The measurement performance of the dual-frequency correlation radar altimetry for the estimation of the sea wave heights is not as accurate in satellite as in airborne platform. Multi-frequency sensing signals can be applied to obtain sea surface state information while maintaining sensitivity over wide range of sea wave turbulences from space. The proposed method uses a sensing signal with angle modulation with optimum modulation index of m = 4.5, which enables to obtain a spectrum from 11 harmonics, instead of generating 11 frequency transmit signals for spaceborne multi-frequency radar altimetry. Maximum sensitivity of the measurement to the root-mean-square of the sea wave heights was obtained for the optimal frequency gaps between transmit signals.
Bibliographical noteFunding Information:
This research was supported by the Ministry of Science, ICT and Future Planning (MSIP), Korea, under the 'IT Consilience Creative Program' (IITP-2015-R0346-15-1008) supervised by the Institute for Information & Communications Technology Promotion (IITP); Hanwha-Thales, Korea, and supported by the Russian Science Foundation (research project no. 15-11-10022) and State Tasks in the field of scientific activity (research project no. 8.152.2014/K).
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering