10.Space Tech

Orbits

1. Shape of Geostationary orbit

1. Circle

Apogee vs Perigee

farthest vs nearest point

Orbits based on direction

geosynchronous orbit (part of MEO) vs Polar orbit/ Sun synchronous orbit

1. Orbit orientation

2. Application

1. Equatorial plane vs Vertical plane

2. Communication, Navigation vs Earth Observation vs Remote sensing

Orbits based on distance

1. Near earth orbit (subset of LEO)

2. LEO

3. MEO

4. HEO

5. Types of MEO

1. 400 - 800 Km

2. 0 - 2000 Km

3. a

4. a

5. Geosynchronous(35.7K Km) but it orbits at an angle and Geostationary orbit (35.7K Km) - so geostationary is a subset of geosynchronous

Application of

1. LEO

2. MEO

1. - Earth observation
   - Telescope (to observe universe)(near to repair any issue)
   - Space stations (to repair)

2. Navigation systems
   - GPS (NAVSTAR) = USA
   - GLONASS = Russia
   - Galileo = European Union
   - BEIDOU = China
   - NAVIC-IRNSS (regional)
   - QZSS = Japan (regional)

1. Which countries are part in ISS

2. China’s Own station

1. USA, Russia, ESA, Japan, Canada

2. Tiangong

NAVIC-IRNSS

1. No of satellites and types

2. Coverage

3. Resolution

4. Is integrated with phones?

1. 7 = 4 Geosynchronous + 3 Geo stationary

2. India + 1500km

3. 10 meters

4. Yes, in Qualcom, Apple etc

GPS are at

1. Distance

2. Time for completiton of one round

1. 20,200

2. 12 hours (half sync)

What is trilateralisation

It is the method by which the 4 satellites use the data from their satellites to locate the location