urn:nasa:pds:context:instrument:ice.radwav 1.0 1.11.0.0 Product_Context urn:nasa:pds:context:instrument:radwav.ice 2021-02-24 1.0 Changed inst LIDs from u:n:p:c:i:instID.scID to u:n:p:c:i:scID.instID And per "Guide toPDS4 Context Products" v1.7, changed all lidvid_reference to lid_reference urn:nasa:pds:context:instrument_host:spacecraft.ice instrument_to_instrument_host Reinhard, R and B. Battrick (eds), 'Space Missions to Halley's Comet', European Space Agency ESA SP-1066, ESA Pub Div, Moordwijk, Netherlands, 1986. reference.ESA-SP1066 RADIOWAVE DETECTOR Radiometer not applicable not applicable Instrument Overview =================== Fluctuating electric fields are detected in three pairs of orthogonal antennas, one aligned with the spacecraft spin axis and the other two in the equatorial plane (Fig. 6). The antenna voltages are preamplified and then analyzed by a radiometer consisting of four superheterodyne receivers, which step through the frequency range from 30 kHz to 2 MHz. Two channels are narrow-band with a filter bandwidth of 3 kHz, and two have a filter bandwidth of 10 kHz. The narrow-band filters sweep between 30 kHz and 1 MHz in 12 steps, while the broadband filters cover frequencies between 40 kHz and 2 MHz, also in 12 steps. The frequencies are scanned in a nonlinear manner so that the highest frequencies are sampled 12 times as often as the low frequencies. The complete scan sequence consists of 72 steps; 56 s are required to read out all channels at 1024 bit/s.