6. Efficiency of SPLA: Observational Validation
SPLA is validated by computing ionospheric perturbations from GPS
observations carried out during the two different geophysical events,
viz. (i) 26th December 2004 Sumatra-Andaman Tsunami,
and (ii) 25th April 2015 Nepal-Gorkha earthquake. The
perturbations occurred during these events were also computed using
residual, and differential methods for comparison. Efficiency of SPLA in
removing the aliases is validated by comparing the normalized rTEC, and
dTEC with gROT, and by computing the magnitude of aliasing.