function getInstrumentAttitude(scAttitude, timeStamp) result(instrumAttitude)
real(double), intent(in) :: timeStamp
type(SpacecraftAttitudeType), intent(in) :: scAttitude
type(SpacecraftAttitudeType) :: instrumAttitude
end function getInstrumentAttitude
NOTE this function requires the cal to have been set to the correct instrument before the call.