urn:nasa:pds:context:instrument:pvmp.lp.lir 1.0 1.20.0.0 Product_Context 2023-12-11 1.0 Initial creation of the Multiprobe context products urn:nasa:pds:context:instrument_host:spacecraft.pvmp.lp instrument_to_instrument_host 10.1109/TGRS.1980.350289 Boese, R. W., et al., The infrared radiometer on the sounder probe of the Pioneer Venus mission, IEEE Trans. Geosci. Rem. Sens., GE-18, No. 1, 97-99, doi:10.1109/TGRS.1980.350289, Jan. 1980 reference.BOESEETAL_1980 PIONEER VENUS LARGE PROBE INFRARED RADIOMETER Radiometer not applicable not applicable INSTRUMENT OVERVIEW =================== The objectives of this experiment were to measure the atmosphere thermal flux profile, detect cloud layers and infer their composition, and estimate the atmospheric water vapor content. This experiment used a 4-channel infrared radiometer looking down from the probe. Two internal blackbodies were used to allow absolute measurements of the flux in each channel. The instrument weighed about 2 kg and used about 3 W of power.