Tom Roberts and Reality.

Extract from http://en.wikipedia.org/wiki/Huygens_probe

A critical design flaw resolved

Long after launch, a few persistent engineers discovered that the
communication equipment on Cassini had a potentially fatal design flaw,
which would have caused the loss of all data transmitted by Huygens.
Since Huygens was too small to transmit directly to Earth, it was designed
to transmit the telemetry data obtained while descending through Titan's
atmosphere to Cassini by radio, which would in turn relay it to Earth using
its large 4-meter diameter main antenna. Some engineers, most notably ESA
Darmstadt employees Claudio Sollazzo and Boris Smeds, felt uneasy about the
fact that, in their opinion, this feature had not been tested before launch
under sufficiently realistic conditions. Smeds managed, with some
difficulty, to convince superiors to perform additional tests while Cassini
was in flight. In early 2000, he sent simulated telemetry data at varying
power and Doppler shift levels from Earth to Cassini. It turned out that
Cassini was unable to relay the data correctly.[citation needed]
The reason: under the original flight plan, when Huygens was to descend to
Titan, it would have accelerated relative to Cassini, causing the Doppler
shift of its signal to vary. Consequently, the hardware of Cassini's
receiver was designed to be able to receive over a range of shifted
frequencies. However, the firmware failed to take into account that the
Doppler shift would have changed not only the carrier frequency, but also
the timing of the payload bits, coded by phase-shift keying at 8192 bits per
second.[citation needed]
Reprogramming the firmware was impossible, and as a solution the trajectory
had to be changed. Huygens detached a month later than originally planned
(December 2004 instead of November) and approached Titan in such a way that
its transmissions traveled perpendicular to its direction of motion relative
to Cassini, greatly reducing the Doppler shift.[14]
The trajectory change overcame the design flaw for the most part, and data
transmission succeeded, although the information from one of the two radio
channels was lost due to an unrelated error.[citation needed]
The trajectory change was not the only mitigation to the Doppler shift
problem, and software patches were uplinked to several instruments on the
probe from the Deutsche Aerospace facility in Darmstadt to further reduce
the risk of data loss.[citation needed]

The babbling imbecile Tom Roberts' version:
If A and B are in space ships, and all they have are in those ships, then
they
cannot garner sufficient information to MEASURE their relative speed. This
OUGHT
to be obvious. If they are able to use telescopes and radar to measure their
relative velocity, or have comoving assistants along the other's trajectory,
then they could make predictions about time durations measured by the
other's
clock relative to their own clock [#]. And if A and B can send clock signals
to
each other, they can directly deduce intervals on each others' clocks [#].

[#] But they must be cognizant of the effects of different inertial
frames on measuring time intervals.
-- Tom Roberts

It OUGHT to be obvious the lunatic needs psychiatric help.

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