FlightStream expects units for all inputs, and by default the AIM uses SI units, i.e.

• mass : kg
• length : meter
• time : seconds
• temperature : K A unit system may be optionally specified during AIM instance initiation to use a different set of base units. A unit system may be specified via a JSON string dictionary for example: unitSys = "{"mass": "lb", "length": "feet", "time":"seconds", "temperature": "R"}"

JSON String Dictionary

The key arguments of the dictionary are described in the following:

• mass = "None"
  Mass units - e.g. "kilogram", "k", "slug", ...

• length = "None"
  Length units - FlightStream support: "inch", "millimeter", "feet", "mile", "meter", "kilometer", "mils", "micron", "centimeter", "microinch"

• time = "None"
  Time units - e.g. "second", "s", "minute", ...

• temperature = "None"
  Temperature units - e.g. "Kelvin", "K", "degC", ...