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Flashcards in L_4 Deck (18):
1

troposphere

sea level up to about 10 km

2

stratosphere

10 km to 50 km

3

mesosphere

50 km and 80 km

4

thermosphere

above about 80 km

5

weather occurs mainly in this region of the atmosphere

troposphere

6

stratosphere temperature

characterized by a temperature plateau around 220 to 230 K

7

mesosphere temperature trend

becomes colder with altitude

8

thermosphere temperature trend

temperature rises fast with altitude

9

ozone layer

18 to 25 km

10

homosphere definition and altitude range

constant composition

0 to about 100 km altitude

11

heterosphere

changing composition of atmosphere

above 100 km

 

12

Average altitude ranges and temperatures provided in previous cards:

What are the actual dependencies for them?

geographical latitude

seasons

atmospheric tides

sun-spot activities

13

U.S. standard atmosphere temperature at sea level

15 °C

14

large density fluctuations can occur in this altitude range providing large impact to aero and aerothermal performance

60 to 80 km altitude range

15

in-flight data to capture for vehicle performance understanding

pinf

Tinf

rho_inf

vehicle speed relative to local air

16

turbo propulsion approximate Mach and velocity

up to about Mach 3

(velocity about 1 km/s)

17

ram-jet approximate Mach and velocity

about 3 < Mach < 7

about 1 km/s < velocity

18

scram-jet propulsion approximate Mach and velocity

about 4 < Mach < 12 to 14

about 1.2 km/s < velocity < 4 to 4.5 km/s