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GPS L1 (1575.42 MHz)

GPS civilian C/A code · SBAS (WAAS/EGNOS) · L1C new civilian signal

Frequency Range1575.42 MHz (±12 MHz)
Wavelength19 cm
ITU / Standard—

Applications

  • →GPS civilian C/A code
  • →SBAS (WAAS/EGNOS)
  • →L1C new civilian signal
  • →Multi-GNSS: Galileo E1, BeiDou B1C

Propagation Characteristics

Receives signals from satellites at ~20,200 km altitude. Typical received power: -130 dBm. Requires clear sky view — blocked by buildings, foliage, and terrain.

Regulatory Notes

Protected RNSS allocation. Transmitting on L1 frequency without authorization is illegal in all jurisdictions. L1 band protected by ITU Radio Regulations.

Related Calculators

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Convert between frequency, wavelength, and wave number in free space or medium. Calculate half-wave and quarter-wave lengths for antenna and transmission line design.

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Calculate RF link budget: transmit power, free space path loss, antenna gains, and received signal level. Determine link margin and maximum range.

Free-Space Path Loss

Calculate free-space path loss (FSPL) using the Friis transmission equation for wireless link budget analysis

Patch Antenna

Calculate rectangular microstrip patch antenna dimensions (width, length) using the Transmission Line Model. Outputs effective dielectric constant, edge-feed impedance, and nominal gain for common substrates like FR4 and Rogers.