RFI Mitigation and Burst Detection with a Digital Receiver
Rodolphe Weber, LESI / Polytech'Orleans
Laurent Denis, Station de Radioastronomie de Nanšay
Cedric Dumez-Viou, LESI / Station de Radioastronomie de Nanšay
RDH (Reconquest of Radio Spectrum) is a high dynamic receiver currently developed at the Nanšay Observatory in France. It is currently connected to 2 instruments that observe 10 to 30 cm long wavelength for the Nanšay Radio Telescope (NRT) and 3 to 30 m long for the Nanšay Decameter Array (NDA). The NRT is aimed for weak radio sources such as galaxies, comets, pulsars,... and the NDA is mainly used to study radio emission of the Sun and Jupiter. Algorithms are currently being implemented to allow those instruments to provide scientists with data free of RFI. Clear reobservation of the IIIZW35 MegaMaser has been made under Iridium interferences (a satellite constellation that uses TDMA-FDMA) and H1 radicals from galaxies start to appear when national airports radar pulses are removed. The other potential of RDH is the detection and recording of brief signals received from the Sun and Jupiter. Simulation and hardware tests are driven to allow future full time survey of radio emissions at a high frequency and time resolution.