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The AltiKa altimeter records the reflection of K a -band radar pulses from the Earth's surface, with the commonly used waveform product involving the summation of 96 returns to provide average echoes at 40 Hz. Occasionally there are 1-second recordings of the complex individual echoes (IEs), which facilitate the evaluation of on-board processing and offers the potential for new processing strategies. Our investigation of these IEs over the ocean confirms the on-board operations, whilst notingdoi:10.1080/01490419.2014.984882 fatcat:y2evjmk3qrbdtbna2bk53i3ooa