Re: The Shapiro's experiment HOAX. A 1968 TIME article.

On 2024-10-18 19:40:13 +0000, J. J. Lodder said:

rhertz <hertz778@gmail.com> wrote:
 

On Wed, 16 Oct 2024 17:58:47 +0000, J. J. Lodder wrote:
 <snip>
 

Moreover, Shapiro's paper is titled
FOURTH TEST OF GENERAL RELATIVITY: --PRELIMINARY RESULTS-- [Emph. JJL]
 For Shipiro the results were at the edge of what was technically
possible to detect, -at the time-.
Nowadays taking Shapiro delay has to be incorporated
into space probe tracking and orbit determination.
Nutters worry about popular reports of the original experiment,
while the results themselves are standard everyday engineering.
 Hint for RH:
All interplanetry spacecraft are equipped with transponders.
These devices respond to an incoming radio pulse by responding
with a reply pulse, with a known delay.
The replies are of course detected routinely,
and measured delays are used for orbit calculation and navigation.

 THE ABOVE COMMENT SUITS BETTER COMING FROM A KNOW-IT-ALL CHARLATAN.
YOU ARE SO WRONG AND MISINFORMED THAT MAKES ME CRY.

 Please do, you will be in need of lots of crying.
 [snip ALL CAPS]

Yes. It seems that rhertz has learned from Donald J. Trump that putting stuff in ALL CAPS will make readers take it more seriously. It has the opposite effect on me: I just skip over sections in ALL CAPS without reading them.

 

Final hint: The Parker near solar probe for example
would be hopelessly lost if Shapiro delay on its signals
wouldn't be taken into account correctly.
While you whine about it the mission engineers who fly the thing
routinely take it into account without even giving it another thought,
 Jan

[snip more ALL CAPS]
 

THE USE OF TRANSPONDERS HAS BEEN OF COMMON USE IN SPACECRAFTS, ROCKETS,
DEEP SPACE SONDES, ETC., SINCE THE SPAGE AGE COMMENCED, AND IS UNRELATED
TO SHAPIRO'S DELAY. IT'S A MATTER OF COMMON SENSE IN RADIO ENGINEERING.

 Not really, the first sats didn't have one.
The point is that having transponders in interplanetary probes
reduces the uncertainty in positions of all bodies
at least a thousandfold, to typically hundreds of meters.
So while you are still whining about what may have been wrong
with the original Shapiro experiment (nothing)
correctly taking gravitational delays into account
has long since been a routine engieering matter
in interplanetary navigation.
 There just is no way to ignore it
and still arrive at correct orbit predictions,
 Jan

--
Athel -- French and British, living in Marseilles for 37 years; mainly in England until 1987.