Delay Doppler Mapping Instrument (DDMI)
The DDMI will use a GPS receiver and antennas to provide unprecedented high-temporal-resolution wind field imagery of tropical cyclone genesis, intensification and decay.
- Delay Mapping Receiver (DMR) electronics unit: GPS receiver
- Two nadir-pointing antennas for collecting GNSS signals
- One zenith-pointing antenna providing space-geolocation capability
Technical Implementations of GPS Receiver
The GPS receiver performs standard GPS navigation and timing functions, and provides digital signal processing. The processing generates maps of GPS signals scattered from the ocean surface. The maps are called Delay Doppler Maps (DDMs), and the DDMI is capable of capturing four DDMs simultaneously.