Trolling motors calibrate speed more accurately than large outboard motors. Users must calibrate CGM devices with traditional blood glucose measurements. The radiotracer dilution method is used to calibrate open channel flow measurements. It is also used to calibrate measurements from weather satellites. The properties of pure iron are often used to calibrate measurements or to compare tests. Thomson used data published by Regnault to calibrate his scale against established measurements. They are also easy to calibrate and provide very accurate readings. This equation is used to calibrate thermistors. The curve used to calibrate the results should be the latest available INTCAL curve. When using direct alignment methods one might first calibrate one's images to get better results. Sundials were used to calibrate water clocks. Conversely, in the NDA, pilots calibrate their altimeters to regardless of the actual atmospheric pressure. The mathematical simulations which they calibrate are called radiation flow hydrodynamics codes, or channel codes. The standard used to calibrate the calculation is 1 gram of capsaicin. This formula can be used to calibrate a water clock.