550 bb track results!

My new weather station, RaceAir Pro gives out two different alltitudes for weather. The first one i saw was Perf Altitude Density. 2427 on one test. I took this number to be Density Altitude. Then i scrowled down and found DENSITY ALTITUDE, or DA as most of us know it. Perf Altitude density readings are about 75 percent of DA readings! So actual DA readings, the reading many of us are used to, were higher by about 30 percent than i thought! The correction factor uses the same info as perf density for its calculation. It shows an et of 8.704 at sea level versus 8.854 actual at 1.0884 correction factor.