Assume ground air temperature is 15`C
our rocket with a 22RMB BMP085 pressure sensor can reach about 6km.
XXXXXXXXXXXXXXXXXXXXXXXXXXX/wikipedia/commons/9/9d/Comparison_US_standard_atmosphere_XXXXXXXgfrom the image above, or use numerically simulation, we know that temp. at 6km altitude can be about -20`C
for BMP085 it's +-4hPa pressure meas. error
1. i think a rocket which can reach 6km or more don't need to save ~25RMB for a better pressure sensor
2. rockets are fast enough so temp. drop will take longer time.
3. no need to worry about slow changing pressure because it's not high frequent noise which can cause parachute opening error.
rocket usually have more one hundred meter per sec or higher velocity, pressure decreasing rate can be about 10hPa/s. cooling need few sec. or more because sensor is protected by STP tube and outer case. besides, total error can only be 8hPa max.
if the guy above cannot read english smoothly, the better way is to learn english hard, not using web tricks. poor of basis knowledge can mislead you a lot
" 感谢 应试教育 培养了我的基础 " --do you really think so ?
