Low-Earth Orbit (LEO) क्या है?
ऐतिहासिक पृष्ठभूमि
मुख्य प्रावधान
5 points- 1.
Altitude Range: Generally defined as 160 km to 2,000 km above Earth.
- 2.
Orbital Period: Satellites in LEO have orbital periods ranging from 88 minutes to 127 minutes, meaning they complete an orbit around Earth relatively quickly.
- 3.
Advantages: Lower Launch Energy (requires less fuel), High Resolution Imaging (for Earth observation), Reduced Communication Delay, and suitable for Human Spaceflight (lower radiation, easier resupply).
- 4.
Disadvantages: Limited Coverage (requires constellations for global coverage), experiences residual Atmospheric Drag (needs re-boosting), and increasing Space Debris congestion.
- 5.
Applications: International Space Station (ISS), Hubble Space Telescope, most Earth observation satellites (e.g., IRS series), communication satellite constellations (e.g., Starlink, OneWeb), and human spaceflight missions (e.g., Gaganyaan).
दृश्य सामग्री
Earth Orbits: LEO vs. MEO vs. GEO
This table compares the characteristics, applications, advantages, and disadvantages of Low-Earth Orbit (LEO) with Medium-Earth Orbit (MEO) and Geostationary Earth Orbit (GEO), providing a comprehensive understanding of satellite orbits.
| Feature | Low-Earth Orbit (LEO) | Medium-Earth Orbit (MEO) | Geostationary Earth Orbit (GEO) |
|---|---|---|---|
| Altitude Range | 160 km - 2,000 km | 2,000 km - 35,786 km | 35,786 km |
| Orbital Period | 88 - 127 minutes | 2 - 12 hours | 23 hours 56 minutes 4 seconds (matches Earth's rotation) |
| Key Applications | ISS, Hubble, Earth observation (IRS), Communication constellations (Starlink, OneWeb), Gaganyaan | GPS, Galileo, Glonass (Navigation systems) | Communication (TV, Internet), Meteorology (INSAT), Early Warning |
| Advantages | Lower launch energy, high resolution imaging, reduced communication delay, suitable for human spaceflight | Better coverage than LEO, less delay than GEO, stable for navigation | Constant coverage of a large area, no tracking required from ground, stable position |
| Disadvantages | Limited coverage (needs constellations), atmospheric drag (needs re-boosting), space debris congestion | Higher launch energy than LEO, requires more satellites for global coverage than GEO | Highest launch energy, significant communication delay, limited bandwidth, single point of failure |
Low-Earth Orbit (LEO): Characteristics & Strategic Importance
This mind map details the defining characteristics of Low-Earth Orbit (LEO), its inherent advantages and disadvantages, and its diverse applications, highlighting its growing strategic importance in space activities.
Low-Earth Orbit (LEO)
- ●Definition & Parameters
- ●Advantages
- ●Disadvantages & Challenges
- ●Key Applications & Strategic Importance
हालिया विकास
4 विकासRapid growth of mega-constellations of communication satellites (e.g., Starlink, OneWeb) in LEO, aiming to provide global broadband internet.
Increased focus on space debris mitigation and space situational awareness due to congestion in LEO.
Development of small satellite launch vehicles (SSLVs) specifically for deploying small satellites into LEO.
India's Gaganyaan mission targeting LEO for its human spaceflight.