Roger Clifton Jennison - Part 1.

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    • Roger Clifton Jennison - Part 1.

      <t>Roger Clifton Jennison (18 December 1922 – 29 December 2006) worked as a radio astronomer at Jodrell Bank under the guidance of Robert Hanbury Brown. Jennison made a number of discoveries in the field of radio astronomy, including the discovery of the double nature of radio source Cygnus A (3C 405.0) with M K Das Gupta and the mapping of Cassiopeia A with V Latham.<br/>
      Early life[edit]<br/>
      Jennison was born in Grimsby, England, in 1922. His education was at Clee Grammar School for Boys.[1] He was commissioned from RAF aircrew to the Technical Branch-Signals, where he developed radar and microwave systems using the Magnetron.<br/>
      Radio astronomy[edit]<br/>
      In the 1950s he developed a new observable for obtaining information about visibility phases in an interferometer when delay errors are present called the closure phase.[2][3] He performed the first measurements of closure phase at optical wavelengths. Jennison saw greater potential for his technique in radio interferometry, and proposed that it should be tested on a three-element radio interferometer at Jodrell Bank. In 1958 he successfully demonstrated its effectiveness at radio wavelengths, but it only became widely used for long baseline radio interferometry in 1974. A minimum of three antennas are required. This method was used for the first VLBI measurements, and a modified form of this approach ("Self-Calibration") is still used today at radio, optical and infrared wavelengths.<br/>
      Academic career[edit]<br/>
      Jennison was appointed to the University of Kent at Canterbury in 1965 and was the first Professor of Physical Electronics at the University. Within a year he established the Electronics Laboratory (later Department of Electronics and now School of Engineering and Digital Arts) at the University. Prior to his appointment at Kent he was Senior Lecturer in Radio Astronomy at Jodrell Bank Observatory and Senior Lecturer in Physics, Manchester University.<br/>
      His research interests extended to relativity, studying paths of light in rotating systems, and also to studying ball lightning and water divining.</t>
    • Re: Roger Clifton Jennison - Part 2.

      <r>Here are some of the concepts he developed relating to Relativistic phase-locked cavities as particle models:<br/>
      <URL url=""><LINK_TEXT text=" ... ison2-pdf/"></LINK_TEXT></URL><br/>
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      And this is how it relates to the EMDrive: See section 2.3.<br/>
      Demonstrating Gravitational Repulsion;<br/>
      <URL url=""><LINK_TEXT text=" ... -23-08.PDF"></LINK_TEXT></URL></r>
    • Re: Roger Clifton Jennison - Part 1.

      <r>I was using Wagener article as one example of Jennison and Drinkwater experiment that simulated the properties of mass and inertia via phase-locked standing waves in a microwave transmitter/receiver system. This may be a much simpler way to design a test of the EMDrive then the complete and complicated apparatus. This method would expand the basic concept so that other factors that effect and limit the outcome of the experiment could be eliminated. What I am trying to say is there are other ways to go about testing the main concept of the drive (i.e., standing waves). I have some more articles on the subject but the only attachments that you can upload are images, maybe someone can include Pdf files? <E>:D</E> <br/>
      Jennison, R.C. “Relativistic Phase-locked Cavities as Particle Models”, J. Phys. A. Math. Gen. 11, 1978, pp 1525-1533. <br/>
      Jennison, R.C. “Wavemechanical Inertia & the Containment of Fundamental Particles of Matter”, J. Phys. A. Math. Gen. 16, 1983, pp 3635-3638.<br/>
      Jennison, R.C. “Proper Time, Proper Length & Some Comments on the Concepts of Time & Distance”, 1988, incl. in Vol. 1 of Duffy & Wegener (q.v.), pp 73-83.<br/>
      Jennison, R.C. “A New Classical Relativistic Model of the Electron”, Phys. Lett. A., Vol. 141, Nos 8-9, 20 Nov 1989, pp 377-382.<br/>
      Jennison, R.C., Jennison, M.A.C. & Jennison, T.M.C. “A Class of Relativistically Rigid Proper Clocks”, J. Phys. A. Math. Gen., 19, 1986, pp 2249-2266.</r>
    • Re: Roger Clifton Jennison - Part 1.

      <t>the question of standing waves is key to those devices...<br/>
      Looking at some theories that make thrust proportional to Q and P, I realize that P.Q/f is just describing an energy stored (in each node?), thus a mass...<br/>
      Is the emdrive just a mass of photons falling in a kind of gravitation field...</t>
      “Only puny secrets need keeping. The biggest secrets are kept by public incredulity.” (Marshall McLuhan)
      See my raw tech-watch on &
    • Re: Roger Clifton Jennison - Part 1.

      <t>I'm thinking the relation between permittivity and permeability and gravity is at play in the emdrive because a Jennison Relativistic Phase-locked Cavity is being created in the chamber, thus forming a fermion, (i.e. electron).<br/>
      I also came across something that sounds interesting, semi-confocal microwave cavities (Fabry-Perot interferometer) have a very high Q - a Q-factor that was 30,000!<br/>
      The Fabry-Perot interferometer is a very simple device that relies on<br/>
      the interference of multiple beams. It consists of two partially<br/>
      transmitting mirrors that are precisely aligned to form a reflective<br/>
      cavity. Incident light enters the Fabry-Perot cavity and undergoes<br/>
      multiple reflections between the mirrors so that the light can interfere<br/>
      with itself many times. If the frequency of the incident light is such that<br/>
      constructive interference occurs within the Fabry-Perot cavity, the light<br/>
      will be transmitted. Otherwise, destructive interference will not allow<br/>
      any light through the Fabry-Perot interferometer.<br/>
      The condition for constructive interference within a Fabry-Perot<br/>
      interferometer is that the light forms a standing wave between the two<br/>
      mirrors . In other words, the optical distance between the two mirrors<br/>
      must equal an integral number of half wavelengths of the incident light.<br/>
      The constructive interference condition is therefore defined by the<br/>
      mλ nd Θ =<br/>
      where m is an integer termed the order of interference, n is the<br/>
      refractive index of the medium between the two mirrors, d is the mirror<br/>
      separation, and Θ is the inclination of the direction of the incoming<br/>
      radiation to the normal of the mirrors.</t>