LATPROP-UWB system was built to perform EM measurements in marine environments at multiple frequencies. The system is able to sweep from 2-40 GHz and records the propagation loss under non-standard propagation conditions. The transmitter (TX) and the receiver (RX) are fully synchronized, both simultaneously sweeping the frequency. Since the system is designed to be deployed on open ocean and TX-RX distance can be 100 km or more. The receiver end equipped with an OS and spectrum analyzer and used to control Tx to continue emitting, switch to another frequency band or stop. Rx and Tx are able to communicate via GPIB or Ethernet. The synchronization can also be done using the high-fidelity GPS-locked 10 MHz source and timer on each side. The system was deployed between shore and Research Platform (R/P) FLIP at approximately 50 km from each other forming a multifrequency point-to-point EM link with continuous recording of the date between TX and RX and long time series recordings for scintillation analysis for a select few frequencies.
LATPROP-Radar is a X-band 25 kW Koden marine radar heavily modified with new IF section, stable LO, high-speed ADC, and a 10 ft-diameter dish with 48 dB gain with a temperature controlled radar and IF box. Hence it is a fully coherent-on-receive and software-defined radar system. The primary purpose of the system is to study RFC, sea clutter in ducted, low grazing angle scenarios, and radar performance analysis in ducted conditions. LATPROP-Radar was deployed on the shore during the experiment continuously recording clutter power vs range.
Three different results will be given:
1- Remote sensing of atmospheric refractivity using multifrequency point-to-point link.
2- Scintillation/fading study obtained from point-to-point link.
3- Sea surface RCS analysis at lower grazing angles using the radar and Refractivity from Clutter (RFC) results.
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