Tom Sheet Flashcards
1
Q
Keppler’s Laws
A
All planets move in elliptical orbits, with the sun at one foci
An imaginary line joining a planet and the sun sweeps out an equal area of space in equal amounts of time.
2
Q
Shape of Earth
A
Oblate spheroid, 1:298 compression ratio
3
Q
Capricorn
A
23.5S
4
Q
Cancer
A
23.5 north
5
Q
Arctic Circle
A
66.5N
6
Q
Antarctic Circle
A
66.5S
7
Q
Angle of Inclination of the Earth
A
23.5
8
Q
Aphelion
A
Furthest away, slowest speed - July
9
Q
Perihelion
A
Closest, fastest speed - January
10
Q
Greatest time difference occurs
A
Between the two equinoxes
11
Q
Sunrise
A
Upper Limb of Sun breaks the horizon
12
Q
Sunset
A
Upper Limb drops below the horizon
13
Q
Dusk
A
Centre of the sun 6 degrees below the horizon
14
Q
Direct Mercator
A
conformal
- scale expands away from the equator equally
- No chart convergence
- Rhumb lines are straight
- GC are concave to the equator
15
Q
Lamberts Conformal
A
scale is considered to be correct across the chart
- scale decreases inside the standard a parallels
- scale increase outside of the standard parallels
- Rhumb lines are concave to the pole
- Great Circles are straight - sort of concave to the parallel of origin technically
- convergence = sin of the parallel of origin
