Exam #2 Flashcards
What is the surface temperature of the sun?
5778K
What is the average distance of the earth from the sun?
150,000,000 km
What is the most dense region of the lonosphere?
F-2
What is the average solar flux at 1AU?
1350 W/m^2
What is the average solar cycle
11 years
What is the radius of Earth?
6378 km
What are the Van Allen belts?
an area within the earths magnetosphere containing concentrations of trapped charged particles
List three types of electrical power sources.
- chemical
- solar
- nuclear
What is the ideal rocket equation?
∆V = Ispgoln(initial mass/ final mass)
What is solar wind?
a continuous outflow of charged particles emanating from the solar surface at 300-700 km/s
What is a coronal mass ejection?
a discrete event in which large amounts of charged particles erupt from the solar surface
Fill factor
% of max theoretical power achievable by the solar panel
inherent degredation
exists when solar cells are first installed
combined assembly, fill factor and shadowing effects
EIRP
term for PtGt (with no line losses included)
Packing factor
% of total solar panel area that is useful for producing power
Stefan-Boltzman law
can be used to determine the power / area gien off by an object
Max earth central angle
angle determine by cos
Earth angular radius
angle determined by sin
Signal to noise ratio
a term for an equation, a very big complicated equation.
Wein’s displacement law
can be sued to determine the peak radiation wavelength on an object
Total dose effects
long term damage to the crystal structure of semiconductors cause by charged particles
life degradation
solar cell performance decrease per year caused primarily by the space radiation environment
Sputtering
similar to sand blasting but on the spacecraft by space particles
