Quiz 2 Flashcards
What are the layers of the atmosphere? (Lowest to highest)
Troposphere, Stratosphere, Mesosphere, Thermosphere
What are the Ionospheric layers?
D, E, F1, F2
Characteristics of the Troposphere?
- Most clouds
- Thinner at the poles
- About 11km thick
- Temp Decreases
Characteristics of the Stratosphere?
- 11-48km above earths surface
- Atmosphere is the ozone layer, absorbs most harmful ultraviolet radiation from the sun
- Highest temperature is about 0 C
- Increases (Ozone absorbs UV)
Characteristics of the Mesosphere?
- Temperature decreases with altitude
- About -90C at top
- Atmosphere is rarefied
- Decreases (Coolest)
Characteristics of the Thermosphere?
- Starts at about 55 km
- Temperature is quite hot (Hottest)
- Not measured using thermometer
- As high as thousands of degrees
What is the approximate height of D Ionospheric layer?
Altitude 60-90km
What is the approximate height of E Ionospheric layer?
Altitude 90-140km
What is the approximate height of F1 Ionospheric layer?
Altitude 140-200km
What Ionospheric layer decays at night?
D and E
What produces ionization?
Solar radiation and energetic particles
What are ionization loss methods?
Charge particles come back together to make neutral particles
How does density change in a hydrostatic atmosphere?
Density decreases as it goes up the atmosphere
What is hydrostatic atmosphere?
Fluid is at rest or when flow velocity at each point is constant over time
What is the chapman layer formation?
- Number of photons is largest at top of ionosphere and decreases with decreasing altitude
- The number of neutrals is largest at the bottom of the atmosphere and decreases with increasing altitude
- Combining two profiles gives profile of the chapman layer
How is the Aurora Formed?
Energetic particles from magnetosphere or sun come and interact with the atmospheric gases giving them energy and the energy is then released in the form of light
fcritical?
Critical frequency will be perfectly reflected
f < fcritical?
When you have a frequency less then critical frequency we have a complete reflection
f > fcritical?
When frequency is greater the light can pass through it
What are the Different satellite orbits?
Low Earth Orbit (LEO), Medium Earth Orbit (MEO), Geostationary Orbit (GEO), Highly Elliptical Orbit (HEO)
What is atmospheric drag?
The friction between an object and the atmosphere as the object moves, atmospheric drag is reduced as altitude and temperature increases because density of air is reduced at higher altitude and temperatures
What are the radiation effects on satellites?
- Surface Charging
- Deep Dielectric Charging
- Single event upsets
- UV Degration
What is Faradays law of induction?
- Known as electromagnetic induction
- Change in the magnetic environment of a coil wire will cause voltage to be induced in coil
What is the keplars law of planetary motion?
1) The law of orbits
2) The law of areas
3) The law of periods
What is the center of mass?
Center of mass is the point that is weighted average of distribution mass for that object
