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We present a cross-correlator ASIC for synthetic aperture imaging of Earth's atmosphere. Reconfigurability as a 2-level 96-channel or 3-level 48-channel cross-correlator provides adaptability to a wider array of applications. Implemented in a 65-nm CMOS process, the cross-correlator is capable of running at clock speeds of up to 3 GHz. In 2-level 96-channel mode, the cross-correlator consumes only...
Coliform mastitis is a severe and sometimes fatal disease characterized by an unregulated inflammatory response. The initiation, progression, and resolution of inflammatory responses are regulated, in part, by potent oxylipid metabolites derived from polyunsaturated fatty acids. The purpose of this study was to characterize the biosynthesis and diversity of oxylipid metabolites during acute bovine...
In this paper, the challenges and various aspects in designing non-cryogenic space radiometers are discussed in general, both from a system level perspective as well as on a subsystem and technology level. Specifically two recent European radiometer instruments, the Geosounder interferometer and the STEAMR limbsounder are described in depth. Other concurrent radiometer subsystems under development...
We present a high-speed low-power 8-channel comparator tailored for the application of sampling antenna signals in a cross-correlator system for space-borne synthetic aperture radiometer instruments. Features like clock return path, perchannel offset calibration and bias current tuning make the comparator adaptable and gives the possibility to adjust the comparator for low power consumption, while...
A high-speed low-power cross-correlator ASIC has been implemented in a 65-nm CMOS process for the purpose of synthetic aperture radiometry from geostationary orbiting earth observation satellites. The chip performs cross-correlation on all individual signal pairs from 64 digital 1-bit inputs, which amounts to 2016 individual cross-correlation products. The experimental evaluation, using a specially...
The biomagnification of methylmercury (MeHg) amongst trophic levels results in high levels of this compound in many freshwater fish species. The role of parasites in MeHg cycling and trophic transfer in freshwater systems is largely unknown. This study examined the potential for metacercariae of Apophallus brevis to accumulate and biomagnify MeHg from their second intermediate host, yellow perch,...
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