degree per hour
Angular speedexact by definition
The degree per hour is π/648000 rad/s, about 4.848 × 10⁻⁶ rad/s. It is the standard unit of gyroscope bias: a navigation-grade gyro drifts under 0.01 °/h, a tactical-grade one 1 to 10 °/h, and a consumer MEMS gyro hundreds.
Watch out: Bias is only one error term. Angle random walk, quoted in degrees per square root of hour, and bias instability are separate specifications, and a gyro compared on drift alone is being compared on a third of its behaviour.
| 1 | 0.0000048481368 |
The scale is set by the Earth itself, which rotates at 15.041 °/h. A gyro good enough to sense that rate can find true north without any external reference, which is what gyrocompassing is, and it is why 15 °/h is the natural dividing line between grades of instrument.
One degree per hour in every angular speed unit
| 1 | degree per hour (°/h)this unit | |
| 0.0666667 | revolution per day (rev/d) | |
| 0.0166667 | degree per minute (°/min) | |
| 0.00484814 | milliradian per second (mrad/s) | |
| 0.00277778 | revolution per hour (rev/h) | |
| 0.000290888 | radian per minute (rad/min) | |
| 0.000277778 | degree per second (°/s) | |
| 0.0000462963 | revolution per minute (rpm) | |
| 0.00000484814 | radian per second (rad/s) | |
| 7.71605e-07 | revolution per second (rev/s) | |
| 4.62963e-08 | thousand revolutions per minute (krpm) |