A facility to test the linearity and drift of heterodyne laser metrology gauges for measuring distances of 1 to 7 meters with 10 picometer repeatability is described.

metrology space interferometry mission interferome↗

NASA NTRS2001

Wavefront versus amplitude division high precision displacement measuring interferometers

We discuss and compare different methods to reduce periodic nonlinear error and improve thermal stability. Experimental results will be presented and discussed.

metrology laser interferometers↗

NASA NTRS2001

Characterization of Picometer repeatibility displacement meteorology gauges

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metrology space interferometry mission interferome↗

NASA NTRS2000

Progress towards picometer accuracy laser metrology for the space interferometry mission

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interferometer metrology astrometry↗

NASA NTRS1995

A serach for moderate- and high-energy neturino emission correlated with gamma-ray bursts

A temporal correlation analysis between moderate- (60 Mev less than or equal to E(sub nu)greater than or equal to 2500 MeV) and high-energy (E(sub nu) greater than or equal to 2000 MeV) neutrino interactions consist of two types: the moderate-energy interactions that are contained within the volume of IMB-3 and the upward-going muons produced by high-energy nu(sub mu) interactions in the rock around the detector. No evidence is found for moderate- or high-energy neutrino emission from GRBs nor for any neutrino/neutrino correlation. The nonobservation of nu/GRB correlations allows upper limits to be placed on the neutrino flux associated with GRBs.

Becker-Szendy, R.↗