Temp, Humidity, Elevation, Barometric Pressure information

[Rhansen]

DA Calculator is up....

http://www.dragtimes.com/da-density-...calculator.php
[/b]

just a side note, you need to know if the baro reading is "corrected" (need elevation input) or "absolute" (don't need elevation input) or else your numbers will be off.

see: http://findarticles.com/p/articles/mi_qa40...ag=artBody;col1

Calculators and PC software can be used to combine a track's elevation with a "corrected" barometer to get pretty close to the local ambient pressure; however, I don't recommend this method because either one of the other pressure-measurement tools described below are so readily available and affordable.
...
In part 1, I gave the definitions of "actual" versus "corrected" barometric pressure. "Corrected" barometer readings come from weather-service bureaus (TV, radio, airport flight operations, Internet) and are not of much use for motorsports (see track elevation above). I see barometer readings on the Internet all of the time that are clearly a "corrected" barometer but not labeled as such. Recently, NHRA.com reported a barometer of 30.19 in Hg for Phoenix - very misleading because Phoenix is not below sea level but rather about 1,200 feet in elevation! It was cold and bright and not a cloud in the sky that day - just great weather conditions representative of high pressure.

If you're going to use a barometer for motorsports, you must have an "absolute" barometer. The digital barometers included in most modern weather stations (CompuTech, PerformAIRE, Altronics, Davis Instruments) are all "absolute" barometers and will work just fine. [/b]

[BMan1113VR]

I like the new feature, except it doesn't work to well for track altitudes....I was checking LACR which is 2710ft and it said that LACR was 267 ft thus leading to a couple negative DA's

[j_evo2003]

Yeah the track elevations are not all correct. For instance Cecil County of Maryland is being reported as 28ft elevation. Correct elevation is 325ft.

thanks, lacr was missing a 0, and I fixed cecil as well.....

let me know if you see any others.....

thanks...

[BMan1113VR]

thanks, lacr was missing a 0, and I fixed cecil as well.....

let me know if you see any others.....

thanks...
[/b]

I'll look around