DOUBLE PRECISION FUNCTION AR03AA(G,D,IERR) DOUBLE PRECISION G, D INTEGER IERR
Compute pressure factor based upon density factor 
.
| Argument | Intent | Description |
| g | in | Specific heat constant |
| d | in | Density fraction |
| ierr | out | (optional) Return status code. |
Specific heat ratio 
.
Given 
out of range.
Return Value
Pressure fraction 
or NAN on error.
. 
.