In 2012 we carried out a joint project with our MIT colleagues at Millstone Hill and tried a set of different polyphase codes. The results are now reported in our joint paper, which has been accepted for publication in Radio Science:
Reference: I. I. Virtanen, F. D. Lind, L. Roininen, P. J. Erickson, W. C. Rideout, M. Orispää, J. Vierinen and M. Lehtinen, Polyphase-coded incoherent scatter measurements at Millstone Hill, Radio Science (accepted 4 Aug 2013).
Abstract: We report first results of polyphase-coded incoherent scatter measurements at Millstone Hill. To our knowledge, these are the first incoherent scatter measurements with polyphase alternating codes of Markkanen et al. (2008) and optimal quadriphase sequences of Damtie et al. (2008). The results demonstrate that an arbitrary waveform generator recently installed at the Millstone Hill incoherent scatter radar, part of the NSF Geospace Facility operated by the MIT Haystack Observatory, is capable of reproducing the polyphase waveforms with an accuracy sufficient for incoherent scatter measurements. Polyphase codes will allow incoherent scatter radar experiments to be better optimized, because they provide a larger variety of code and code cycle lengths than the traditional binary codes.
An early access version is available online at http://onlinelibrary.wiley.com/doi/10.1002/rds.20058/abstract.
|The MIT Millstone Hill incoherent scatter radars.|