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Flashcards in Satalite Principles Deck (12):
0

First uk military satellite

Sky net 1969

1

Why have satellites

Meteorological
Photo/Surveilence
Broadcast
Nav
Comms
Which orbit will depend on the job of the satellite

2

Sync
Ascnc orbit

Synchronous orbit locked in tandem with the earths rotation

3

GEO orbit

22223 miles

4

Azmith card dotted and solid line

Dotted elevation
Straight bearing

5

LEO
MEO
HEO
GEO
PEO

LEO-80-1200 miles
MEO-1200-1800 miles
HEO-1800-22223 miles
These are asynchronous

GEO-22223-synchronous
PEO-LEO goes from S-N - ascnchronous

6

GPS TX freq

1575.42mhz

7

Spot beam
Broad beam

Spot beam is a concentrated beam focused on a small area
Broad bean covers a large area

8

Military strategical satellite

7.25ghz-8.4ghz

9

Military tactical satellite

240-320mhz

10

Azimuth card

Bearing and elevation of antenna to satellite

11

Advantages/disadvantages of GEO

Ad- provides constant coverage
Requires fewer satellites
Less susceptible to drag

Dis-propogation loss is high
Cannot provide polar coverage