(a) Learmonth spectrogram observation covering approximately 8 hr (original image size: 1700 × 300 dpi); (b) resized Learmonth spectrogram with a resolution of 300 × 300 dpi; (c) spectrogram of a Type III radio burst within a 32 minute time window; (d) spectrogram of a Type II radio burst within a 32 minute time window; (e) processed Type II radio burst spectrogram of the same event observed by the Learmonth; (f) processed Type II radio burst spectrogram of the same event observed by the CSO. Note: no-axis spectral images for input models.