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Analog Angle

When a Sensor Is Truly In “The Twilight Zone”

Bill Schweber
Bill_Jaffa
Bill_Jaffa
5/31/2017 5:40:48 PM
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Re: single-photon detector
Yes, and there are likely relativistic effects to work into it as well, as the space-time fabric curves due to gravity of nearby objects, plus time dilation is an issue. If we did not know of the many corrections that have to be made to LEO GPS satellite orbit info and data due to general relativity, the results would be off by many miles; imagine the corrections which have to be made at the Earth-to-object distances and velocities NASA is aiming for here.

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Victor Lorenzo
Victor Lorenzo
5/30/2017 8:56:56 AM
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single-photon detector
Thanks for this blog, Bill, it is very interesting. I wonder how will they manage to aim the lasers at such a long distance. It should be a "constant" aiming, both laser ends are moving targets and light takes a non-negligible time for traveling that distance.

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