[time-nuts] A small piece on HP's hydrogen maser in 1968

Poul-Henning Kamp phk at phk.freebsd.dk
Tue Feb 25 07:46:26 UTC 2014


> [Jim Lux]
> Wasn't that Gravity Probe B.. which finally launched in 2004, and had 
> equivocal results.

No, GPB was the gyro-experiment, it tested another part of GR than
red shift was supposed to.

> [Tony Greene]
> In the back of my head, I beleive that project red shift did fly,
> but they dumped the hydrogen masers to use brand new lighter weight
> and much smaller rubidiums.

I've found no trace of it.

Are you sure you are not confusing it with the pathfinders for NavStar ?

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