Hi,I'm having some troubles with the temperature displayed on the TAT indicator, when climbing and level on cruise it seems that displayed temperature is higher and does not match the standard rate, for example at ground the TAT shows 10ºC or 13ºC and flying at 6500 or 7500 feet it shows 15ºC or 17ºC.I tested without ASE usuing FSX weather engine and this does not happen, I have not tried higher altitudes yet because most of the times I fly small GA airplanes.ASE build is 642, smooth cloud transition weather depiction, with most of the settings default and using latest FSUIPC for wind smoothing purposes.Could someone tell me if this has been experienced or give me a hint of how to correct this?ThanksPedro L. Paz

Have you gone into the ASE weather engine and checked you are actualy not running into an inversion at your location?Cheers,- jahman.

Hi,I'm having some troubles with the temperature displayed on the TAT indicator, when climbing and level on cruise it seems that displayed temperature is higher and does not match the standard rate, for example at ground the TAT shows 10ºC or 13ºC and flying at 6500 or 7500 feet it shows 15ºC or 17ºC.I tested without ASE usuing FSX weather engine and this does not happen, I have not tried higher altitudes yet because most of the times I fly small GA airplanes.ASE build is 642, smooth cloud transition weather depiction, with most of the settings default and using latest FSUIPC for wind smoothing purposes.Could someone tell me if this has been experienced or give me a hint of how to correct this?ThanksPedro L. Paz

Pedro, TAT is not the outside air temp, it's the temp of the probe. The faster the aircraft moves the higher the TAT. You should be looking at the OATRegards

The OP said he flies GA aircraft, where low speed do not cause TAT to rise above OAT. (Hint: Mach number is a part of the TAT formula...)Cheers,- jahman.

The OP said he flies GA aircraft, where low speed do not cause TAT to rise above OAT. (Hint: Mach number is a part of the TAT formula...)Cheers,- jahman.

Is correct, as a matter of fact without ASE engine the temperature changes seems to be according different altitudes. (tested with the same airplane, same TAT indicator)Yesterday I was flying around Athems, Georgia, at ground the temperature was around 1ºC and at 5500 feet it was the same, the airplane was a Carenado C172N.Rgds,Pedro L. Paz

Is correct, as a matter of fact without ASE engine the temperature changes seems to be according different altitudes. (tested with the same airplane, same TAT indicator)Yesterday I was flying around Athems, Georgia, at ground the temperature was around 1ºC and at 5500 feet it was the same, the airplane was a Carenado C172N.Rgds,Pedro L. Paz

Sounds great, but remember the C-172 is rather sub-sonic for the most part :-) so it sports an OAT - Outside Air Temperature gauge rather than a TAT - Total Air Temperature probe.BTW, did you go into the ASE weasther engine to check the temperature vs. altitude that ASE is sending to FSX?Cheers,- jahman.

Sounds great, but remember the C-172 is rather sub-sonic for the most part :-) so it sports an OAT - Outside Air Temperature gauge rather than a TAT - Total Air Temperature probe.BTW, did you go into the ASE weasther engine to check the temperature vs. altitude that ASE is sending to FSX?Cheers,- jahman.

Thanks jahman,How can I check the temperature vs altitude that ASE is sending?Rgds,Pedro L.Paz

Thanks jahman,How can I check the temperature vs altitude that ASE is sending?Rgds,Pedro L.Paz

Sorry, I was able to find the temperature information.ThanksPedro L. paz

I have also noticed some temperature problems lately.I was flying into ENCN where the METAR was giving -17. Whilst on approach at 3000ft I had a temperature of -2.This seems to be standard on my flights lately. Either there are a lot of temperature inversions going on (and I mean every flight), or there is a bug.Neil

...I was flying into ENCN where the METAR was giving -17. Whilst on approach at 3000ft I had a temperature of -2....

-17 at what altitude? Standard Atmosphere temperature lapse rate for dry air is -2 ºC/1,000 ft, so for (-17ºC - -2ºC) = 15 ºC lower temperature you need to be 7,500 ft higher.Cheers,- jahman.

Neil,At 3000 it still would be from the data in ASE not from the METAR. Also we are reporting OAT and FS is usually reporting TAT, which is always higher, and -2 is higher than -17.