New method would be cheaper and simpler than astronomical measurements
Giant laser gyroscope detects Earth's wobble
Laser gyroscope measures the Earth's 'wobble' – Physics World
A new tool shows tiny changes in the '24-hour' length of a day
Laser gyroscope precisely tracks the Earth's rotation
New High Precision Chip-Based Laser Gyroscope Can Measure Earth's
Buried lasers will sense Earth's spin and quakes doing the twist
Earth rotation measured by a chip-scale ring laser gyroscope
Variations in the Earth's rotation rate measured with a ring laser
Earth rotation measured by a chip-scale ring laser gyroscope
Understanding high-performance gyros and gyrocompassing · VectorNav
Direct measurement of diurnal polar motion by ring laser
Gravitational Waves
A new tool shows tiny changes in the '24-hour' length of a day
Earth rotation measured by a chip-scale ring laser gyroscope