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Two-Line Element Set Format
en.wikipedia.org/wiki/Two-line_element_setYapay zekadan makale özeti
- Definition and Purpose
- TLE encodes orbital elements of Earth-orbiting objects at specific epochs
- Used for estimating positions and velocities of past or future objects
- Only describes trajectories of Earth-orbiting objects
- Historical Development
- Max Lane developed satellite prediction models in early 1960s
- SGP4 became de facto standard model in early 1970s
- Format evolved from punch cards to ASCII text files
- Technical Structure
- Contains orbital elements in 69-column ASCII lines
- Optional title line indicates three-line format
- Uses unique object identifier codes
- Checksums calculated by adding digits and negative signs
- Current Status
- Widely used for space debris tracking and analysis
- US Space Force maintains publicly available TLEs
- Accuracy of 1 km within days for low Earth orbit objects
- Format becoming increasingly limited with space commercialization