Editing Rotational spectroscopy (section)

====Chirped-Pulse FTMW spectrometer====
Noting that digitisers and related electronics technology had significantly progressed since the inception of FTMW spectroscopy, [[Brooks Pate|B.H. Pate]] at the University of Virginia<ref>{{cite web|title=Web page of B.H. Pate Research Group, Department of Chemistry, University of Virginia|url=http://faculty.virginia.edu/bpate-lab/}}</ref>  designed a spectrometer<ref>{{cite journal|title=The rotational spectrum of epifluorohydrin measured by chirped-pulse Fourier transform microwave spectroscopy|last=Brown|first=G.G.|author2=Dian, B.C.|author3=Douglass, K.O.|author4=Geyer, S.M.|author5=Pate, B.H.|journal=J. Mol. Spectrosc.|date=2006|volume=238|issue=2|pages=200–212|doi=10.1016/j.jms.2006.05.003|bibcode = 2006JMoSp.238..200B }}</ref> which retains many advantages of the Balle-Flygare FT-MW spectrometer while innovating in (i) the use of a high speed (>4 GS/s) arbitrary waveform generator to generate a "chirped" microwave polarisation pulse that sweeps up to 12&nbsp;GHz in frequency in less than a microsecond and (ii) the use of a high speed (>40 GS/s) oscilloscope to digitise and Fourier transform the molecular free induction decay. The result is an instrument that allows the study of weakly bound molecules but which is able to exploit a measurement bandwidth (12&nbsp;GHz) that is greatly enhanced compared with the Balle-Flygare FTMW spectrometer. Modified versions of the original CP-FTMW spectrometer have been constructed by a number of groups in the United States, Canada and Europe.<ref>{{cite journal|title=A search accelerated correct intensity Fourier transform microwave spectrometer with pulsed laser ablation source|last=Grubbs|first=G.S.|author2=Dewberry, C.T. |author3=Etchison, K.C. |author4=Kerr, K.E. |author5= Cooke, S.A. |journal=Rev. Sci. Instrum.|date=2007|volume=78|issue=9|pages=096106–096106–3|doi=10.1063/1.2786022|pmid=17902981|bibcode = 2007RScI...78i6106G }}</ref><ref>{{cite journal|title=Two-Dimensional Chirped-Pulse Fourier Transform Microwave Spectroscopy|last=Wilcox|first=D.S.|author2=Hotopp, K.M.|author3=Dian, B.C.|journal=J. Phys. Chem. A|date=2011|volume=115|issue=32|pages=8895–8905|doi=10.1021/jp2043202
|pmid=21728367|bibcode=2011JPCA..115.8895W}}</ref> The instrument offers a broadband capability that is highly complementary to the high sensitivity and resolution offered by the Balle-Flygare design.