Looking forward, I found one of the issues in comparing OpenRocket to RASAero, it deals with air pressure. In RASAero, if you leave the pressure field blank, then RASAero calculates the air pressure internally (using inHg as the unit of measure). Regardless of the unit of measure being used, OpenRocket appears to round to the nearest integer while RASAero allows two additional digits of precision for entered data. So, the first air pressure issue is a rounding error. 101568 pa (29.99 in-Hg) to 101620 pa (30.01 in-Hg) in OpenRocket rounds to 30 in-Hg. So, there is no way to match the OpenRocket in-Hg value to the two-digit more precise value for in-Hg in RASAero. The precision in OpenRocket needs to be increased to 2 decimal points to increase comparability and to increase compatibility as we move to a RASAero export feature; the same is true for temperature.