Increase in Interference Levels in the 45 – 870 MHz Band at the Spanish e-CALLISTO Sites over the Years 2012 and 2019

1. Prieto, M.
2. Gordo, J.B.
3. Rodríguez-Pacheco, J.
4. Martínez, A.
5. Sánchez, S.
6. Russu, A.
7. Monstein, C.
8. Fernández, R.