International Reference Ionosphere Workshop Hermanus South Africa 10

International Reference Ionosphere Workshop – Hermanus, South Africa, 10 -14 October 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 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 b Rutherford Nazionale di Geofisica e Vulcanologia Appleton Laboratory, Chilton, OX 11 0 QX, UK michael. pezzopane@ingv. it 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 Michael Pezzopane et al. Introduction 1/2 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 F 2 layer critical frequency fo. F 2 and propagation factor M(3000)F 2, 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. 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

Michael Pezzopane et al. International Reference Ionosphere Workshop – Hermanus, South Africa, 10 -14 October 2011 Introduction 2/2 real-time autoscaled fo. F 2 and M(3000)F 2 data and real-time electron density profiles local/regional nowcasting maps of fo. F 2 and M(3000)F 2 real-time 3 -D electron density modeling [Pezzopane et al. , Radio Sci. , 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

International Reference Ionosphere Workshop – Hermanus, South Africa, 10 -14 October 2011 Input sources of the model 1/2 Autoscaling of vertical soundings ARTIST [Pezzopane and Scotto, Radio Sci. , 2007] [Huang and Reinisch, Radio Sci. , 1983; Galkin and Reinisch, INAG bulletin, 2008] Autoscala 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 Michael Pezzopane et al.

International Reference Ionosphere Workshop – Hermanus, South Africa, 10 -14 October 2011 Michael Pezzopane et al. Input sources of the model 2/2 SIRMUP procedure [Zolesi et al. , Radio Sci. , 2004; Tsagouri et al. , JASTP, 2005] is based on the idea that real-time values of fo. F 2 and M(3000)F 2 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 R 12. 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 fo. F 2 and M(3000)F 2 values on a user-specified spatial grid. 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 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 Michael Pezzopane et al.

International Reference Ionosphere Workshop – Hermanus, South Africa, 10 -14 October 2011 Michael Pezzopane et al. Assimilation process of the measured electron density profiles 1/2 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 Michael Pezzopane et al. Assimilation process of the measured electron density profiles 2/2 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 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 Michael Pezzopane et al.

International Reference Ionosphere Workshop – Hermanus, South Africa, 10 -14 October 2011 Validation results 2/4 quasi-stationary conditions around noon 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 Michael Pezzopane et al.

International Reference Ionosphere Workshop – Hermanus, South Africa, 10 -14 October 2011 Validation results 3/4 solar terminator conditions around sunrise 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 Michael Pezzopane et al.

International Reference Ionosphere Workshop – Hermanus, South Africa, 10 -14 October 2011 Validation results 4/4 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 Michael Pezzopane et al.

International Reference Ionosphere Workshop – Hermanus, South Africa, 10 -14 October 2011 Additional tests 1/5 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 Michael Pezzopane et al.

Michael Pezzopane et al. International Reference Ionosphere Workshop – Hermanus, South Africa, 10 -14 October 2011 Additional tests 2/5 positive phase negative phase 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

Michael Pezzopane et al. International Reference Ionosphere Workshop – Hermanus, South Africa, 10 -14 October 2011 Additional tests 3/5 positive phase negative phase 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 4/5 disturbed conditions – positive ionospheric phase 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 Michael Pezzopane et al.

International Reference Ionosphere Workshop – Hermanus, South Africa, 10 -14 October 2011 Additional tests 5/5 disturbed conditions – negative ionospheric phase 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 Michael Pezzopane et al.

International Reference Ionosphere Workshop – Hermanus, South Africa, 10 -14 October 2011 Further planned tests 1/4 1) Testing the model on additional disturbed periods; 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 Michael Pezzopane et al.

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; 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 Michael Pezzopane et al.

International Reference Ionosphere Workshop – Hermanus, South Africa, 10 -14 October 2011 Michael Pezzopane et al. Further planned tests 3/4 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 3 D electron density matrix. The MUFs of these synthetic ionograms will be then compared with the MUFs of recorded oblique ionograms; 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 Michael Pezzopane et al. Further planned tests 4/4 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 3 D electron density matrix. The MUFs of these synthetic ionograms will be then compared with the MUFs of recorded oblique ionograms; 4) use of other fo. F 2/M(3000)F 2 regional models in order to test the 3 -D model at different regions. 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 Michael Pezzopane et al.