Mammatus

No, it's not fixed.... The proof is that he is at -47c at 11000m at ISA+10. "Quote" 1) Temperature set to 25C(surface) in mission editor(ISA+10). 2) Temperature set to 15C(surface) in mission editor(ISA). 3) Temperature set to 0C(surface) in mission editor(ISA-15). Resulting temperature readout from a-10C at 11000m: 1) -47C 2) -57C 3) -57C (the issue) "End of Quote" 1- He is at -47C at 11000 and not at the tropopause temp of -57C because he is not yet at the tropopause. Tthe temperature is higher (ISA+10) and consequently, the tropopause is higher too... He should have climb a little bit more to reach the tropopause and the -57C. 2- He is right at the tropopause, 11000m, 57C and ISA temp 3- He is at -57C like number 2 because he is probably over the tropopause (the area where the temp remain constant). The temperature is below ISA (ISA-15) so the tropopause is below 11000. He should have reached -57C well below 11000m. So tropopause is not fixed and seems to be very well modeled!!!!

Earth atmosphere is a lot more complicated than just saying it will loose 2 degrees Celcius / 1000ft... At a certain point, the air temperature will stop to decrease with altitude. This is the tropopause, the boundary between the troposphere and the stratosphere... Going higher in the stratosphere, the temperature will even begin to increase. I do agree with you that real atmosphere is far from being static. The tropopause height will change according to many different factors... Actually, the colder it is, the lower will be the tropopause. Generally, it will be also be lower at the earth pole than at the equator. More locally, the height of the tropopause could also vary with low/high pressure systems and even with the amount of humidity in the air below it... Consequently, you will always have a point where the temperature will stop decreasing (at the tropopause). This temperature of 56,5 deg Celcius is a mean value, but you will always have this point, at about plus or minus 10 deg Celcius (so about -55 to -65), where an increase/decrease of altitude will not result in any temperature change. And assuming that lowering to ISA -15 like you did will result to lower temperature at tropopause is false. First because if temperature is lower, tropopause will also be lower and youll consequently reach this point where temperature remain constant faster while climbing... Inversely, when its warmer than ISA, tropopause will be higher, so you can climb higher before reaching the tropopause. That partially explain why whatever temperature you have on the ground, the temperature will aways be somewhere -56,5C at the tropopause. In fact, the coldest temperature that you can have at the tropopause will be over or near the equator, where the temperature is hotter and consequently, the tropopause higher... This is confirmed by the wedsite that you posted (NOAA). Look at higher altitude, you will see that the coldest temperature at those altitude are those that are further South of the map... So basically, -56 is a mean value, for a point somewhere between the equator and an earth pole with standard temperature (at ISA). But at the end, you will always have a point close to this -56,5C where temperature will remain constant with any altitude variation, and thats what you are seeing in DCS. Pretty sweet that the devs have modelled this...

Not a bug.... Real life stuff!!!! ;-) Environmental lapse rate[edit] The environmental lapse rate (ELR), is the rate of decrease of temperature with altitude in the stationary atmosphere at a given time and location. As an average, the International Civil Aviation Organization (ICAO) defines an international standard atmosphere (ISA) with a temperature lapse rate of 6.49 K/km[15] (3.56 °F or 1.98 °C/1,000 ft) from sea level to 11 km (36,090 ft or 6.8 mi). From 11 km up to 20 km (65,620 ft or 12.4 mi), the constant temperature is −56.5 °C (−69.7 °F), which is the lowest assumed temperature in the ISA. The standard atmosphere contains no moisture. Unlike the idealized ISA, the temperature of the actual atmosphere does not always fall at a uniform rate with height. For example, there can be an inversion layer in which the temperature increases with altitude.

Generally yes, but 1070 is a completely new technology, new architecture... The improvement from 970 to 1070 is quite significant!!! in the order of 50-70% more fps, depending of the game! Look at the benchmark, quite impressive the performance difference in only 1 generation... So thats not that "ridiculous"! ;-)

970 is still a pretty good graphic card! DCS is very memory hungry so if you can do only 1 upgrade, if I was you, I would add another 8gb of RAM instead!!! If you have money for both (RAM and 1070), then why not... 1070 is performing like a 980ti, so you should see a few fps more!!! ;-)

count me in! Lonewolf Callsign: Mammatus Prefered Aircraft: SU-25T any side!