48 citations · 104 across the 14 of their papers we have counts for
6 papers · 1 filter
A null test of General Relativity: New limits on Local Position Invariance and the variation of fundamental constants
Neil Ashby, Thomas E. Parker, Bijunath R. Patla
We compare the long-term fractional frequency variation of four hydrogen masers that are part of an ensemble of clocks comprising the National Institute of Standards and Technology…
Isosynchronous paths on a rotating surface
Neil Ashby
In special relativity, clock networks may be self-consistently synchronized in an inertial frame by slowly transporting clocks, or by exchanging electromagnetic signals between net…
Why there is no noon-midnight red shift in the GPS
Neil Ashby, Marc Weiss
Although the effects of solar (and lunar) gravitational potentials on the frequencies of orbiting Global Positioning System (GPS) clocks are actually no more than a few parts in 10…
Optical Clock and Drag-Free Requirements for a Shapiro Time-Delay Mission
Neil Ashby, Peter L. Bender
In the next decade or two, extremely accurate tests of general relativity under extreme conditions are expected from gravitational wave observations of binary black hole mergers wi…
Accurate light-time correction due to a gravitating mass
Neil Ashby, Bruno Bertotti
This work arose as an aftermath of Cassini's 2002 experiment \cite{bblipt03}, in which the PPN parameter was measured with an accuracy and found consis…
The effect of the motion of the Sun on the light-time in interplanetary relativistic experiments
B. Bertotti, N. Ashby, L. Iess
In 2002 a measurement of the effect of solar gravity upon the phase of coherent microwave beams passing near the Sun has been carried out with the Cassini mission, allowing a very…