Understand VLEO Vs LEO Orbiting Satellites
Both VLEO and LEO satellites operate within the lower altitudes of Earth's orbit, making them suitable for a variety of applications such as Earth observation, communication and scientific research.
What is VLEO Orbit Satellite ?
These satellites operate at altitudes ranging from approximately 150 to 300 kilometers. They provide higher spatial resolution for imaging applications due to their closer proximity to Earth.
Applications of VLEO satellites are as follows.
• High resolution Earth observation
• low-latency communication
• atmospheric studies
• military reconnaissance
What is LEO Orbit Satellite ?
These satellites operate at altitudes ranging from approximately 300 to 2,000 kilometers. They offer good resolution but not as high as VLEO satellites due to their higher operational altitude.
Applications of LEO satellites are as follows.
• Earth observation
• satellite communications
• GNSS
• environmental monitoring
Difference between VLEO and LEO Satellite
Following table differentiates VLEO versus LEO satellites with respect to various features or parameters.
| Features | VLEO Satellite | LEO Satellite |
|---|---|---|
| Altitude | 150 to 300 Kilometers (93 to 186 miles) | 300 to 2000 Kilometers (186 to 1243 miles) |
| Resolution and image quality | Higher spatial resolution | Good resolution, lower than VLEO |
| Communication latenacy from VLEO satellite to devices on Earth | Lower | Slightly higher |
| Signal Strength | Stronger due to close proximity | Strong but not as strong as VLEO |
| Atmospheric drag | Significant | Less |
| Orbital Lifespan | Shorter | Longer |
| Launch costs | Lower | Higher |
| Coverage area | Smaller surface area per satellite | Larger surface area per satellite |
| Revisit Time | More frequent revisits | Less frequent revisits than VLEO |
| Orbital Decay and Space Debris | Quick natural deorbit due to high drag | Slower orbital decay, longer-term debris potential |
| Thermal and radiation exposure | More significant | Moderate |
Conclusion :
Despite their differences in altitude and specific advantages, VLEO and LEO satellites are crucial for advancing our capabilities in monitoring and interacting with our planet.
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