I am studying instrumentation of NASA's Orion spacecraft, and there is a readout for V1 (I am assuming this is the "first orbital velocity", for circular orbit), and it seems to be in small decimals. I am assuming this is a fraction of the current velocity to the needed velocity for the orbital speed. When a circular orbit is reached, this value will read 1.0.
In order to calculate this, I am assuming the V1 is calculated using the value of the current apogee (which is constantly increasing during the launch) and as the rocket trajectory changes, rocket catches up with apogee, rocket's speed reaches V1, and the value closes to 1.0.
The NASA video Orion Cockpit Feature shows the Orion instrumentation. The readout in question is at
01:10, upper left corner, a small box showing a value of
0.03 with the label "VI" above it.
Are my assumptions correct?