the smoothed sunspot number R12.

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Description of the model

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Assimilation process of the measured electron density profiles 1/2

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Assimilation process of the measured electron density profiles 2/2

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Validation results 1/4

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Validation results 2/4quasi-stationary conditions around noon

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Validation results 3/4solar terminator conditions around sunrise

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Validation results 4/4

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Additional tests 1/5

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Additional tests 2/5

positive phase

negative phase

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Additional tests 3/5

positive phase

negative phase

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Additional tests 4/5disturbed conditions – positive ionospheric phase

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Additional tests 5/5disturbed conditions – negative ionospheric phase

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Further planned tests 1/4

1) Testing the model on additional disturbed periods;

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

Further planned tests 2/4

1) Testing the model on additional disturbed periods;

2) using more than two reference ionospheric stations;

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

1) Testing the model on additional disturbed periods;

2) using more than two reference ionospheric stations;

3) use of a ray tracing technique to synthesize oblique ionograms on the basis of the IRI-SIRMUP-P 3D electron density matrix. The MUFs of these synthetic ionograms will be then compared with the MUFs of recorded oblique ionograms;

Further planned tests 3/4

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011

1) Testing the model on additional disturbed periods;

2) using more than two reference ionospheric stations;

3) use of a ray tracing technique to synthesize oblique ionograms on the basis of the IRI-SIRMUP-P 3D electron density matrix. The MUFs of these synthetic ionograms will be then compared with the MUFs of recorded oblique ionograms;

4) use of other foF2/M(3000)F2 regional models in order to test the 3-D model at different regions.

Further planned tests 4/4

Michael Pezzopane et al.

Assimilation of autoscaled data and regional and local ionospheric models as input source for a real-time 3-D IRI modeling: additional and planned tests

International Reference Ionosphere Workshop – Hermanus, South Africa, 10-14 October 2011