User talk:TJC

Radar
Good additions to radar! I've tried to integrate your wikilinks into the flow of the article, but it can definitely be improved.. Also, the "also see" area is for things not already linked in the article.

In my edits I noticed an inconsistency that you might be able to help with. Can you take a look on the talk page. Thanks - Davandron | Talk 19:01, 22 February 2007 (UTC)

Your image on Radar Signal Characteristics is slightly wrong. There are 5 black spectral components of the transmit pulses depicted but only 3 red doppler shifted echo components. I cannot imagine a target that would selectively scatter only 3 of 5 narrowly spaced frequencies. Positive doppler shift due to a closing target does not imply it reflects only frequencies from the upper carrier sideband. HTH! 13:41, 9 January 2016 (UTC)
 * Thanks for pointing that out. You are the first to notice that over-simplification since I posted that diagram in February 2007! :-)  Terry C (talk) 16:14, 9 January 2016 (UTC)

Notification: changes to "Mark my edits as minor by default" preference
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Thank you for your understanding and happy editing :) Editing on behalf of User:Jarry1250, LivingBot (talk) 21:18, 14 March 2011 (UTC)

Proposed deletion of File:Basic Radar Spectrum.png


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Proposed deletion of File:Pulse-Doppler Spectrum.png


The file File:Pulse-Doppler Spectrum.png has been proposed for deletion&#32;because of the following concern: "unused, low-res, no obvious use"

While all constructive contributions to Wikipedia are appreciated, pages may be deleted for any of several reasons.

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is this the equation for radar

 * $$f = \left ( \frac {c \pm v_\text{r}}{c} \right ) $$×$$ \left ( \frac {c}{c \pm v_\text{s}} \right ) f_0$$ — Preceding unsigned comment added by 2601:2C3:4201:D70:690C:73F3:7659:6FB8 (talk) 19:20, 3 June 2020 (UTC)
 * I'm not sure what this equation is, since I do not recognise it. A number of equations are relevant to radar, some of which may be found further down this article and some in other articles relating to radar; see the related articles at the bottom of the Radar page..  In any case, the main reason that I undid that contribution was because it was placed at the very top of the article without any explanation and completely st odds with Wikipedia guidelines.  I was uncertain if the contribution was some sophisticated form of vandalism or the work of someone who was unaware of how to contribute correctly.  Please explain why you put it there.Terry C (talk) 05:53, 4 June 2020 (UTC)
 * I really don't see how subtly changing the equation helps; I still don't know why you have put it here. Since you have not chosen to explain your actions, I can only conclude that your original change on the main page was vandalism and not a genuine error.  Please stop cluttering up my Talk page with specious entries.  Terry C (talk) 05:06, 10 June 2020 (UTC)

Is there a 3rd doppler shift when the source and reflector travel toward each other

 * I don't understand the question. There is a doppler shift when one, the other or both vehicles travel towards or away from each other.  Only one, not a second or a third.  Recall that the frequency change is not real; it is only apparent to the observer in either vehicle.  Terry C (talk) 05:16, 6 June 2020 (UTC)