I'm using the SCP1000 sensor (ASIC revision C) on my Autopilot and have noticed that the pressure on it changes constantly during the day The change is also gradual and not noisy. I've attributed this to the change in pressure due to temperature changes as the air warms up and cools down, but I could be wrong.
Is there a way to convert this pressure to an altitude measurement that takes into account the current temperature? All the equations I have found reference the sea level temperature. I assume that as the day progresses, the sea level temperature changes. Is there a way to reflect this in the altitude calculation and therfore obtain a steadier result?